Test your knowledge of epithelial, connective, muscle, and nervous tissues with these flashcards. Find out the answer to the question "All muscle cells contain striations?" and … Study with Quizlet and memorize flashcards containing terms like All muscle cells contain striations., Smooth muscle _____., Under a microscope you observe a tissue that appears to have long fibers that appear striated. The nuclei are pushed off to the side of the fibers. The tissue looks very vascular. Skeletal muscle looks striped or "striated" – the fibres contain alternating light and dark bands (striations) like horizontal stripes on a rugby shirt. In skeletal muscle, the fibres …The sarcomeres, or function units of actin and myosin, produce the banding that can be seen in striated muscle. This can be seen in the image below. Skeletal muscle Visceral Muscle. By contrast, visceral muscle cells do not contain these stark bands of protein, and the actin and myosin fibers work differently.Skeletal Muscle. Skeletal muscle has striations across its cells caused by the arrangement of the contractile proteins actin and myosin. These muscle cells are relatively long and have multiple nuclei along the edge of the cell. Skeletal muscle is under voluntary, somatic nervous system control and is found in the muscles that move bones. There are six actin molecules around a single myosin molecules and there are more than 100,000 sarcomeres (one myosin and six actin make 1 sarcomere) in a single bicep muscle fibre (a single cell) and 253000 such fibres in a young man's bicep. Now even if 10 percent of such fibres are stimulated at once there are more than 2530000000 sarcomeres ... Study with Quizlet and memorize flashcards containing terms like Which of the following muscle types is also known as striated involuntary muscle?, Which type of muscle tissue is found in the walls of blood vessels and in the digestive, respiratory, urinary, and reproductive organs?, Which two muscle tissues are striated? and more.Abstract. The striated muscle cell cytoskeleton is a multifunctional, dynamic, and complex structure that serves as a scaffold to maintain the structural integrity and architecture of the cell. However, it also functions as a platform for inter- and intracellular signaling, linking the contractile apparatus so that sarcomeres may function in ...Oct 30, 2023 · Striated muscle; formed of long, multinucleate, unbranched myocytes. Attached at one or either ends to a bony attachment point. Cardiac muscle. Striated muscle; formed of short, uninucleate, branching myocytes which connected at intercalated discs. Specialized muscle of the heart → myocardium. Smooth muscle. Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. [1] [2] The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. [3] The muscle tissue of a skeletal muscle is ...Our current understanding of the structure of the thin filaments of muscle and the molecular mechanism by which thin filaments regulate muscle contraction are reviewed and discussed. We focus, in particular, on the crucial role played by Jean Hanson in these studies and on later contributions from those whose work she influenced.There are more than 600 lymph nodes throughout the body. Lymph nodes contain millions of infection-fighting cells called lymphocytes. When the body contracts an infection or diseas...6/24/2019. View full document. Question 20: All muscle cells contain striations. FALSE. Smooth muscle cells do not contain striations. Although they do contain myofilaments, their arrangement is not regular enough to generate the striations seen in skeletal or cardiac muscle cells. Question 21: Which of the following is NOT a characteristic of ...Cardiac muscle is striated muscle that is present only in the heart. Cardiac muscle fibers have a single nucleus, are branched, and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and desmosomes to hold the fibers together when the heart contracts. Contraction in each cardiac muscle fiber ...Figure 9.2.2. Muscle fibre. A skeletal muscle fibre is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells. A muscle fibre is composed of many fibrils, which give the cell its striated appearance. The Sarcomere. The sarcomere is the functional unit of the muscle fibre.Skeletal muscle cells. -are very long. -develop through fusion of myoblasts. -become very large. -contain hundreds of nuclei. The sarcolemmma and transverese tubules. The sarcolemma. -the cell membrane of a muscle fiber (cell) -surrounds the sarcoplasm (cytoplasm of muscle fiber)A SIM (subscriber identity module) card contains information that allows cell phone carriers to identify a phone and for subscribers to store data and settings. SIM cards make it p...Muscles are composed of long bundles of myocytes or muscle fibers. Myocytes contain thousands of myofibrils. Each myofibril is composed of numerous sarcomeres, the functional contracile region of a striated muscle. Sarcomeres are composed of myofilaments of myosin and actin, which interact using the sliding filament model and cross-bridge cycle ...Figure 17.3.4 17.3. 4 show the spread of the electrical wave through these structures and the myocardial contractile cells. Figure 17.3.4 17.3. 4: Cardiac Conduction. (1) The sinoatrial (SA) node and the remainder of the conducting system are at rest. (2) The SA node initiates the electrical wave, which sweeps across the atria.A. the cells are connected by gap junctions. B. are under involuntary control. C.neural connections occur through varicosities. D. striations are structured as a sarcomere. D. Study with Quizlet and memorize flashcards containing terms like What is the regulatory protein component of the thin filament that binds to calcium, thereby initiating ...The cells are interconnected physically and electrochemically to act as a syncytium. Cardiac muscle cells contract autonomously and involuntarily. Smooth muscle is involuntary. Each cell is a spindle-shaped fiber and contains a single nucleus. No striations are evident because the actin and myosin filaments do not align in the cytoplasm.So if we look at our muscle cells under a microscope, we'll see that they've got these striations on them, these bands, because remember, another name for ...Identify the cellular junction labeled 1. tight junction. Which of the following is a function of epithelial tissues? control permeability. Study with Quizlet and memorize flashcards containing terms like Skeletal muscle is to muscle tissue as bone is to, The muscle tissue without striations is ________ muscle., Tissue that contains large ...Muscle Tissue Definition. Muscle tissue is a specialized tissue found in animals which functions by contracting, thereby applying forces to different parts of the body. Muscle tissue consists of fibers of muscle cells connected together in sheets and fibers. Together these sheets and fibers and known as muscles, and control the movements of an ... Compared to skeletal muscle, smooth muscle cells are small. They are spindle shaped and have no striations. Instead, they have bundles of thin and thick filaments. Looking closer at skeletal muscle. All skeletal muscle fibres are not the same. They differ in structure and function, for example, in the speed they can contract. synergists- contribute to an action by helping the agonist. Describe 3 aging-related changes in the muscular system. 1) Myoglobin, ATP, and Creatine decline.2) Gradually muscles become smaller and drier.3) By 80 half of muscle has atrophied. Explain the benefits of exercise for maintaining muscular health while aging.A motor neuron and the muscle cells it innervates form a motor unit. Motor unit. General. Formed by a motor neuron and the muscle cells it innervates. A motor unit only contains one type of skeletal muscle cells. The number of muscle cells per motor unit varies from several to hundreds, according to how delicate movements the muscle performs, e.g.:True or False: All muscle cells contain striations. False. In adult humans, most cancers are carcinomas or adenocarcinomas. These include cancers of the skin, lung, colon, breast, and prostate. Which of the four basic tissue types is involved, and why? a. Connective tissue: it is found everywhere in the body, and is the only tissue common to ...The cardiac myocyte is a specialized striated muscle cell that is approximately 25 μ in diameter and about 100 μ in length. They form a branching network of cells that are connected by intercalated discs. The myocyte is composed of bundles of myofibrils that contain myofilaments. The myofibrils have distinct, repeating microanatomical units ...This will result in ________. the coordination of nerve signals to muscle fibers. interlocking of cells that can prevent the filaments. from sliding. the striations that appear in skeletal and cardiac muscle tissues. multinucleated muscle fibers that can extend as long as 30 centimeters.Skeletal Muscle Tissue. The striations are evidence of the myofilaments inside the muscle fibers. The position of the nuclei and vascularity are also signs of muscle tissue. You observe a tissue under a microscope. There appears to be a lumen on one side of the tissue. Lining this lumen, the cells seem to have long, fingerlike projections.cardiac muscle tissue. - short, branched cells. - single, centrally located nuclei. - intercalated discs where 2 cells join together. - striated. - only in heart, contracts at steady rate set by pacemaker. - neural controls allow responses to change in bodily needs. - intermediate speed of contraction. smooth muscle tissue.Cardiac Muscle. Cardiac muscle, also known as heart muscle, is the layer of muscle tissue which lies between the endocardium and epicardium. These inner and outer layers of the heart, respectively, surround the cardiac muscle tissue and separate it from the blood and other organs. Cardiac muscle is made from sheets of cardiac muscle cells.Skeletal muscle cells. Presence of visible striations & multiple peripheral nuclei. Smooth muscle cell. Absence of visible striations & single, centrally located nuclei number of nuclei. Epimysium. Connective tissue which immediately surrounds a muscle. Perimysium. Connective tissue around the fascicles. Terminal cisternae.Figure 1. Muscle Tissue. (a) Skeletal muscle cells have prominent striation and nuclei on their periphery. (b) Smooth muscle cells have a single nucleus and no visible striations. (c) Cardiac muscle cells appear striated and have a single nucleus. From top, LM × 1600, LM × 1600, LM × 1600.The stomach—cardiac muscle. The heart—skeletal muscle. The small intestine—skeletal muscle. The aorta—cardiac muscle. The bladder—smooth muscle. Correct answer: The bladder—smooth muscle. Explanation: Smooth muscle is found is the bladder, intestines, blood vessels, and a lot of other places that have involuntary motion.Most skeletal muscles contain _____. myofibrils. multiunit muscles. a mixture of fiber types. a predominance of slow oxidative fibers. 34 of 48. Term. ... Striated muscle cells are long and cylindrical with many nuclei. motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP ...Anatomy Chap 4. Get a hint. All muscle cells contain striations. Click the card to flip 👆. False. *Smooth muscle cells do not contain striations. Although they do contain myofilaments, their arrangement is not regular enough to generate the striations seen in skeletal or cardiac muscle cells. Click the card to flip 👆.A)Smooth muscle has more troponin than skeletal muscle. B)Actin and myosin generate force through the crossbridge cycle. C)Smooth muscle has the fastest myosin ATPase activity. D)Smooth muscle receives neural input from the somatic nervous system. B)Actin and myosin generate force through the crossbridge cycle.It has long cells with striations and it is sometimes called striated muscle. Smooth muscle is slow moving, and is not controlled by the mind. It is also has the same functional units as skeletal ... Figure 10.4 Muscle Fiber A skeletal muscle fiber is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells. A muscle fiber is composed of many fibrils, which give the cell its striated appearance. – Contain one layer of cells. – Named by shape of ... • Every cell reaches the basement membrane (but not all cells ... • In muscle cells: changes in voltage result ...These muscles are all striated muscles, with contractile proteins organized into sarcomeres, but they are involuntary and visceral muscles. ... Smooth muscle cells contain the c-kit + interstitial cells of Cajal . The bile duct has only one muscular layer (muscularis mucosae), with limited contractile capacity, ...All muscle cells contain striations. False. Which is true concerning muscle tissue? Highly cellular and well vascularized. Which tissue type consists of a sheet of cells that covers a body surface or lines a body cavity? Epithelial. See an expert-written answer!A) Isotonic. B) Quceps are the prime mover, Hamstring group is the antagonist. C) Third class lever. Study with Quizlet and memorize flashcards containing terms like Cardiac and skeletal muscles contain visible bands that are called, The muscular layer of the intestine is composed of visceral, or ___________, muscle., The ability of muscle ...Each skeletal muscle cell, also called a muscle fiber, develops as many embryonic myocytes fused into one long, multi-nucleated skeletal muscle cell. These muscle fibers are bound together into bundles, or fascicles, and are supplied with a rich network of blood vessels and nerves. The fascicles are then bundled together to form the intact muscle.Learn about the three types of muscle cells in the human body: cardiac, skeletal, and smooth. Skeletal muscle cells are striated, meaning they have stripes or bands, due to the arrangement of their proteins.When muscle cells are viewed under the microscope, one can see that they contain a striped pattern (striations). This pattern is formed by a series of basic units called sarcomeres that are ...An intercalated disc allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump. Figure 10.7.2 10.7. 2: Cardiac Muscle. Intercalated discs are part of the cardiac muscle sarcolemma and they contain gap junctions and desmosomes. Contractions of the heart (heartbeats) are controlled by … Cardiac muscle cells generally only contain one nucleus, located in the central region. They contain many mitochondria and myoglobin. Unlike skeletal muscle, cardiac muscle cells are unicellular. These cells are connected to each other by intercalated disks, which contain gap junctions and desmosomes. Striated versus smooth muscle Skeletal Muscle Tissue. The striations are evidence of the myofilaments inside the muscle fibers. The position of the nuclei and vascularity are also signs of muscle tissue. You observe a tissue under a microscope. There appears to be a lumen on one side of the tissue. Lining this lumen, the cells seem to have long, fingerlike projections.True or False False (Smooth muscle cells do not contain striations. Although they do contain myofilaments, their arrangement is not regular enough to generate the striations seen in skeletal or cardiac muscle cells.) All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. This property ...A skeletal muscle fiber is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells. A muscle fiber is composed of many fibrils, which give the cell its striated appearance.The muscle cell, also known as the myocyte is the smallest subunit of all muscular tissues and organs throughout the body. It is here in the myocyte, where the physiological steps of muscle contraction and where the pathophysiology of numerous muscular diseases takes place. There are three types of muscle cells in the human body: skeletal, smooth, and cardiac muscle. The common function of ...Figure 8.3.1 8.3. 1: Skeletal Muscle Organ Structure. Each level of the organization of a skeletal muscle is wrapped in a connective tissue layer: the cell (myofiber) is surrounded by the endomysium, the bundle of cells (muscle fascicle) is surrounded by the perimysium, and the organ (muscle) is surrounded by the epimysium.The cells that make up muscle tissue are called _____ myocytes. Match each type of muscle with the correct description of its structure. ... Select all correct descriptions of smooth muscle. fibers are uninucleated cells are spindle-shaped fibers are striated contains intercalated disks contraction is involuntary.composed of nonstriated muscle cells 2. composed of striated muscle cells 3. involuntarily controlled 4. voluntarily controlled. epimysium. In the figure shown, ... Myofibrils contain both thin and thick filaments. (True or False) cardiac. …Skeletal muscle fibers are classified into two types: type 1 and type 2. Type 2 is further broken down into subtypes. Type 1. These fibers utilize oxygen to generate energy for movement. Type 1 ...- Cytoplasm of the cardiac cell contains contractile proteins (myofilaments). - Cytoplasm also contains carbohydrate glycogen. - Myofilaments - actin and myosin have a parallel orientation along the axis of a muscle fiber/myocyte. - Thin filament (actin) is anchored to the Z-disc (Z-line).The musculoskeletal system comprises one of the body's major tissue/organ systems. The three main types of muscle tissue are skeletal, cardiac, and smooth muscle groups.[1][2][3] Skeletal muscle attaches to the bone by tendons, and together they produce all body movements. The skeletal muscle fibers are crossed with a regular pattern of fine red and white lines, giving the muscle a distinctive ...There are more than 600 lymph nodes throughout the body. Lymph nodes contain millions of infection-fighting cells called lymphocytes. When the body contracts an infection or diseas...A myofilament is more complex structure than a myofibril. a. true. b. false. b. false. The connective tissue coverings of a skeletal muscle. a. bind the contractile structures to form functional units. b. are only located on its surface. c. contract. d. are produced by the skeletal muscle cells.Study with Quizlet and memorize flashcards containing terms like All muscle cells contain striations., Smooth muscle_____., Under a microscope you observe a tissue that appears to have long fibers that appear striated. The nuclei are pushed off to the side of the fibers. The tissue looks very vascular. What type of tissue are you observing? and more.The striated appearance of skeletal muscles is created by the arrangement of _____ inside the cells that form muscle tissue. ... Red blood cells contain gas-transporting molecules called. ... The striated appearance of skeletal muscles is created by the arrangement of _____ inside the cells that form muscle tissue. Choose matching definition ...One of the most iconic images in biology is the cross-striated appearance of a skeletal muscle fiber. The repeating band pattern shows that all of the sarcomeres are the same length. All of the A bands are the same length and are located in the middle of the sarcomeres. Furthermore, all of the myofibrils are transversely aligned across the …striated: The striped appearance of certain muscle types in which myofibrils are aligned to produce a constant directional tension. voluntary: A muscle movement under conscious control (e.g. deciding to move the forearm). involuntary: A muscle movement not under conscious control (e.g. the beating of the heart). myocyte: A muscle cell.Skeletal muscle is voluntary and striated. These are the muscles that attach to bones and control conscious movement. Smooth muscle is involuntary and non-striated. It is found in the hollow organs of the body, such as the stomach, intestines, and around blood vessels. Cardiac muscle is involuntary and striated. It is found only in the heart ...Muscle is a soft tissue, one of the four basic types of animal tissue.Muscle tissue gives skeletal muscles the ability to contract.Muscle is formed during embryonic development, in a process known as myogenesis.Muscle tissue contains special contractile proteins called actin and myosin which interact to cause movement. Among many other muscle proteins present are two regulatory proteins ...a. an external body surface that is dry. b. a basic body plan that resembles a two-layered sac. c. a body surface covered with hair to keep them warm. d. most of their cells in contact with an aqueous medium. d. most of their cells in contact with an aqueous medium. Generally, epithelial cell layers are responsible for separating two fluids ...Saf. 26, 1442 AH ... ... muscle-quiz-anatomy/ Smooth muscle cells develop into a fusiform shape. They do not contain myofibrils or sarcomeres, but they do utilize ...Multi-unit smooth muscle cells contain fewer gap junctions, and are innervated individually. 8. Smooth muscle contracts via sliding actin and myosin ±laments. a. True b. False The answer is a, true. Similar to cardiac and skeletal muscle, myosin heads attach to the actin ±laments and pull the ±lament, which in turn pulls on the dense bodies ... Study with Quizlet and memorize flashcards containing terms like List the three types of muscle cells and their locations, Diagram the arrangement of thick and thin filaments in a striated muscle sarcomere, and label the major bands that give rise to the striated pattern., Describe the organization of myosin, actin, tropomyosin, and troponin molecules in the thick and thin filaments. and more. a. The rate of chemical reactions increases in muscle fibers during contraction, so the rate of heat production also increases. b. Muscle contraction generates pyrogens which reset the body's internal thermostat to a higher temperature. c. Muscle activity directs more warm blood to the muscles away from the central core causing a cooling effect ...characteristics of skeletal muscle. -multinucleated. -contains many mitochondria. -has transverse tubules. -has myofibrils and sarcomeres. what makes up a muscle fiber? a muscle fiber is a single muscle cell. -made up of myofibrils. -which are sarcomeres put together end to end (made up of thin and thick filaments)Muscle is a soft tissue, one of the four basic types of animal tissue.Muscle tissue gives skeletal muscles the ability to contract.Muscle is formed during embryonic development, in a process known as myogenesis.Muscle tissue contains special contractile proteins called actin and myosin which interact to cause movement. Among many other muscle …Cardiac muscle cells or cardiomyocytes (also known as cardiac myocytes) are the muscle cells (myocytes) that make up the heart muscle. Cardiomyocytes go through a contraction-relaxation cycle that enables cardiac muscles to pump blood throughout the body. [In this image] Immunostaining of human cardiomyocytes with antibodies for actin (red ...Study with Quizlet and memorize flashcards containing terms like All muscle cells contain striations. True False, Smooth muscle _____. is under involuntary control has striations has long, cylindrical cells contains intercalated discs, Under a microscope you observe a tissue that appears to have long fibers that appear striated. The nuclei are pushed off to the side of the fibers.Skeletal muscle contains more actin and myosin myofilaments than smooth muscle. Smooth muscle cells are larger than skeletal muscle cells. 1. Unlike skeletal muscle, smooth muscle is striated in appearance.: False. 2. In smooth muscle, the actin and myosin myofilaments are in loose bundles.: True. 3.Gene Ontology Term: striated muscle cell development. The process whose specific outcome is the progression of a striated muscle cell over time, from its formation to the mature structure. Striated muscle cells contain fibers that are divided by transverse bands into striations, and cardiac and skeletal muscle are types of striated muscle.
true. Events of muscle contraction. 1.) a nerve impulse causes ACh release at a neuromuscular junction. 2.) ACh binds receptors on the motor end plate, initiating a muscle impulse. 3.) calcium ions bind to troponin, causing tropomyosin to move and expose active sites. 4.) myosin heads attach to actin and form crossbridges.. Kaiser orchard pharmacy hours
Muscle is a soft tissue, one of the four basic types of animal tissue.Muscle tissue gives skeletal muscles the ability to contract.Muscle is formed during embryonic development, in a process known as myogenesis.Muscle tissue contains special contractile proteins called actin and myosin which interact to cause movement. Among many other muscle …a) smooth muscle cell does not contain enough calcium to maintain contraction for long periods of time. Once four Ca++ ions bind to the calmodulin, the Ca- calmodulin complex binds to the myosin light chain kinase and activates it. b) a protein that in humans is encoded by the CALD1 gene.Cardiac muscle is striated muscle that is present only in the heart. Cardiac muscle fibers have a single nucleus, are branched, and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and desmosomes to hold the fibers together when the heart contracts. Contraction in each cardiac muscle fiber ...Cardiac Cell Histology Cardiac cells - myocytes - are arranged in layers and are shorter than skeletal muscles - Cardiac muscle has properties of a skeletal muscle and of a smooth muscle - Cardiac muscle cell has 1-2 nuclei (myonuclei)What type of tissue are you observing?, All muscle cells contain striations and more. Study with Quizlet and memorize flashcards containing terms like Which is true concerning muscle tissue? cuboidal shape enhances function contains contractile units made of collagen is a single-celled tissue highly cellular and well vascularized, Under a ...Skeletal Muscle Tissue. The striations are evidence of the myofilaments inside the muscle fibers. The position of the nuclei and vascularity are also signs of muscle tissue. You observe a tissue under a microscope. There appears to be a lumen on one side of the tissue. Lining this lumen, the cells seem to have long, fingerlike projections.Learn about the three types of muscle tissue: skeletal, cardiac, and smooth. Skeletal muscle cells are striated and …Smooth muscle is made of single, spindle-shaped cells. It gets its name because no striations are visible in them. Nonetheless, each smooth muscle cell contains thick (myosin) and thin (actin) filaments that slide against each other to produce contraction of the cell. The thick and thin filaments are anchored near the plasma membrane (with the ...What type of muscle tissue is striated and under voluntary control? skeletal. Muscle tissue has all of the following characteristics except. secretion. Which of the following connective tissue layers surrounds a fascicle? perimysium. What is the functional unit of skeletal muscle? sarcomere.Study with Quizlet and memorize flashcards containing terms like which of the following statements is true concerning calcium ions? a. in smooth muscle it binds with calmodulin b. in skeletal muscle it binds with calmuldin c. in smooth muscle it binds with tropinin d. in skeletal muscle it binds with tropomyosin e. in smooth muscle it binds with myosin light-chain kinase, The sequence for ...It has long cells with striations and it is sometimes called striated muscle. Smooth muscle is slow moving, and is not controlled by the mind. It is also has the same functional units as skeletal ...Skeletal muscle is an excitable, contractile tissue responsible for maintaining posture and moving the orbits, together with the appendicular and axial skeletons. It attaches to bones and the orbits through tendons. Excitable tissue responds to stimuli through electrical signals. Contractile tissue is able to generate tension of force.Smooth muscle is characterized by all of the following except: A) it appears to lack troponin B) there are more thick filaments than thin filaments C) there are no sarcomeres D) there are noncontractile intermediate filaments that attach to dense bodies w; A sarcomere is: A. The contractile unit of a muscle. B. Striations of a muscle. C.Study with Quizlet and memorize flashcards containing terms like which of the following statements is true concerning calcium ions? a. in smooth muscle it binds with calmodulin b. in skeletal muscle it binds with calmuldin c. in smooth muscle it binds with tropinin d. in skeletal muscle it binds with tropomyosin e. in smooth muscle it binds with myosin light-chain kinase, The sequence for ...Describe the three physiologic functions of the nervous system, and correlate those functions to the organization of the nervous system: sensory input, integration, motor output to an effector like muscles or glands. We have an expert-written solution to this problem! Describe the structure of a neuron. Compared to skeletal muscle, smooth muscle cells are small. They are spindle shaped and have no striations. Instead, they have bundles of thin and thick filaments. Looking closer at skeletal muscle. All skeletal muscle fibres are not the same. They differ in structure and function, for example, in the speed they can contract. .
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