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Questions and Answers
Which characteristic of muscle tissue refers to the ability to extend or stretch?
Which characteristic of muscle tissue refers to the ability to extend or stretch?
- Elasticity
- Contractility
- Excitability
- Extensibility (correct)
What is the function of skeletal muscles related to the types of movement?
What is the function of skeletal muscles related to the types of movement?
- Heat production
- Stabilizes joints
- Maintenance of posture
- Produce movement (correct)
Which connective tissue covering covers each individual muscle fiber?
Which connective tissue covering covers each individual muscle fiber?
- Epimysium
- Perimysium
- Fascicle
- Endomysium (correct)
What is the moveable attachment point of a skeletal muscle while contracting called?
What is the moveable attachment point of a skeletal muscle while contracting called?
What is the fixed attachment point of a skeletal muscle while contracting called?
What is the fixed attachment point of a skeletal muscle while contracting called?
What is the ability of a muscle cell to recoil and resume its resting length called?
What is the ability of a muscle cell to recoil and resume its resting length called?
Why are skeletal muscles well vascularized organs?
Why are skeletal muscles well vascularized organs?
What is the ability of muscle tissue to receive and respond to a stimulus called?
What is the ability of muscle tissue to receive and respond to a stimulus called?
What is the ability of muscle tissue to forcibly shorten when adequately stimulated called?
What is the ability of muscle tissue to forcibly shorten when adequately stimulated called?
What is one of the functions of muscular system related to heat?
What is one of the functions of muscular system related to heat?
What is the enzyme present in myosin filaments that causes the reaction: $ATP
ightarrow ADP + P + energy$?
What is the enzyme present in myosin filaments that causes the reaction: $ATP ightarrow ADP + P + energy$?
What is the storage form for glucose in liver and muscle cells?
What is the storage form for glucose in liver and muscle cells?
What is the molecule in muscle cells which stores O2?
What is the molecule in muscle cells which stores O2?
What is the metabolic pathway requiring oxygen to regenerate ATP, producing 32 ATP molecules?
What is the metabolic pathway requiring oxygen to regenerate ATP, producing 32 ATP molecules?
What is the term for the fusion of contractions to produce a continuous muscle contraction?
What is the term for the fusion of contractions to produce a continuous muscle contraction?
What is the state of physiological inability to contract even though a stimulus is provided?
What is the state of physiological inability to contract even though a stimulus is provided?
What is the mechanism of ATP regeneration that involves the breakdown of glucose by glycolysis and the production of lactic acid?
What is the mechanism of ATP regeneration that involves the breakdown of glucose by glycolysis and the production of lactic acid?
What is the term for the adding together of force of contractions due to successive stimuli applied to a muscle forming a stronger contraction?
What is the term for the adding together of force of contractions due to successive stimuli applied to a muscle forming a stronger contraction?
What is the term for the relaxation period becoming shorter and shorter between muscle twitches when the muscle is stimulated at an increasingly faster rate?
What is the term for the relaxation period becoming shorter and shorter between muscle twitches when the muscle is stimulated at an increasingly faster rate?
What is the term for the sustained but quivering contraction due to wave summation?
What is the term for the sustained but quivering contraction due to wave summation?
What is the function of the perimysium in skeletal muscle structure?
What is the function of the perimysium in skeletal muscle structure?
What is the composition of the myofibrils?
What is the composition of the myofibrils?
Where is calcium stored for muscle cell contraction?
Where is calcium stored for muscle cell contraction?
What is the neuromuscular junction?
What is the neuromuscular junction?
What occurs during muscle relaxation?
What occurs during muscle relaxation?
What does a motor unit consist of?
What does a motor unit consist of?
What is the function of the epimysium in skeletal muscle structure?
What is the function of the epimysium in skeletal muscle structure?
What are the transverse tubules in muscle cells?
What are the transverse tubules in muscle cells?
What is the composition of the myofilaments in muscle cells?
What is the composition of the myofilaments in muscle cells?
What is the function of the fascia in skeletal muscle structure?
What is the function of the fascia in skeletal muscle structure?
Wave summation results in a weaker muscle contraction compared to unfused tetanus.
Wave summation results in a weaker muscle contraction compared to unfused tetanus.
Muscle tone is primarily due to voluntary signals from the nervous system.
Muscle tone is primarily due to voluntary signals from the nervous system.
Anerobic respiration produces 32 molecules of ATP from one molecule of glucose.
Anerobic respiration produces 32 molecules of ATP from one molecule of glucose.
The fusion of contractions to produce a continuous muscle contraction is known as complete tetanus.
The fusion of contractions to produce a continuous muscle contraction is known as complete tetanus.
Muscle fatigue can result from an inadequate supply of oxygen, a depletion of glycogen, and inadequate calcium release from the sarcoplasmic reticulum.
Muscle fatigue can result from an inadequate supply of oxygen, a depletion of glycogen, and inadequate calcium release from the sarcoplasmic reticulum.
The extra oxygen the body must take in to recover after vigorous exercise is known as Excess Postexercise Oxygen Consumption (EPOC).
The extra oxygen the body must take in to recover after vigorous exercise is known as Excess Postexercise Oxygen Consumption (EPOC).
Glycogen is the storage form for glucose in liver and muscle cells.
Glycogen is the storage form for glucose in liver and muscle cells.
Tetanus is the result of more calcium being available in the cytoplasm from the previous twitch.
Tetanus is the result of more calcium being available in the cytoplasm from the previous twitch.
Muscles ATP reserves are limited to about 4-6 minutes of activity.
Muscles ATP reserves are limited to about 4-6 minutes of activity.
Aerobic respiration is a metabolic pathway requiring oxygen to regenerate ATP, producing 32 ATP molecules.
Aerobic respiration is a metabolic pathway requiring oxygen to regenerate ATP, producing 32 ATP molecules.
Muscle tissue's excitability refers to its ability to forcibly shorten when adequately stimulated
Muscle tissue's excitability refers to its ability to forcibly shorten when adequately stimulated
Skeletal muscles are not well vascularized organs
Skeletal muscles are not well vascularized organs
Each muscle is not supplied by a nerve ending
Each muscle is not supplied by a nerve ending
Skeletal muscles can have more than one origin and/or insertion
Skeletal muscles can have more than one origin and/or insertion
The endomysium covers each individual muscle fiber
The endomysium covers each individual muscle fiber
The moveable attachment point of a skeletal muscle while contracting is called the insertion
The moveable attachment point of a skeletal muscle while contracting is called the insertion
The stationary/fixed attachment point of a skeletal muscle while contracting is called the insertion
The stationary/fixed attachment point of a skeletal muscle while contracting is called the insertion
Muscle tissue's contractility refers to its ability to extend or stretch
Muscle tissue's contractility refers to its ability to extend or stretch
Muscle tissue's extensibility refers to its ability to recoil and resume its resting length
Muscle tissue's extensibility refers to its ability to recoil and resume its resting length
The ability of a muscle cell to recoil and resume its resting length is called elasticity
The ability of a muscle cell to recoil and resume its resting length is called elasticity
Perimysium is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
Perimysium is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
The sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
The sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
The sarcolemma is the cell membrane of a muscle cell, while the sarcoplasm is the cytoplasm containing numerous nuclei, mitochondria, glycosomes, and myoglobin
The sarcolemma is the cell membrane of a muscle cell, while the sarcoplasm is the cytoplasm containing numerous nuclei, mitochondria, glycosomes, and myoglobin
Myofibrils consist of three kinds of protein filaments: myosin, actin, and tropomyosin
Myofibrils consist of three kinds of protein filaments: myosin, actin, and tropomyosin
The neuromuscular junction is where the end of a motor neuron communicates with the sarcoplasmic reticulum of a muscle cell
The neuromuscular junction is where the end of a motor neuron communicates with the sarcoplasmic reticulum of a muscle cell
Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
The epimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
The epimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
Fascia is fibrous connective tissue that blends with the perimysium or holds groups of skeletal muscles together
Fascia is fibrous connective tissue that blends with the perimysium or holds groups of skeletal muscles together
Perimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
Perimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
Epimysium is dense irregular connective tissue surrounding an entire skeletal muscle
Epimysium is dense irregular connective tissue surrounding an entire skeletal muscle
Sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
Sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
The neuromuscular junction is where the end of a motor neuron communicates with the sarcolemma of a muscle cell
The neuromuscular junction is where the end of a motor neuron communicates with the sarcolemma of a muscle cell
Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
Myofibrils, comprising 80% of the cell volume, consist of two kinds of protein filaments: myosin and actin
Myofibrils, comprising 80% of the cell volume, consist of two kinds of protein filaments: myosin and actin
Transverse tubules are invagination tubes of the sarcolemma and are situated between two cisternae of sarcoplasmic reticulum
Transverse tubules are invagination tubes of the sarcolemma and are situated between two cisternae of sarcoplasmic reticulum
Perimysium is the dense irregular connective tissue surrounding an entire skeletal muscle
Perimysium is the dense irregular connective tissue surrounding an entire skeletal muscle
The sarcoplasmic reticulum is a specialized form of rough endoplasmic reticulum that stores calcium for muscle cell contraction
The sarcoplasmic reticulum is a specialized form of rough endoplasmic reticulum that stores calcium for muscle cell contraction
Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
The end of a motor neuron communicates with the sarcolemma of a muscle cell at the neuromuscular junction
The end of a motor neuron communicates with the sarcolemma of a muscle cell at the neuromuscular junction
The moveable attachment point of a skeletal muscle while contracting is called the insertion
The moveable attachment point of a skeletal muscle while contracting is called the insertion
Skeletal muscles can have more than one origin and/or insertion
Skeletal muscles can have more than one origin and/or insertion
Tetanus is the result of more calcium being available in the cytoplasm from the previous twitch
Tetanus is the result of more calcium being available in the cytoplasm from the previous twitch
Wave summation results in a weaker muscle contraction compared to unfused tetanus
Wave summation results in a weaker muscle contraction compared to unfused tetanus
Study Notes
Skeletal Muscle Structure and Contraction
- Perimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
- Epimysium is dense irregular connective tissue surrounding an entire skeletal muscle
- Fascia is fibrous connective tissue that blends with the epimysium or holds groups of skeletal muscles together
- Sarcolemma is the cell membrane of a muscle cell, while sarcoplasm is the cytoplasm containing numerous nuclei, mitochondria, glycosomes, and myoglobin
- Myofibrils, comprising 80% of the cell volume, consist of two kinds of protein filaments: myosin and actin
- Sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
- Transverse tubules are invagination tubes of the sarcolemma and are situated between two cisternae of sarcoplasmic reticulum
- Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
- The neuromuscular junction is where the end of a motor neuron communicates with the sarcolemma of a muscle cell
- Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
- Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
- A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
Skeletal Muscle Structure and Contraction
- Perimysium is dense irregular connective tissue surrounding bundles of muscle fibers known as fascicles
- Epimysium is dense irregular connective tissue surrounding an entire skeletal muscle
- Fascia is fibrous connective tissue that blends with the epimysium or holds groups of skeletal muscles together
- Sarcolemma is the cell membrane of a muscle cell, while sarcoplasm is the cytoplasm containing numerous nuclei, mitochondria, glycosomes, and myoglobin
- Myofibrils, comprising 80% of the cell volume, consist of two kinds of protein filaments: myosin and actin
- Sarcoplasmic reticulum is a specialized form of smooth endoplasmic reticulum that stores calcium for muscle cell contraction
- Transverse tubules are invagination tubes of the sarcolemma and are situated between two cisternae of sarcoplasmic reticulum
- Myofilament structure includes thick filaments made of myosin and thin filaments made of actin, tropomyosin, and troponin
- The neuromuscular junction is where the end of a motor neuron communicates with the sarcolemma of a muscle cell
- Events of a skeletal muscle contraction involve nerve impulses, calcium release, and the formation of cross bridges between thick and thin filaments
- Muscle relaxation occurs when the nerve impulse ceases, Ach is broken down, calcium is pumped back into the sarcoplasmic reticulum, and the cross bridges are broken
- A motor unit consists of a single motor neuron and all the muscle fibers it controls, with different degrees of coordination and power in different muscle groups
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Description
Test your knowledge of skeletal muscle structure and contraction with this quiz. Learn about the components such as perimysium, epimysium, and sarcolemma, as well as the events involved in muscle contraction and relaxation. Understand the role of neuromuscular junction and motor units in muscle function.
