What would happen without input from gamma motor neurons? A) Information about velocity would continue, but information about length would no longer be possible. B) The spindles would be unable to provide feedback as the muscle contracted. C) Neither the intrafusal nor extrafusal fibers would contract. D) The extrafusal fibers would not contract, but the intrafusal fibers would continue to contract.

Q: 2) The longissimus (intermediate) muscle group is controlled by nerves from the: a) anterior…

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Q: Which of the following statements are true of the location and function of muscles? a) The rectos…

A: Skeletal muscles are one of the three important categories in the human musculature (the other two…

Q: 23) which of the following is true about skeletal muscle?  a) they depend entirely on anaerobic…

A: Skeletal muscles are made of long, cylindrical thin cells that contain highly organised proteins and…

Q: Explain in detail: 1) how an action potential occurs in a lower motor neuron, 2) how the motor…

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Q: Which of the following muscle cell components helps spread the depolarization of the muscle cell…

A: The objective of the question is to identify the muscle cell component that is responsible for…

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A: Muscles: - muscles are responsible for he movementof the body. They are attached to the bones…

Q: What is the sequence of events that occur when a muscle fiber contracts (begin with release of…

A: The contraction of the skeletal muscles is best explained by the Sliding filament theory. This…

Q: To build individual muscle strength and muscle girth (i.e. bulk up), it is best to: O a) do…

A: In the field of fitness and strength training, building strength and girth in muscles is a common…

Q: What type of cells sit outside the sarcolemma of a muscle fiber but below the basement membrane of…

A: Sarcolemma The plasma membrane of the muscle cell is called sarcoplasm and it is surrounded by he…

Q: 13) skeletal muscle fibers contract because thick filaments slide over and between thin filaments…

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Q: How can I describe skeletal muscle contraction using the words "upper motor neuron" and "lower motor…

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Q: Which of the following does NOT happen when your muscles are fatigued? A) Lactic acid buildup causes…

A: The inability of a muscle to maintain force of contraction after prolonged activity is called muscle…

Q: What happens to sarcomeres when actin and myosin filaments in a muscle fiber interact during the…

A: Answer - According to the question option B is correct which says : -  sarcomeres usually get…

Q: Summation in a single muscle fibre means that Select one: a. the fibre increases the frequency of…

A: Introduction Muscle contraction:- It is the activation of tension-generating sites within muscle…

Q: identify the incorrect statement about skeletal muscle  (A) the epimysium, perimysium, and…

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Q: Distinguish between (a) direct and indirect muscle attachments and (b) a tendon and an aponeurosis.

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Q: What effect does increasing the frequency of action potentials in askeletal muscle fiber have upon…

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Q: What is the difference between isometric and isotonic contractions?

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Q: A muscle fiber is the same thing as a: a) myofibril. b) myocyte. c) myofilament. d) fascicle.

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Q: In order to excite a skeletal muscle, the neurotransmitter must bind to: a)calcium channels. b)…

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Q: What factors determine the duration of an isotonic twitch in skeletal muscle? An isometric twitch?

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Q: How does the shortening of sarcomeres explain musclecontraction?

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Q: 8. Which muscle fiber type is always recruited first? A)Type IIa B)Type IIb C)Type I or type IIa,…

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A: Muscles  play an important part in locomotion and movement. They are derived from mesodermal layer…

Q: Match the level of skeletal muscle organization given in the key with its description:Key:(a) muscle…

A: 1) rod shaped organelle made of sarcomeres :  myofibril…

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Q: Which of the following can respond to increased stimulation with a graded response: a) motoraxon…

A:

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Q: Which of these events occurs during the team phase, just when a muscle has been stimulated? a) Ca2…

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Q: what role does calcium play in muscle contraction? a) calcium is not involved in skeletal muscle…

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Q: n order for the muscles to contract ______ must bind to receptors in the muscles. a) Serotonin b)…

A:

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Q: Which part of a skeletal muscle does shorten during muscular contraction? A) Thick filaments B) Thin…

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Q: As the frequency of stimuli increases, individual twitches begin to build on each other in the…

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Q: 26) muscle tone is .... a) the ability of a muscle to efficiently cause skeletal movements  b) the…

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Q: Why does repeated stimulation of the muscle (at maximum stimulus) before it has completely recovered…

A: Muscle contraction is the phenomenon of decreasing in size or shortening or compacting the muscle…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.