Anatomy and Physiology Study Set 1

Biology

Quiz 8 :
Muscular System

Quiz 8 :
Muscular System

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Endomysium separates individual muscle fibers from each other.
Free
True False
Answer:

Answer:

True

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An isotonic contraction is one that involves a change in length but not a change in tension.
Free
True False
Answer:

Answer:

True

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In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.
Free
True False
Answer:

Answer:

False

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The enzyme ATPase is located in the heads of myosin molecules.
True False
Answer:
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Acetylcholine released by a motor neuron crosses the synaptic cleft and reaches the motor end plate by diffusion.
True False
Answer:
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ATP is necessary for muscle relaxation.
True False
Answer:
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Cardiac muscle is located in the walls of blood vessels.
True False
Answer:
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The muscle most responsible for a particular movement is called the prime mover or antagonist.
True False
Answer:
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Troponin, tropomyosin and actin are all parts of the thin filaments.
True False
Answer:
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Acetylcholinesterase breaks down the cross-bridge linkages between myosin to actin.
True False
Answer:
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During the process of glycolysis, the breakdown of one glucose molecules results in production of two ATP molecules.
True False
Answer:
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Muscle fatigue results from a combination of insufficient calcium and an excessof acetylcholine.
True False
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If frequency of stimulation to a muscle fiber is increased, the force of contraction will increase.
True False
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Recruitment refers to increasing the number of motor units involved in a muscle contraction.
True False
Answer:
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Intercalated discs are found in skeletal muscle and cardiac muscle, but are not present in smooth muscle.
True False
Answer:
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Endomysium separates individual muscle fibers from each other.
True False
Answer:
arrow
An isotonic contraction is one that involves a change in length but not a change in tension.
True False
Answer:
arrow
In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.
True False
Answer:
arrow
The enzyme ATPase is located in the heads of myosin molecules.
True False
Answer:
arrow
Acetylcholine released by a motor neuron crosses the synaptic cleft and reaches the motor end plate by diffusion.
True False
Answer:
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