FREE ANATOMY AND STUDY GAMES ABOUT 9 EXAM

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FREE ANATOMY AND STUDY GAMES ABOUT 9 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -74 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The binding of acetylcholine molecules to acetylcholine receptors would lead to all of the following except

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sodium would leave the muscle cell.Question 2: The type of muscle contraction in which the muscle fibers produce increased tension but the muscle neither shortens nor lengthens is called

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isometric.

Question 3: The space between the neuron and the muscle is the

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synaptic cleft.Question 4: "Cross bridges" that link between the thick and thin filaments are formed by the

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globular head of thick filaments

Question 5: At maximal stimulus the muscle is contracting at full strength

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True

Question 6: Each skeletal muscle fiber is controlled by a neuron at a single

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neuromuscular junction

Question 7: the following characteristics is unique to smooth muscle?

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the absence of striations.Question 8: Interactions between actin and myosin filaments of the sarcomere are responsible for

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muscle contraction Question 9: The dense layer of collagen fibers that surround an entire skeletal muscle is the

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epimysium Question 10: the following statements about "indirect attachments" of muscle is incorrect?

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The epimysium of the muscle fuses with the periosteum of the bone.Question 11: The alternating contraction and relaxation of opposing layers of smooth muscle is referred to as

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peristalsis Question 12: What would happen if the calcium level in the sarcoplasm was kept high?

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The cell would calcify and die

Question 13: the following muscles is voluntary?

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the muscle that extends the arm at the elbow Question 14: the following events is something a smooth muscle can do but cardiac and skeletal muscle can not do?

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Grow by hyperplasia or an increase in the number of cells.Question 15: In the initial stages of repolarization the ionic conditions are restored returning the membrane to its resting potential.

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False

Question 16: The plasma membrane of a muscle cell is known as the

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sarcolemma.

Question 17: What is the cause of rigor mortis

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Calcium influx into the cell after death causes rigor mortis.

Question 18: All of the following are functions of muscle EXCEPT

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protection Question 19: The skeletal muscle complex known as the triad consists of the transverse tubule and the terminal cisternae

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True Question 20: As an axon enters a muscle, it branches into a number of axonal terminals, each of which forms a neuromuscular junction with a single muscle fiber. A motor neuron and all the muscle fibers it supplies is called a

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motor unit

Question 21: Cardiac muscle control is voluntary.

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False Question 22: What is the ion released from the terminal cisternae that combines with troponin and removes the blocking action of tropomyosin, resulting in formation of cross bridges?

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Ca2+

Question 23: An entire skeletal muscle is surrounded by

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epimysium

Question 24: Unlike cardiac and smooth muscle, skeletal muscle

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must be stimulated by nerve endings to initiate contraction.

Question 25: Ca++ is essential for skeletal muscle contraction

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False Question 26: Lactic acid is an end product of anaerobic fermentation that causes muscle fatigue.

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True Question 27: During the recovery period following exercise, the body's need for oxygen is increased.

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True Question 28: The sequence of electrical changes that occurs along the sarcolemma when a muscle fiber is stimulated is known as the

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action potential.