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Exam 6: The Peripheral Nervous System: Afferent Division; Special Senses

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Question 111

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Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) a.Z line b.A band c.I band d.H zone -contains only thin filaments

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Question 112

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Fast-glycolytic muscle fibres do not require as much oxygen use as slow-oxidative fibres.

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B) False

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Question 113

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Match the skeletal muscle proteins, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) a.actin only b.myosin only c.actin and myosin d.troponin-tropomyosin complex e.actin, troponin, and tropomyosin f.actin, myosin, troponin, and tropomyosin -can bind with Ca²⁺ during contraction

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.slow-oxidative fibre b.fast-oxidative fibre c.fast-glycolytic fibre -produces the most lactic acid

Which of the following compounds binds with the calcium that enters the cell during smooth muscle excitation?

The contraction phase of a muscle cell lasts longer than the relaxation phase.

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

Match the muscle-tension receptors, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.muscle spindle b.Golgi tendon organ c.both of these receptors -provides information to motor regions of the brain

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) a.skeletal muscle only b.single-unit smooth muscle only c.cardiac muscle only d.skeletal muscle and cardiac muscle e.skeletal muscle and single-unit smooth muscle f.single-unit smooth muscle and cardiac muscle g.skeletal, single-unit smooth, and cardiac muscles -maintain(s) a constant resting membrane potential unless stimulated

What causes muscular fatigue?

Match the muscle-tension receptors, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.muscle spindle b.Golgi tendon organ c.both of these receptors -initiates a monosynaptic reflex

Match the types of muscles, labelled a. and b., with the characteristics. a.isometric contraction b.isotonic contraction -load exceeds muscle tension

If you wanted to pick up something heavier than your pencil, you would need to have a stronger muscle contraction. Which of these actions might accomplish this?

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.slow-oxidative fibre b.fast-oxidative fibre c.fast-glycolytic fibre -the most powerful fibre

Match the types of muscles, labelled a. and b., with the characteristics. a.isometric contraction b.isotonic contraction -important in maintaining posture

Which of these statements correctly describes intrafusal muscle fibres?

Slow-oxidative muscle fibres would be found in high density in the leg muscles of Olympic sprinters.

A motor unit is a single muscle plus all the motor neurons that innervate it.

ATP expenditure is required for both contraction and relaxation of a muscle fibre.

Which of these statements does NOT correctly describe cross bridges?