In smooth muscle cells that can produce action potentials, cell membrane depolarization usually opens voltage-sensitive sodium channels.
Indicate whether the statement is true or false.
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Question 2) A Ca2+-binding protein in smooth muscle is calmodulin.
Indicate whether the statement is true or false.
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Question 3) The decrease in mass and strength of muscle as a result of damage to the nerves innervating the muscle is called disuse atrophy.
Indicate whether the statement is true or false.
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Question 4) The larger the diameter of a skeletal muscle fiber, the greater the tension it can generate.
Indicate whether the statement is true or false.
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Question 5) Flexor muscles generally pull on bone and decrease the angle at a joint, whereas extensor muscles push the bone to increase the angle.
Indicate whether the statement is true or false.
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Question 6) Recruitment of different types of motor units in a muscle is one means of varying the amount of tension generated in that muscle.
Indicate whether the statement is true or false.
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Question 7) The shortening velocity of a skeletal muscle fiber increases with decreasing load because the rate at which the cross-bridge cycle can occur increases with decreasing load.
Indicate whether the statement is true or false.
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Question 8) The fiber type intermediate between the two extremes of fast-glycolytic and slow-oxidative is slow-glycolytic.
Indicate whether the statement is true or false.
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Question 9) Endurance exercise, such as long-distance swimming, causes a preferential increase in glycolytic enzymes and increased mass of the exercising muscles.
Indicate whether the statement is true or false.
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Question 10) Muscles used for delicate, finely controlled movements have smaller motor units than muscles used for high power activities.
Indicate whether the statement is true or false.
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