Quiz questions that will be on the exam
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| show | False
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| What two molecules participate in cross-bridge interactions? | show 🗑
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| One motor neuron, plus all the muscle fibers it innervates, is known as a(n): | show 🗑
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| True or False: Twitch summation results primarily from a sustained elevation in cytosolic Ca2+. | show 🗑
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| What phenomenon enables smooth muscle to maintain tension with comparatively less ATP consumption, as compared to skeletal muscle? | show 🗑
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| show | False
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| True or False: Muscles that produce precise, delicate movements have fewer muscle fibers in their motor units compared to muscles made for powerful movements. | show 🗑
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| What happens when two or more overlapping action potentials are “added” together within a muscle? | show 🗑
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| show | Myosin
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| show | Origin
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| Premotor and supplementary motor areas, with input from the ____________________, plan the voluntary motor command that is issued to the appropriate motor neurons by the primary motor cortex through a descending system. | show 🗑
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| show | True
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| show | False
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| What types of muscles are involuntary in terms of movement? | show 🗑
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| What is the first source for supplying additional ATP when exercise begins? | show 🗑
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| show | Lengthens
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| True or False: Tropomyosin molecules are threadlike proteins that lie end to end alongside the groove of the actin spiral. | show 🗑
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| show | False
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| A single ____________________ pulls the thin filament inward only a small percentage of the total shortening distance. | show 🗑
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| Because of skeletal constraints, what is the maximum percentage that muscles can stretch or shorten relative to their length? | show 🗑
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| show | Spherical
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| True or False: Unlike skeletal muscle cells, a single smooth muscle cell extends the full length of a muscle. | show 🗑
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| True or False: In contrast to muscle spindles, which lie in the tendons of muscle, Golgi tendon organs are in the belly of muscle. | show 🗑
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| A skeletal muscle fiber contains numerous ____________________, which are cylindrical intracellular structures. | show 🗑
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| Lacking sarcomeres, smooth muscle does not have Z lines, but it does have ____________________ containing the same protein constituent found in Z lines. | show 🗑
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| Damage to the cerebellum or basal nuclei results in ____. | show 🗑
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| A(n) ____________________ is a rigid structure capable of moving around a pivot point known as a(n) fulcrum. | show 🗑
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| show | Myosin
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| show | Sarcomeres
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| show | Gamma
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| True or False: During the recovery period, fresh supplies of ATP are formed by oxidative phosphorylation using the newly acquired oxygen, which is provided by the sustained increase in breathing after exercise has stopped. | show 🗑
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| show | True
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| What are the three main muscle types? | show 🗑
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| show | transverse tubules and sarcoplasmic reticulum
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| What hormone, elevated during exercise, increases oxygen consumption? | show 🗑
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| show | Voluntary
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| show | Stretch
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| True or False: Disuse atrophy occurs when a muscle is not used for a long period of time due to reduced or absent nerve supply. | show 🗑
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| show | Calcium ions (Ca2+)
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| What are the two types of fast-twitch muscle fibers? | show 🗑
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| show | True
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| show | Myoglobin
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| In a(n) ____________________ contraction, the muscle is prevented from shortening, so tension develops at constant muscle length. | show 🗑
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| Smooth muscle myosin can interact with actin only when the light chain is ____________________. | show 🗑
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| show | ATP
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