Quiz questions that will be on the exam
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| True or False: Ca2+ binding to tropomyosin causes myosin to change shape, physically moving it away from its blocking position. | show 🗑
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| show | Actin and Myosin
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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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| True or False: A smooth muscle cell has many T tubules and well developed sarcoplasmic reticulum. | show 🗑
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| show | True
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| What happens when two or more overlapping action potentials are “added” together within a muscle? | show 🗑
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| Which molecule binds ATP in order for muscle contraction to occur? | show 🗑
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| The end of the muscle attached to the more stationary part of the skeleton is called the ____________________. | show 🗑
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| show | Cerebrocerebellum
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| True or False: The crossed extensor reflex is a postural reflex that ensures that the opposite limb is in a position to bear the weight of the body as the injured limb is withdrawn from the stimulus. | show 🗑
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| True or False: Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together. | show 🗑
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| show | cardiac and smooth
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| What is the first source for supplying additional ATP when exercise begins? | show 🗑
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| With eccentric contractions, the muscle ____________________. | show 🗑
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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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| show | Power Stroke
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| show | 30%
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| What shape are actin molecules? | show 🗑
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| show | False
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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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| show | Myofibrils
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| show | Dense Bodies
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| show | Clumsy movement
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| show | Lever
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| show | Myosin
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| Muscle tension is produced internally within the ____. | show 🗑
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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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| True or False: Viewed with an electron microscope, a myofibril displays alternating dark bands (the A bands) and light bands (the I bands). | show 🗑
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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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| The patellar tendon, or knee-jerk, reflex is a type of ____________________ reflex. | show 🗑
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| show | False
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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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| True or False: Muscles are categorized as striated (skeletal and cardiac muscle) or unstriated (smooth muscle). | show 🗑
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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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| show | Phosphorylated
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| show | ATP
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Created by:
hadland.j