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Anatomy and Physiology Practice Test: Muscles and Muscle Tissue
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Anatomy and Physiology Practice Test: Muscles and Muscle Tissue
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25 Questions

1. What is the functional unit of a skeletal muscle called?
2. Which of the following would be recruited later in muscle stimulation when contractile strength increases?
3. During isometric contraction, the energy used appears as movement.
4. The force of muscle contraction is controlled by multiple motor unit summation or recruitment.
5. During isotonic contraction, the heavier the load, the faster the velocity of contraction.
6. The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.
7. The warm-up period required of athletes in order to bring their muscles to peak performance is called ________.
8. Which of the following is not a way muscle contractions can be graded?
9. Which of the following statements is false or incorrect?
10. A contraction in which the muscle does not shorten but its tension increases is called isometric.
11. Most skeletal muscles contain ________.
12. During muscle contraction, myosin cross bridges attach to which active sites?
13. Once a motor neuron has fired, all the muscle fibers in a muscle contract.
14. A motor neuron and all the muscle cells that it stimulates are referred to as a motor end plate.
15. An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments. When the level of calcium ions declines, sliding stops.
16. What is the role of calcium ions in muscle contraction?
17. Smooth muscles that act like skeletal muscles but are controlled by autonomic nerves and hormones are ________.
18. Muscle tone is the small amount of tautness or tension in the muscle due to weak, involuntary contractions of its motor units.
19. The giant protein titin maintains the organization of the ________ assisting in muscle stretching.
20. Which of the following describes the cells of single-unit visceral muscle?
21. During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________.
22. Single-unit smooth muscle is found in the intestines.
23. The term aponeurosis refers to ________.
24. An anaerobic metabolic pathway that results in the production of two net ATPs per glucose plus two pyruvic acid molecules is ________.
25. When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in length.

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