14-17, Matching 14. Sarcomere a) cell membrane of a muscle cell 15. Sarcoplasmic
ID: 3522525 • Letter: 1
Question
14-17, Matching
14. Sarcomere a) cell membrane of a muscle cell
15. Sarcoplasmic reticulum b) cytoplasm of a muscle cell
16. Sarcolemma c) smooth ER of a muscle cell
17. Sarcoplasm d) functional unit of a muscle
18. This end of a muscle is more distal and does move when the muscle contracts:
a) origin b) insertion
19. The movements our body makes in everyday life we complete this/these types of muscular contractions:
a) positive only
b) negative only
c) isometric only
d) a combination of positive, negative and isometric
20. The more action potentials per second delivered to the sarcolemma as in muscular tetanus then the more calcium released from the sarcoplasmic reticulum into the sarcomere and then the:
a) more binding sites on actin exposed
b) more cross bridges will attach from thick to thin myofilament
c) more force will develop in the contraction
d) a smoother, stronger contraction will result
e) all of the above
21. This end of a muscle is more proximal and does not move when the muscle contracts:
a) origin b) insertion
Explanation / Answer
14. Sarcomere: d) functional unit of a muscle
15. Sarcoplasmic reticulum: c) smooth ER of a muscle cell
16. Sarcolemma: a) cell membrane of a muscle cell
17. Sarcoplasm: b) cytoplasm of a muscle cell
18. The insertion region of the muscle moves during contraction.
19. Our daily life involves a combination of positive, negative and isometric muscle contractions.
20. Option E is correct.
21. The origin end of a muscle is more proximal and does not move when the muscle contracts.
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