The active sites to which cross-bridges attach are found on the
A. myosin myofilaments.
B. sarcoplasmic reticulum.
C. Z disks.
D. T tubules.
E. actin myofilaments.
Answer: E
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The number of chromosomes in a secondary oocyte is
A. less than the number in a polar body. B. the same as the number in a mature sperm. C. greater than the number in a polar body. D. greater than the number in a mature sperm. E. less than the number in a mature sperm.
Explain the role of the endolymph of the semicircular canals in activating the receptors during angular motion
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Fast myosin ATPase activity is typical of which type of skeletal muscle fibers?
A. Type I B. Type II
The type of smooth muscle contraction occurring in the esophagus during swallowing is called:
A. peristalsis. B. mass movement. C. segmentation. D. distension. E. eccentric.