In twitch summation, the muscle fiber
a. is stimulated again before the fibers returns to resting potential.
b. is stimulated again before it completely returns to resting position.
c. contracts stronger but stronger action potentials do not occur.
d. experiences a and b
e. experiences b and c
E
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The gap junctions in cardiac muscle are part of specialized cell junctions that are localized to the ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is/are not true regarding human muscles?
A) Most have both slow and fast fibers. B) Slow fibers are abundant in the calf muscles. C) Eye muscles are composed entirely of fast fibers. D) Slow fibers are abundant in the back muscles. E) Fast fibers are high in myoglobin.
Sully is involved in a car accident in which he is rear-ended. The traumatic hyperextension of his head caused
A. whiplash. B. a fracture. C. scoliosis. D. a herniated disc. E. spina bifida.
The ring of cartilage that forms the base of the larynx is the
A. epiglottis. B. thyroid cartilage. C. cricoid cartilage. D. arytenoid cartilage. E. cuneiform cartilage.