Compared to slow-twitch fibers, fast-twitch muscle fibers generally have _______.
A. more mitochondria
B. a higher glycolytic capacity
C. more myoglobin
D. two of the above
Ans: B. a higher glycolytic capacity
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The trachea divides into ________ bronchi that lead to the lungs
A) 2 B) 3 C) 4 D) 5
When you are exposed to bright light, a reflex is initiated and your iris constricts to decrease pupil size. Which structure serves as a receptor in this system?
A. The iris B. The brain's visual cortex C. The retina D. The eyelid
Lymph nodes are centers for the production of ________, which act against foreign particles carried in lymph.
Fill in the blank(s) with the appropriate word(s).
________ involves the alteration of peripheral resistance by acting directly on precapillary sphincters.
A) ANP release B) Autoregulation C) Chemoreceptor reflex D) Renin release E) Baroreceptor reflex