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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________ 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
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).