Pepsin would have the greatest activity ________.
A. when the pH of the chyme is greater than 3
B. if someone fasted for hours prior to eating
C. when the pH of the chyme is less than 3
D. if someone ate a primarily carbohydrate meal
Answer: C
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Which embryonic germ layer forms the brain and spinal cord?
A) ectoderm B) endoderm C) trophoderm D) epiderm E) mesooderm
Homeostasis is the process by which the body maintains its __________ conditions in response to changes in __________ conditions.
Peripheral ; visceral External ; external External ; internal Internal ; external
The nephron is responsible for maintaining _______.
A) electrolyte balance in the body B) acid-base balance in the body C) fluid balance in the body D) all of the above
Within a kidney, which of the following vessels is found in the greatest number?
A. Interlobar arteries B. Cortical radiate arteries C. Arcuate arteries D. Afferent arterioles E. Renal arteries