What effect does the parasympathetic nervous system have on heart rate?
A) at first decreases, then increases heart rate
B) no effect on heart rate
C) decreases heart rate
D) increases heart rate
Answer: C
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The distal end of the tibia articulates with the
A) talus. B) fibula. C) patella. D) calcaneus. E) navicular.
A network of intracellular canaliculi and abundant microvilli are ultrastructural features of:
a. Chief cells of the gastric epithelium b. Enteroendocrine cells of the small intestine c. Surface mucous cells of the gastric epithelium d. Paneth cells of the small intestine e. Parietal cells of the gastric epithelium
The atomic number of an atom is equal to the number of:
a. electrons b. neutrons c. protons d. both B and C above
Osmosis is the movement of water
a. using a carrier-mediated transport mechanism. b. down a solute's concentration gradient. c. down its own concentration gradient. d. across a membrane irrespective of concentration gradients. e. across a membrane down its own concentration gradient.