Organic compounds always contain ________ atoms.
A. oxygen
B. carbon
C. water
D. nitrogen
Answer: B
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How do the testes respond to exposure to excessive body warmth?
A) They move away from the pelvic cavity. B) Excessive warmth is actually beneficial in that it speeds up the maturation of sperm. C) They move close to the pelvic cavity. D) Excessive warmth has no effect on the testicles because of their location in the scrotum.
The overall functioning of the ANS contributes to
a. conservation of energy resources when stress levels are low b. mobilization of energy reserves when stress levels are high c. suppression of non-vital activities when stress levels are high d. homeostasis e. all of the above
All of the following are true about fast-twitch fibers except
A) high amount of myoglobin B) rapid contraction C) break down ATP rapidly D) fewer mitochondria than slow-twitch fibers
The optic disc is known as the blind spot because:
A) only cones populate the optic disc. B) photoreceptors are absent from the optic disc. C) only rods populate the optic disc. D) the fovea centralis prevents light from striking the optic disc.