A defect of the ________ results in difficulty in visual detection of color.
A. lens
B. cones
C. rods
D. cones and rods
Answer: B
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Which of the following is false regarding acetylcholine?
A. It is rarely used in the body. B. It is the neurotransmitter used at the neuromuscular junction. C. It is stored and released by the presynaptic cell. D. It is synthesized from acetic acid and choline.
Mechanisms that do not help regulate blood pressure include ________.
A) nervous control that operates via reflex arcs involving baroreceptors, chemoreceptors, and higher brain centers B) the dural sinus reflex C) renal regulation via the renin-angiotensin system of vasoconstriction D) chemical controls such as atrial natriuretic peptide
Paul is getting ready to blow up a pool float because he can't find the air pump. He takes a big breath in after exhaling normally. The air he takes in is the ________.
A. vital capacity B. inspiratory capacity C. inspiratory reserve volume D. tidal volume
The thalamus, hypothalamus, and epithalamus collectively constitute the ________
A) cerebellum B) diencephalon interbrain C) brain stem D) cerebrum