Which nucleus stimulates the muscles to produce the pattern of arm and leg movements associated with walking?
A. Globus pallidus
B. Caudate nucleus
C. Amygdaloid body
D. Putamen
E. Claustrum
Answer: B
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What happens to the oxygen that is metabolized within the mitochondria?
A) The oxygen is combined with hydrogen to form water. B) The oxygen is converted to CO2 and is combined with hydrogen to form water. C) The oxygen is converted to CO2. D) The oxygen is incorporated into organic molecules during cellular metabolism. E) The oxygen acts as a coenzyme in the production of ATP.
Why are eyelashes shorter than terminal hairs on the scalp?
A) The growth stage of an eyelash is shorter. B) The vascular supply of the eyebrow follicle is much less than that of the hair follicle on the scalp. C) Hormones in the eyebrow follicle turn off growth after it has reached a predetermined length. D) Eyelashes grow slower than terminal hairs.
If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,
A) synaptic transmission would fail. B) release of neurotransmitter would stop. C) smaller action potentials would result. D) repolarization of the cell would stop. E) more action potentials would occur.
The lipid portion of a cell's plasma membrane constitutes a barrier to current
Indicate whether the statement is true or false.