Selective attention is facilitated, enhanced, and improved by way of the ___ of the brainstem, which acts as the origin point of neurons, which project to the cerebraal cortex and release ___ neurotransmitter(s)
A. pons, acetylcholine
B. basal nuclei, dopamine
C. hypothalamus, serotonin
D. locus coeruleus, norepinephrine
E. thalamus, melatonin
D
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A by-product of anaerobic respiration in muscle fibers is
A. uric acid. B. pyruvate. C. oxygen. D. lactate. E. hydrochloric acid.
The part of the female reproductive cycle during which estrogen secretion reaches its highest level is:
a. menarche b. the secretory phase c. the proliferative phase d. menopause
The strength of a stimulus is coded by the ____
a. strength of action potentials b. frequency of action potentials c. duration of the resting period d. duration of the refractory periods e. frequency of salutatory periods
Inside the matrix of the mitochondria, pyruvate
A) is converted to acetyl CoA which requires energy from an NADH. B) requires the vitamin pantothenic acid for its conversion to acetyl CoA. C) gains a carbon in its conversion to acetyl CoA. D) is converted to lactate under anaerobic conditions.