Enhancing the excitability of a synapse so that transmission is favored along certain pathways is called ________.
A. excitotoxicity
B. summation
C. synaptic plasticity
D. long-term potentiation
Answer: D
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If there is a physiologic level of antidiuretic hormone in the bloodstream, then:
A) blood pressure decreases secondary to dilation of the vessels. B) the renal tubules are stimulated to reabsorb sodium and water. C) potassium, phosphorus, and magnesium are lost through diuresis. D) the kidneys excrete excessive sodium and water from the body.
Which type of reflex operates independently of the CNS?
A. Voluntary reflex B. Local reflex C. Conscious reflex D. Distal reflex
Nerve impulses involving pain stimuli travel along
A. myelinated axons. B. unmyelinated axons.
Endocrine cells in the duodenum secrete what hormone?
A. Pepsin B. Gastrin C. Pepsinogen D. Secretin