What would most likely lead to an inhibitory postsynaptic potential (IPSP)?
A) opening of calcium ion channels
B) closure of chloride ion channels
C) opening of sodium ion channels
D) opening of potassium ion channels
Answer: D
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When ice skating at Rockefeller Center, a young skater got thoroughly chilled. Which of his body's reaction to the cold gave him "goose pimples"?
A. Faster subcutaneous blood flow B. Dehydration of his skin surface by cold C. His skin hairs pulling his skin muscles together D. Contraction of erector muscles in his skin
Positive feedback mechanisms usually produce
A. long-term changes. B. unstable conditions. C. stable conditions around a set point. D. changes returning values toward a set point.
Describe the controls over secretion of minero- and gluco-corticoids
What will be an ideal response?
Which valve regulates flow between the right ventricle and the pulmonary trunk?
A) pulmonary semilunar B) aortic semilunar valve C) tricuspid valve D) mitral valve