Presynaptic neurons release neurotransmitters by ______________
A) active transport.
B) exocytosis.
C) diffusion.
D) endocytosis.
B
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Respiratory alkalosis can be
A. caused by anything that decreases breathing rate. B. characterized by muscle paralysis. C. compensated for by a increased secretion of bases by the kidneys. D. compensated for by a decreased respiratory rate.
Fluid contained within a minor calyx is called urine
Indicate whether this statement is true or false.
Which of the following does not stimulate insulin secretion?
a. elevated blood amino acid concentration. b. gastrointestinal hormones. c. a fast-food hamburger. d. starvation. e. elevated blood glucose concentration.
Muscle cells have positively charged ____ ions in greater concentration outside the muscle cell than inside the cell
a. sodium b. potassium c. chloride d. calcium