The adrenal cortex is part of the autonomic nervous system
Indicate whether the statement is true or false.
FALSE
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________ cells produce estrogen in the ovaries.
What will be an ideal response?
In a neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to
a) rapid uptake of the ACh into the myofiber. b) endocytosis of the ACh receptor into the myofiber. c) rapid destruction of ACh in the synaptic cleft by acetylcholinesterase. d) rapid destruction of ACh in the synaptic cleft by monoamine oxidase. e) diffusion of the ACh out of the synaptic cleft.
An action potential results from which of the following?
A. The exocytosis of potassium ions B. The diffusion of ions across the plasma membrane of the axon C. The diffusion of neurotransmitters across the plasma membrane D. The endocytosis of neurotransmitters E. The diffusion of ions across the plasma membrane in the neurosoma
What is the relationship between myelin and the propagation speed of action potentials?
A) The presence of myelin slows the propagation speed of action potentials. B) The presence of myelin speeds up the graded depolarization but does not affect the propagation speed of action potentials. C) The presence of myelin increases the propagation speed of action potentials. D) The presence of myelin does not affect the speed of action potentials. E) The presence of myelin blocks the propagation of action potentials.