During synaptic transmission across a typical synapse, which action occurs?
A) Sodium ions flow into the membrane of the presynaptic neuron.
B) The binding of neurotransmitters triggers the release of potassium ions by the presynaptic neuron.
C) Vesicles containing neurotransmitter molecules diffuse to the receiving neuron's plasma membrane.
D) Neurotransmitter molecules bind to receptors on the postsynaptic membrane.
D
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Water passes through lipid bilayers (select all correct choices):
A. directly by diffusion. B. through aquaporins by facilitated diffusion. C. through protein pumps and active transport. D. through gap junctions. E. through hemidesmosomes.
Water that organisms gain in the synthesis of ATP is termed ____ water.
A. metabolic B. biochemical C. recovered D. condensation E. None of the choices for this question are correct.
The spaces that separate adjacent Schwann cells are
a. neuroglia. b. myelin sheaths. c. nodes. d. dendrites. e. synapses.
Digestion begins in the
A) small intestine. B) oral cavity. C) esophagus. D) stomach.