Despite their similar appearance, in what way are Ulva structures different from leaves?
a. They are unicellular.
b. They do not contain chlorophyll.
c. They do not contain differentiated cells.
d. They do not contain cellulose.
c. They do not contain differentiated cells.
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Categorize the circumstances under which the same substance (molecule) can be either an electron donor or an electron acceptor
What will be an ideal response?
The deactivation and metabolism of serotonin
a. involves removal from the cleft by COMT. b. can be increased by SSRIs like Prozac. c. is selectively affected by the neurotoxin MDMA. d. yields the metabolite 5-HIAA. e. All of the above
The spaces that separate adjacent Schwann cells are called
a. neuroglia. b. myelin sheaths. c. nodes. d. dendrites. e. synapses.
A neuron maintains a resting potential primarily because ______ ions leak out of the cell, causing the inside of the cell membrane to become ________ charged with respect to the outside.
A. potassium/negatively B. potassium/positively C. sodium/negatively D. sodium/positively