When a neurotransmitter released from one neuron binds to a ________ on a second neuron, that neuron depolarizes and fires.
A. enzyme-linked receptor
B. ligand-gated ion channel
C. voltage-gated ion channel
D. nuclear receptor
E. G-protein coupled receptor
Answer: B
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The type of movement that is specific and requires carrier molecules and energy is
A. exocytosis. B. facilitated diffusion. C. active transport. D. endocytosis. E. osmosis.
. Eutherian mammals are uniquely defined by
A. having a placenta. B. longer gestation periods because of more highly developed placentas. C. having fur. D. the young developing in a pouch. E. laying eggs.
The correct sequence of stages in mitosis is
a. interphase, prophase, metaphase, anaphase, telophase. b. prophase, metaphase, anaphase, telophase. c. metaphase, anaphase, prophase, telophase. d. prophase, telophase, anaphase, interphase.
During protein synthesis, ________ occurs in the nucleus as a copy of DNA is made into mRNA, and ________ begins in the cytoplasm, when mRNA associates with a ribosome.
What will be an ideal response?