Neurotransmitter is being released at a synapse. Which of the following occurs last?
A. Calcium ions enter the presynaptic terminal.
B. Synaptic vesicles release neurotransmitter by exocytosis.
C. An action potential is produced in the postsynaptic membrane.
D. Neurotransmitter flows rapidly across the synaptic cleft.
E. Neurotransmitter binds with the receptor on the postsynaptic membrane.
C
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Formation of the neural tube
A. begins at the anterior (head) end and proceeds toward the posterior (tail). B. begins at the posterior and proceeds toward the anterior. C. is caused by compaction of the neural plate. D. begins in the middle and proceeds toward the head and the tail. E. is random in that it can begin and proceed at any location along the neural plate.
The peroneus brevis and longus are muscles that move the foot and toe. In which compartment are they located?
A. anterior B. posterior C. lateral D. None of the above
Which is FALSE about interneurons?
A. They sum excitatory and inhibitory synaptic inputs. B. They deliver synaptic input on other neurons. C. They can transmit information between afferent neurons and efferent neurons. D. They make synapses on effector organs in the PNS. E. They receive synaptic input from other neurons in the CNS.
Dendrites on unipolar neurons are parts of
A) interneurons. B) motor neurons. C) sensory neurons. D) efferent neurons.