Which is true of interneurons?
A. They detect stimuli.
B. They receive and send signals.
C. They control muscles.
D. They control glands.
E. They have a long axon.
Answer: B
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a. NA+ enter; K+ leave b. NA+ leave; K+ enter c. NA+ leave; NA+ enter d. K+ enter; NA+ leave e. K+ leave; NA+ enter