In reuptake
A) a neuropeptide breaks down into amino acids, which act as neurotransmitters.
B) an action potential reverses direction.
C) a neurotransmitter that has already been released into the synaptic cleft is taken
back into the synaptic knob of the presynaptic neuron or into nearby neuroglia or
neurons.
D) an enzyme breaks down a neurotransmitter and then another enzyme builds it back
up.
C
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Down syndrome is the result of
A. incomplete capacitation. B. improper crossing over. C. nondisjunction. D. improper implantation. E. disassociation.
The fetal portion of the placenta forms from the
A. inner cell mass. B. chorion. C. yolk sac. D. blastocoel. E. amnion.
Each mandibular condyle articulates with a mandibular _________ of the temporal bone.
Fill in the blank(s) with the appropriate word(s).
The fulcrum is in the middle of a __________-class lever
Fill in the blank(s) with the appropriate word(s).