题目内容

Which of the following best describes a neurotransmitter?以下哪一项最能描述神经递质？

A neurotransmitter is like a lock that fits into a special key.
B. A neurotransmitter is the space between the pre- and post-synaptic cleft.
C. A neurotransmitter is like a key that fits into a lock (the receptor).
D. All of the above are correct.

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True or False? All neurons have only one dendrite.所有神经元只有一个枝晶。

A. TRUE
B. FLASE

True or false? Lipofuscin is an organelle that digests old and damaged cell components.脂褐素是一种细胞器，可以消化旧的和受损的细胞成分。

A. TRUE
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A. dendrite.
B. nissle body.
C. synaptic end bulb.
D. axon.

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A. multipolar.
B. bipolar.
C. unipolar.
D. pseudounipolar.