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Course: AP®︎/College Biology > Unit 4

Lesson 1: Cell communication
Science
AP®︎/College Biology
Cell communication and cell cycle
Cell communication
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Cell communication

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Problem

A presynaptic cell is shown with 3 vesicles and inside the vesicles are 3 small balls labeled neurotransmitter. Two of the vesicles are shown at the end of the presynaptic cell releasing neurotransmitters into a space labeled synapse. On the other side of the space the postsynaptic cell is labeled, and there are protrusions on the postsynaptic cell labeled that the neurotransmitter is sitting on. The structure is labeled neurotransmitter attached to receptor.
Image credit: Adapted from CNX OpenStax [CC BY 4.0], via Wikimedia Commons
Which of the following best describes the cell communication occurring in the figure above?
Choose 1 answer: