QUESTION 21. In the following diagram, nerve cell A is commu-
nicating with nerve cell B. Identify the structures
present on the membranes of nerve cell B that
enable it to detect a message from nerve cell A.
E Nerve cell AVC
-Nerve cell B

The structures present on the membrane of nerve cell B that enable it to detect a message from nerve cell A are surface RECEPTORS.

Nerve cells communicate by releasing neurotransmitters into the synaptic cleft between them. Subsequently, these neurotransmitters can be picked up by the receiving neuron by using specific receptors localized on its surface.Some of the most common neurotransmitters that help nerve cells to communicate with each other include acetylcholine (Ach), serotonin, dopamine and glutamate.

In conclusion, the structures present on the membrane of nerve cell B that enable it to detect a message from nerve cell A are surface RECEPTORS.

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