Question

Are neurotransmitter molecules released one at a time or in packets?

1) one at a time
2) in packets
3) both one at a time and in packets
4) neurotransmitters do not get released

Answer 1

Neurotransmitter molecules can be released one at a time or in packets in neurotransmission.

Step-by-step explanation:

In neurotransmission, neurotransmitter molecules are released from the presynaptic neuron into the synaptic cleft. These neurotransmitters can be released one at a time or in packets.

For example, acetylcholine (ACh) is a neurotransmitter that is released in packets. ACh molecules are stored in synaptic vesicles within the presynaptic neuron. When a signal arrives at the presynaptic neuron, these vesicles undergo exocytosis, releasing a packet of ACh molecules into the synaptic cleft.

On the other hand, neurotransmitters like dopamine can be released one at a time. Instead of being stored in synaptic vesicles, dopamine is produced in the presynaptic neuron and released directly into the synaptic cleft.