The small space between the sending neuron and the receiving neuron is the
A: Synaptic terminal.
B: Neurotransmitter
C: Calcium channel.
D: Synaptic cleft.
E: Vesicle
Answer:
The correct answer is option D.
Explanation:
The small space between the sending neuron and the receiving neuron is the synaptic cleft.

Synaptic cleft:
The synaptic cleft is the small space between the sending neuron and the receiving neuron.
It is a space that separates two neurons. It forms a junction between neurons and helps nerve impulses to pass from one neuron to the other.
A synaptic cleft is not just a space between two neurons; also, it acts as a junction by connecting two or more neurons.
It is present between two neurons; pre-junctional neuron or a pre-synaptic or and post-junctional neuron or a post-synaptic.
There are three types of the synaptic cleft, depending on the type of nerve fiber participating in the formation of the synapse, which are following;
- Axo-axonic synapse
- Axo-dendritic synapse
- Axo-somatic synapse
Here, the synaptic cleft is present between the cell body and axon. The axon of one neuron forms synapses with the cell body of the other neurons.