A synapse is a (n) question 27 options:

a. chemical messenger that triggers muscle contractions.

b. automatic response to sensory input.

c. junction between a sending neuron and a receiving neuron.

d. neural cable containing many axons.

Answer;

C. junction between a sending neuron and a receiving neuron.

Explanation;

-Information or impulses from one neuron flows to another neuron across a synapse. The synapse contains a small gap separating neurons. The synapse consists of: a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles.

-The function of the synapse is to transfer electric activity (information) from one cell to another. The transfer can be from nerve to nerve (neuron-neuron), or nerve to muscle (neuro-myo).

The synapse is the junction present between two neurons.

In a synapse, the electric impulses are transferred in the form of chemical molecule, which is also known as neurotransmitter. The synapse receives the signals from the sender neuron also known as presynaptic neuron to the receiver neuron, also called as postsynaptic neuron.

Hence, the correct answer is option c. junction between a sending neuron and a receiving neuron.