Assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y and

Question

Assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y and Z.

question 1 part 1) If presynaptic neuron X is stimulated, the postsynaptic cell membrane becomes slightly hyperpolarized. What kind of a synapse is involved between presynaptic neuron X and the postsynaptic neuron?

a) Excitatory synapse.

b) Inhibitory synapse.

c) It could be either an excitatory or an inhibitory synapse.

d) Collateral axoaxonic.

e) Insufficient information is given to know what kind of synapse is involved.

Question 1 part 2: If presynaptic neuron Y is stimulated, the postsynaptic cell membrane becomes slightly depolarized. What kind of synapse is involved between presynaptic neuron Y and postsynaptic neuron?

a) Excitatory synapse.

b) Inhibitory synapse.

c) It could be either an excitatory or an inhibitory synapse.

d) Collateral axoaxonic.

e) Insufficient information is given to know what kind of synapse is involved.

Explanation / Answer

1. part 1-

Option a is correct.

An excitatory synapse is a synapse in which an action potential in presynaptic neuron increase the probability of an action potential occurring in post synaptic cell.

1. Part 2- option a is correct, it is also an example of excitatory synapse.

Neurons from networks through which nerve impulses travel, each neuron after making numerous connection with other cell.

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