Question

An INHIBITORY signal is sent between neurons when __________ rushes into the neuron.

Answer 1

An INHIBITORY Signal is sent between neurons when (A)Na+ rushes into the neuron.

Explanation:

• When one spot of membrane supports an action potential, lots of \text {Na}^+Na+start text, N, a, end text, start superscript, plus, end superscript ions hurry into the cell by that spot.

• These ions radiated out sideways into the cell and can depolarize a nearby spot of membrane, stimulating the hole of voltage-gated sodium channels and causing the nearby spot to support its action potential.

• The action potential can only move in one direction – from the cell body towards the axon terminal – because a spot of membrane that has just experienced one action potential is in a “refractory period” and cannot withstand another.

Answer 2

An INHIBITORY signal is sent between neurons when Cl- rushes into the neuron.

Explanation:

Inhibitory signal essentially pushes or slows the neuron’s brakes and inhibits the threshold to trigger an action potential.  

Inhibitory signal occurs at synaptic membranes of neurons when neurotransmitters like GABA are released at the inhibitory synapses triggers an inhibitory postsynaptic potential. The neurotransmitter binds with Cl- ions and rushes the cl- ions into the neurons and hyperpolarizes the synaptic membrane. This will inhibit the neuron’s threshold to trigger an action potential.