Question

What is the correct direction of flow of electrical impulses?

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The correct option is C

The correct option is C.

Explanation of the correct option:

An impulse is a series of electrical pulses traveling down the nerve fibre.

Correct flow of the electrical impulses:

Stimulus is received by the neuron's dendrite, which is transferred to the neuron's cell body. It is then transferred to the axon, from where it goes to the axon terminal and passes the stimulus to the next neuron through the synapse.

Explanations for the incorrect options:

Option A:

• The flow of electrical impulses does not occur from axon to cell body. It always happens from cell body to axon, so the first option is incorrect.

Option B:

• The information exchange always occurs between the dendrite of one neuron to the axon terminal of another neuron. But in this case, the dendrites of both neurons are in contact, so this option is incorrect.

Option D:

• The information exchange always occurs between the dendrite of one neuron and the axon terminal of another neuron. In this, both neurons have their axon terminal in contact, so this is incorrect.

Final Answer: C is the correct option that shows the transmission of a nerve impulse from dendrites to the axon terminal in a neuron and from the axon terminal of one neuron to the dendrites of another neuron.