Question

Bipolar neurons occur in

• A. Vertebrate embryos
• B. Retina of eyes
• C. Brain and spinal cord
• D. Skeletal muscles

Answer 1

The correct option is B

Retina of eyes

The correct option is B.

Explanation of the correct option-

1. Bipolar neurons are nerve cells which have bipolar endings.
2. The cell body is present at the centre and with extensions on both sides of the cell, one at the axon and the other at the dendrite.
3. Bipolar neurons play a role in the sensory pathway and perception of sight as it is found in the retina of the eyes.
4. These cells pass gradual signals to the brain.

Explanation of the incorrect option-

Option A-

1. Bipolar neurons are present in the vertebrate embryo but as they grow it disintegrates.
2. They have multipolar neurons once they grow.

Option C-

1. The brain and spinal cord have multipolar neurons.
2. They possess a single axon with several symmetrically radiating dendrites.

Option D-

1. Skeletal muscles have unipolar neurons.
2. Unipolar neurons are the simplest neurons that contains a single extension that gives rise to branches.

Final answer: Bipolar neurons occur in the retina of the eyes