Question

Nissls granules are absent in

• A. Axon
• B. Dendron
• C. Soma
• D. All of the above

Answer 1

The correct option is A

Axon

The correct option is A.

Explanation for the correct option:

Option A:

1. Neurons are the functional unit of the nervous system.
2. It enables the transmission of information from one nerve cell to another.
3. A big granular body observed in neurons is referred to as a neuron.
4. These granules are of the rough ER and are the site of protein synthesis.
5. They assist in protein synthesis in neurons and the proteins are utilized in intracellular mechanisms.
6. An axon is the tubular method of the nerve cell, that consists of impulses far far away from the cell body.
7. It arises from the cyton on the axon hillock. Here Nissl's granules are absent.
8. Axon can not synthesize its protein therefore it relies upon soma.

Explanation for the incorrect options:

Option B:

1. Dendrites are branched protoplasmic extensions of a nerve cell that helps in the propagation of the electrochemical stimulation to the cell body, or soma.
2. Nissl's granules are present in the dendron.

Option C:

1. The soma also called a cell body of a neuron contains the nucleus and other structures common to living cells.
2. Nissl's granules are present in the soma.

Final answer: Nissls granules are absent in Axon.