Question

The type of neurons present in the peripheral nervous system:

• A. Apolar
• B. Unipolar
• C. Bipolar
• D. Ganglia

Hint:

In insect neurophysiology:
- PNS sensory neurons = Bipolar.
- CNS motor/interneurons = Unipolar.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The insect nervous system consists of the central nervous system (CNS), visceral nervous system, and peripheral nervous system (PNS).
Neurons are classified structurally based on the number of cytoplasmic processes extending from their cell bodies.

Step 2: Detailed Explanation:
- Central Nervous System (CNS) Neurons: Almost all interneurons and motor neurons in the CNS are unipolar (having a single process that branches).
- Peripheral Nervous System (PNS) Neurons: Sensory neurons associated with peripheral sensilla (like touch, chemical, or temperature receptors) are typically bipolar (having one distal dendrite connected to the receptor and one proximal axon running to the CNS).

Step 3: Final Answer:
The type of neurons present in the peripheral nervous system is Bipolar, which is option (C).