Identify in diagrams and images sensory, relay and motor neurones

SouravNovember 14, 2024

Answer

The identification of sensory, relay, and motor neurones can be illustrated through diagrams and images that highlight their distinct structures and functions within the nervous system. Here’s a description of each type of neuron:

Sensory Neurons

• Function: Sensory neurons are responsible for carrying signals from sensory receptors (such as those in the skin, eyes, ears, and nose) to the central nervous system (CNS). They convert external stimuli into electrical impulses.
• Structure:
  • Typically have a pseudounipolar structure, where a single axon splits into two branches: one extending to the sensory receptor and the other leading to the CNS.
  • They possess long dendrites and short axons.

Sensory Neuron Diagram

Relay Neurons

• Function: Relay neurons, also known as interneurons, connect sensory neurons to motor neurons within the CNS. They process information and facilitate communication between different parts of the nervous system.
• Structure:
  • Typically have a multipolar structure with many dendrites and a single axon.
  • Found primarily in the brain and spinal cord, they have short axons and short dendrites.

Relay Neuron Diagram

Motor Neurons

• Function: Motor neurons transmit signals from the CNS to muscles or glands, facilitating movement or secretion. They are responsible for executing responses based on processed information.
• Structure:
  • Also generally multipolar, with a long axon that extends from the CNS to target muscles or glands.
  • They have short dendrites and long axons.

Motor Neuron Diagram

Summary Table