Neurons

Neurons are specialized cells that are fundamental building blocks of the nervous system.

Anatomy of Neurons

Neurons consist of three main parts:

  1. Dendrites: These are the branch-like extensions that receive signals from other neurons or sensory receptors.
  2. Cell Body: Also known as the soma, it contains the nucleus and other essential cell organelles.
  3. Axon: A long, slender projection that transmits electrical impulses away from the neuron’s cell body towards other neurons, muscles, or glands.

Function of Neurons

Neurons are responsible for:

  • Receiving sensory input from the environment or other neurons.
  • Processing and integrating the received information.
  • Transmitting electrical signals known as action potentials to communicate with other neurons or target cells.

Types of Neurons

There are three main types of neurons:

  1. Sensory Neurons: These neurons carry sensory information from sensory receptors to the central nervous system (CNS).
  2. Interneurons: Found exclusively within the CNS, these neurons facilitate communication between sensory and motor neurons.
  3. Motor Neurons: These neurons carry signals from the CNS to muscles or glands, resulting in appropriate motor responses.