IGCSE 0610 Biology (2026-2028) - Chapter 14 Coordination and Response

What does the mammalian nervous system consist of?

Central Nervous System (CNS) and the peripheral nervous system (PNS)

Describe the Central Nervous System (CNS)

It consists of the brain and spinal cord, which are the areas of coordination

What is the role of the nervous system?

Coordination and regulation of body functions

Describe the peripheral nervous system (PNS)

Comprises of nerves and neurones that coordinate and regulate body functions

Where do electrical impulses travel

Electrical impulses travel through the neurones

What is a neurone?

A neurone is a specialised nerve cell that is adapted to transmit nerve impulses around the body.

Nerve Impulse

An electrical signal that passes along the nerve cells called neurones

Axons

Long nerve fibres of a neurone that carry nerve impulses away from the cell body

Dendrites

Dendrites are short extensions of a neurone that carry nerve impulses towards the cell body.

Identify this neurone and its function

Sensory Neurone. It carries impulses from the sense organs (sensory receptors) to the CNS