Detects and coordinates a response to changes in internal or external environment.

Senses a change in the environment, such as a change in light or temperature.

The change in the environment, such as a sound, touch or light.

A nerve cell which transmits electrical impulses between different parts of the body.

A muscle or gland which carries out a response.

The human nervous system

Biology

Neurones and synapses

The structure and function of a reflex arc

The human eye

Common defects of the human eye

The human brain

Damage and disease in the human brain, including CT and PET scanning

Pupils will learn how hormones and glands of the human endocrine system enable us to coordinate and control changes in our bodies.

Pupils learned how substances essential for chemical reactions in living cells, and the products of the reactions, are transported into, around and out of the human body, and the implications of surface area:volume ratio.

This unit explores the structure and function of the nervous system, including the CNS, reflex arcs, and the eye. It covers brain structure, common eye defects, and the challenges in treating nervous system damage. It also addresses ethical considerations.

Coordination and control: the human nervous system

The part of a neurone which carries the signal.

A fatty coating on the neurone which insulates it.

A chemical transmitter which crosses the synapse and triggers the onward response.

Something that occurs without you realising or controlling it.

An involuntary, fast neural response to a situation.

The fixed neural pathway that controls the reflex response.

An intermediate neurone that sits within the central nervous system.

An object that can focus light rays. In the eye, it brings light rays to focus on the retina.

Occurs when light travels from one transparent medium to another, causing a change in direction.

The process of bringing light rays together to converge at a single point creating a clear image.

The point where rays of light meet after passing through a lens.

The back of the eye which senses light brightness and colour.

The organ which controls responses to the internal and external environments.

The part of the brain responsible for conscious thoughts and responses.

The part of the brain responsible for conscious movement.

The part of the brain responsible for unconscious control of the body.

relates to whether an action and its consequences are right or wrong

consent obtained from a patient where they fully understand the procedure and its implications

a type of cell division that produces genetically identical cells

a cell that can differentiate into specialised cells

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Coordination and control: the human nervous system

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