Structure of a Neurone

Structure of a Neurone

Label the structure of the neurone from 1-6, with 1 being the most top and 6 being the most bottom. Follow a left-right order while labelling.

1. Dendrite

2. Cell Body

3. Node of Ranvier

4. Axon

5. Myelin Sheath

6. Synaptic Knob

Explain the characteristics and function of the dendrite.

1. Short branches of the cell body

2. Receives nerve impulses from other neurones or the external environment to and sends them to the cell body

Explain the characteristics and function of the cell body.

1. Consists of a nucleus and many dendrites

2. Integrates signals

3. Coordinates metabolic activities

Explain the characteristics and function of the Node of Ranvier.

1. The part of the axon that is not insulated by myelin sheath

2. Speeds up the transmission of nerve impulses by allowing nerve impulses to jump from one node to the following node

Explain the characteristics and function of the axon.

1. Elongated branch of the cell body

2. Carries impulses out of the cell body to other neurones/effectors

Explain the characteristics and function of the myelin sheath.

1. Insulating membrane that coats the axon

2. Protects neurones from injury

3. Functions as an insulator for electrical impulses

4. Provides nutrients to the axon

Explain the characteristics and function of the synaptic knob.

1. Swelling at the end of the axon branch.

2. Sends signals to muscle cells, gland cells or other neurone dendrites