Higher Human Biology 3.4 Cells of the Nervous System

Axons are surrounded by a

The myelin sheath insulate the axon. What effect does this have on the speed of impulse conduction?

• Increase

• Decrease

• Stay the same

Responses to stimuli in the first two years of life are not as rapid or co-ordinated as those of an older child. What has not yet occurred that causes this?

What cells produce the myelin sheath?

Certain diseases destroy the myelin sheath causing a loss of

What part of a cell of the nervous system receives an impulse?

• Dendrite

• Cell Body

• Axon

• Myelin Sheath

What part of a cell of the nervous system carries the impulse to the next synapse?

• Dendrite

• Cell Body

• Axon

• Myelin Sheath

What part of a cell of the nervous system carries stores the nucleus and other organelles?

• Dendrite

• Cell Body

• Axon

• Myelin Sheath

Neurons connect with other neurons or muscle fibres at a

What is stores in vesicles in the axon ending?