Question 1

Which part of the neurone secretes myelin?

Accepted Answer

Schwann cell

Answer

Node of Ranvier

Answer

Axon

Answer

Dendrite

Question 2

Sensory neurones transmit impulses from...

Accepted Answer

A receptor to an intermediate or motor neurone

Answer

An intermediate neurone to a receptor

Answer

An effector to an intermediate neurone

Answer

One neurone to another

Question 3

The sodium potassium pump in an axon membrane moves....

Accepted Answer

3 sodium ions out and 2 potassium ions in

Answer

2 sodium ions in and 3 potassium ions out

Answer

2 sodium ions out and 3 potassium ions in

Answer

3 sodium ions in and 2 potassium ions out

Question 4

At rest an axon membrane is said to be....

Accepted Answer

Polarised

Answer

Hyperpolarised

Answer

Repolarised

Answer

Depolarised

Question 5

The resting membrane potential difference measures about

Accepted Answer

-65mv

Answer

+65mv

Answer

+40mv

Answer

-40mv

Question 6

The movement of which ions causes depolarisation?

Accepted Answer

Sodium ions in

Answer

Potassium ions in

Answer

Sodium ions out

Answer

Potassium ions out

Question 7

Ion channels in the axon membrane are ....

Accepted Answer

Voltage gated

Answer

Chemical gated

Answer

Stretch mediated

Answer

Pressure gated

Question 8

Which of these does NOT increase the speed of the action potential?

Accepted Answer

A smaller diameter axon

Answer

A larger diameter axon

Answer

Presence of a myelin sheath

Answer

Increase in temperature

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