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Anatomy 6.2 - Transmission of Nerve Impulses

Total questions: 11

Worksheet time: 6mins

Name
Class
Date
1.

In the resting phase of the axon during an impulse conduction, the outside of the axon has a positive charge while the inside of the axon has a negative charge. this resting state is also called -

a)

polarized

b)

insulated

c)

depolarized

d)

conductive

2.

When a stimulus approaches the axon, it opens up channels to allow what chemical ion to flow into the axon?

a)

sodium

b)

iron

c)

potassium

d)

calcium

3.

When the chemical ions enter the axon, the charges flip and the outside now becomes negative and the inside positive. This is known as -

a)

polarization

b)

conductivity

c)

depolarization

d)

insulation

4.

To return back to the normal resting phase, a channel on the axon membrane opens up and allows what chemical ion to escape from the axon?

a)

sodium

b)

calcium

c)

potassium

d)

iron

5.

Returning back to the resting phase is called -

a)

polarization

b)

conductivity

c)

depolarization

d)

repolarization

6.

The time between the completion of the impulse and repolarization is called the -

a)

polarization

b)

refractory period

c)

completion

d)

impulse delay

7.

The ability of a neuron (axon) to transmit a nerve impulse is called -

a)

reflexes

b)

polarization

c)

depolarization

d)

conductivity

8.

When the action potential impulse is traveling down the axon and it "jumps over" the myleninated sections of the axon to make the impulse move faster, this is known as -

a)

impulse momentum

b)

electric current

c)

saltatory conduction

d)

nodes of Ranvier

9.

Which of the following will be the slowest moving nerve impulse?

a)

an axon covered with mylein sheaths (schwann cells)

b)

a large diameter axon

c)

an axon in warmer than normal temperatures

d)

unmyleinated axons

10.

This type of reflex involves the stimulation of skeletal muscles

a)

somatic

b)

parasympathetic

c)

autonomic

d)

sympathetic

11.

This type of reflex is one where it sends involuntary stimuli to the cardiac muscle and smooth muscles of the internal organs.

a)

somatic

b)

parasympathetic

c)

autonomic

d)

sympathetic