C2.2: Neural Signalling

What are the main factors that maintain a neuron’s resting potential?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

The diagram shows a process that occurs in the membranes of neurons during a stage of the action potential. What process does the diagram depict?

• Open sodium channels initiating depolarisation.

• The sodium/potassium pump initiating depolarisation.

• Open sodium channels restoring the resting potential.

• The sodium/potassium pump restoring the resting potential.

Which statement explains why a nerve impulse is electrical?

• It releases hormones from glands into the bloodstream

• Neurotransmitters carry electrical charge between neurons

• Electrons jump from node to node as electrical signals are transferred across neurons

• It involves the movement of positively charged ions

Which are correct reasons for a negative resting potential in a neuron?

• I only

• I and II only

• II and III only

• I, II and III

Tags

NGSS.HS-LS1-3

What mode of transport do neurotransmitters use to travel across the synaptic cleft?

• Exocytosis

• Simple diffusion

• Active transport

• Facilitated diffusion