AL Neurones and synapses

State the fatty substance formed by Schwann cells

Which of the following applies if the potential difference across the membrane of a neurone is -70mV

• Threshold potential

• Action potential

• Resting potential

• Depolarization

State the process that involves the jumping of an action potential from one node of Ranvier to the next

Which of the following involves the rapid reversal of the potential difference across the membrane of a neurone?

• Depolarisation

• Refractory period

• Threshold potential

• Saltatory conduction

State the type of synapse that use ACh as a neurotransmitter

Identify the ion that moves into the presynaptic neurone to stimulate vesicles

• Sodium

• Potassium

• Chloride

• Calcium

Identify the structure in the image

Identify the type of reaction catalysed by acetylcholinesterase

• Anabolic

• Hydrolysis

• Condensation

• Reduction

Identify the term that describe a neurone only initiating a nerve impulse if the stimulus is sufficient

• Repolarisation

• All-or-none law

• Refractory period

• Depolarisation

Identify the process responsible for the release of a neurotransmitter

• Endocytosis

• Diffusion

• Facilitated diffusion

• Exocytosis