Module 7 - Cerebrovascular Accident Care

Question 1

What is a neuron’s source of ATP? How does this differ from other cell types?

Answer 1

Glucose. This differs because the ONLY source of ATP for a neuron is glucose while other cell types can obtain ATP via the breakdown of other molecules.

Question 2

What are the typical membrane potentials for each stage of the action potential (resting, depolarization, peak, hyperpolarization)?

Answer 2

Resting: -70 mV

Depolarization: -55 mV

Peak: +40 mV

Hyperpolarization: -90 mV

Question 3

What takes place at a synapse?

Answer 3

Neurotransmitters are released to the next neuron across the synaptic cleft.

Question 4

What is an afferent nerve?

Answer 4

A bundle of neurons carrying sensory information from the body to the spinal cord.

Question 5

What is an efferent nerve?

Answer 5

A bundle of neurons carrying motor instructions from the brain to the body (muscles and glands)