4.1-4.5

Question 0

What are the two ions that are of interest in understanding the resting potential of neurons? Are these ions negatively or positively charged?

Answer 0

Sodium ions (NA+) and potassium ions (K+) both positive

Question 1

How does Pinel define ions?

Answer 1

Positively and negatively charged particles

Question 2

What is the resting potential of neurons?

Answer 2

-70Mv

Question 3

How do ions pass through membrane between inside and outside of neuron?

Answer 3

Through sodium and potassium ion channels/pumps

Question 4

What is generated at the axon hillock, the structure at the junction between the cell body and the axon

Answer 4

Action potentials

Question 5

Action potentials are produced and conducted through ______ or ion channels that open or close in response to changes in response to changes in level of membrane potential

Answer 5

Axon initial segment

Question 6

To result in a change in the postsynaptic neuron, a neurotransmitter must do what?

Answer 6

Depolarize

Question 7

Define ligand

Answer 7

Any molecule that binds to another

Question 8

Define exocytosis

Answer 8

The process of neurotransmitters release

Question 9

Which refractory period refers to the period after an action potential when it is impossible to elicit a second action potential?

Answer 9

The absolute refractory period

Question 10

Which refractory period refers to a period of time when an action potential is possible only if there is a higher than normal stimulation?

Answer 10

A relative refractory period

Question 11

Both small and large neurotransmitters are packages and stored where before being released in the synapse?

Answer 11

Golgi complex