Chapter 3 AP and synapse

Question 1

Loss of positive charges (or gain of negative charges) makes the inside of the cell more negative

Answer 1

Hyperpolarization

Question 2

Cell returns to its resting membrane potential

Answer 2

Repolarization

Question 3

The membrane potential moves from -70 mV to -60 mV

Answer 3

Depolarization

Question 4

Anion channels open causing the membrane potential to become more negative

Answer 4

Hyperpolarization

Question 5

Sodium ion channels open causing the membrane potential to become more positive

Answer 5

Depolarization

Question 6

An inhibitory postsynaptic potential (IPSP) promotes this change in membrane potential

Answer 6

Hyperpolarization

Question 7

Potassium leak channels and the Na+/K+ pump restore resting membrane potential after action potential

Answer 7

Repolarization

Question 8

The membrane potential of the postsynaptic neuron moves closer to threshold during an excitatory postsynaptic potential (EPSP).

Answer 8

Depolarization

Question 9

Glycine and GABA open chloride ion channels and cause this change in membrane potential

Answer 9

Hyperpolarization

Question 10

A strong local potential moves the membrane potential to -55 mV

Answer 10

Depolarization

Question 11

what is the primary factor in the maintenance of a cell’s negative charge during resting membrane potential?

Answer 11

leak channels

Question 12

Bidirectional, instantaneous synaptic transmission is typical of __________.

Answer 12

electrical synapses