Lecture 69

Question 1

For resting membrane potential, if you increase the extracellular [K], you _____ the membrane.

Answer 1

DEPOLARIZE

Question 2

_____ is the term that describes the notion that a slow depolarization will not lead to an action potential because Na channels have time to inactivate and K channels have time to open.

Answer 2

ACCOMMODATION

Question 3

During the _____ refractory period, it is NOT possible to generate an AP, while during the _____ refractory period, you CAN generate another AP, but it will be harder to do so.

Answer 3

ABSOLUTE refractory it is NOT possible to generate an AP, while during the RELATIVE refractory period you CAN generate an AP

Question 4

For cardiac action potentials, there is an influx of _____ as well as Na+, which is what causes the plateau during the repolarization phase.

Answer 4

Ca++