PP4 Resting Ps

Question 1

What is the name of the equation that works out the potential of an ion?

Answer 1

Nernst Equation

Question 2

What is Z in “an equation”

Answer 2

The valence of an ion

Question 3

Define depolarisation?

Answer 3

The INSIDE of the cell becomes LESS NEGATIVE. Less difference between concs inside and outside so there is a DECREASE in MEMBRANE POTENTIAL

Question 4

Define hyperpolarisation?

Answer 4

The INSIDE of the cell becomes MORE NEGATIVE. Caused by the NA/K ATPase pump restoring resting concentrations

Question 5

Define repolarisation?

Answer 5

The INSIDE of the cell becomes LESS POSITIVE.

Increase in difference between concs inside and outside so there is a INCREASE in MEMBRANE POTENTIAL

Question 6

How long is an action potential?

Answer 6

100 miliseconds

Question 7

EqNa+ =

Answer 7

+70mV

Question 8

Eq K+ =

Answer 8

-95mV

Question 9

Eq Ca2+

Answer 9

+122mV

Question 10

Eq Cl-

Answer 10

-96mV

Question 11

Whats the name of the equation that fits the whole membrane potentials?

Answer 11

Goldman-Hodgkin-Katz

Question 12

What are the three types of gating?

Answer 12

1) Volatge (ACh, Serotonin)
2) Ligand
3) Mechanical

Question 13

Name two excitatory transmitters

Answer 13

Acetylcholine, Glutamate, Dopamine

Question 14

Name an inhibitory transmitters

Answer 14

Glycine, γ-aminobutyric acid (GABA)