Membrane Potential

Question 1

What is the resting membrane potential of a neuron?

Answer 1

-70mV

Question 2

Is the ICF high in Na+ or K+?

Answer 2

K+

Question 3

What cells use movements of depolarisation and repolarisation as signals?

Answer 3

• Neurons

- Muscle Cells

Question 4

Is the ECF high in Na+ or K+

Answer 4

Na+

Question 5

Depolarisation occurs when what happens in regards to k+ or Na+ ions?

Answer 5

Na+ channels open and chemical + electrical gradient moves Na+ ions into the cells through passive transport which decreases the negativity

Question 6

Is the ICF more positively charged or negatively charged?

Answer 6

Negatively charged

Question 7

What occurs in relation to Na+ and K+ during repolarisation?

Answer 7

K+ ion channels open and chemical + electrical gradients mean the K+ ions leave the cell through passive diffusion