Membrane Potential Flashcards
1
Q
What is the resting membrane potential of a neuron?
A
-70mV
2
Q
Is the ICF high in Na+ or K+?
A
K+
3
Q
What cells use movements of depolarisation and repolarisation as signals?
A
- Neurons
- Muscle Cells
4
Q
Is the ECF high in Na+ or K+
A
Na+
5
Q
Depolarisation occurs when what happens in regards to k+ or Na+ ions?
A
Na+ channels open and chemical + electrical gradient moves Na+ ions into the cells through passive transport which decreases the negativity
6
Q
Is the ICF more positively charged or negatively charged?
A
Negatively charged
7
Q
What occurs in relation to Na+ and K+ during repolarisation?
A
K+ ion channels open and chemical + electrical gradients mean the K+ ions leave the cell through passive diffusion
