Action potentials

Question 1

what is resting membrane potential?

Answer 1

refers to the difference in electrical charge between the inside and outside of the cell.

Question 2

what molecules are involved in creating the membrane potential?

Answer 2

• potassium.
• calcium.

Question 3

what figure expresses resting membrane potential?

Answer 3

negative 70mV.

Question 4

what is the refractory period?

Answer 4

• follows repolarisation.
• during this period no nerve is fired.
• there is more potassium left in the cell, making it more negatively charged.

Question 5

what is saletory conduction?

Answer 5

• refers to the jumping of an action potential at nodes of Ranvier.
• only occurs along myelinated axons.
• the greater the distance between nodes, the faster the conduction is.