Question

Question 1. The following questions are based on the information below, from a mutated nerve cell in the brain: I

nterstitial fluid intracellular fluid

Na+ 5mM 180mM

K+ 15mM 100mM

Ca2+ 300mM 6mM

Cl- 105mM 15mM

1) Calculate the equilibrium potentials for each ion.

2) From those values, predict the transport mechanism for each ion.

3) Which two ions are involved in establishing the resting potential?

4) Of those two ions, which has the greater permeability?

5) Which ion is responsible for the wave of depolarization in the action potential?

6) Which ion is responsible for the wave of repolarization?

Answer 1

Here , the calculate equilibrium potential of ions by the Nernst equation. The value came according to value of ions. In the nerve cell membrane , the transport mechanism is conducted by the cl ions it is a conductor. Potassium ion is responsible for wave of repolarization. Sodium ions is responsible for wave of depolarisation and both are greater permeable to membrane and both are involved in resting potential. Sodium ions in outside and potessium ions in inside of nerve cells .