Question

Which choice best characterizes K+ leakage channels? View Available Hint(s)

A. chemically gated K+ channels that open and close according to the binding of other molecules
B. transmembrane channels that use energy to allow the movement of K+ across the membrane
C. transmembrane protein channels that are always open to allow K+ to cross the membrane without the additional input of energy
D. common transmembrane channels that are always open for any ion to move through in the presence of K+

Answer 1

Answer:

C. Trans-membrane protein channels that are always open to allow K+ to cross the membrane without the additional input of energy

Explanation:

As we know that K+ leakage channels indicate the Potassium leakage channel. The best characterizes about K+ leakage channels is that there is a Trans-membrane protein channel which is always open to allow K+ to cross the membrane without the additional input of energy.

Actually when a cell dies its membrane potential gets more positive and finally reaches zero .

The key point is that the cells spend energy to maintain the intra-cellular ionic concentrations constant.

The membrane permeability of K+ is much  higher than the membrane permeability of Na+.

Therefore, the correct choice is option (C).