Membrane Transport Proteins

Question 1

What is the difference between primary and secondary active transport?

Answer 1

Primary utilises ATP energy

Secondary utilises an ionic gradient for energy

Question 2

What do the drugs oubain/digitoxin/digoxin do?

Answer 2

Target the Na/K ATPase channels to increase intracellular sodium channels

This as an effect inhibits the sodium calcium exchanged therefore more Ca remains in the muscle to increase contractility (inotropy)