Problem 1: A target cell for a certain hormone displayed a gradual increase in permeability of an ion, say ion E+ but NOT ion F-. Which of the following scenarios may best explain this increase?
a. Targer cell must have downregulated
b. Target cell must have upregulated.
c. Secretion of the hormone that in?uences this target cell has gradually increased.
Problem 2. Can you for certain state that the hormone is in hypersecretion? or hyposecretion?
Problem 3. How is it that hormones can alter permeablility of the target cell for one ion and not the other?