Aldosterone is a hormone secreted by the adrenal gland that activates the receptor protein to turn on genes that control water and sodium flow in kidney cells. The kidney cells contain receptor cells with mutations. How will this impact the cellular response? The aldosterone signaling molecule will also become mutated.
The aldosterone signaling molecule will conform to bind to the receptor cells.
The downstream components will be altered and ultimately affect blood volume.
The downstream components will function as usual, even if the receptor protein is not activated.

i do agree with robert moses’ statements about wiping out cities that are an “impediment to new growth”. in order to have a positive community, the city must continue to grow either in terms of size or economics. therefore wiping out cities that restrict growth benefits the overall society and all the people living in it. similar to a social contract, i believe that if a person was to live in a community they must sacrifice some of their rights, in this case property, for the overall good of the people. as long as these people living in the cities are reimbursed and the purpose of wiping out the cities is to serve the public, there is no problem with robert moses’ core idea.

i would imagine your answer to be b.

i'm not could be wrong.

(also for future reference, their is an 'arts' category. : )