The reason that the steroid hormone aldosterone affects only a small number of cells in the body is that

Only small number of the cells in the body are the target cell for the aldosteron

Explanation:

Target cell for a certain hormone is a cell that have hormone receptor specific for that hormone. There are two main types of receptors on target cell:

Hormone binding to the receptor leads to the signal cascade within the cell, which results in cell response.

The aldosterone mineralocorticoid receptors are nuclear receptors mostly located in the kidneys.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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