Kaplan MCAT Biology Review by Kaplan

Author:Kaplan [Kaplan]
Language: eng
Format: epub
Publisher: Kaplan Test Prep
Published: 2010-08-01T04:00:00+00:00

Mineralocorticoids

Considering the name of this class of hormones, we can predict that mineralocorticoids will help us to keep a healthy mineral balance. And they do, in fact, control salt balance in coordination with the kidneys. You should recall the mineralocorticoid that we discussed in Chapter 11: Aldosterone causes increased reabsorption of sodium and thereby water. The increased sodium and water leads to expansion of the blood volume and a higher blood pressure. Aldosterone can also affect the levels of potassium and hydrogen ions. It enhances the secretion of these two atoms into the tubule. What will be the net result of this movement? Potassium and hydrogen will be excreted from the body in the urine.

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