Blood vol. Control

[asutoshsahu]

Blood vol. Control

• Quote

Post by asutoshsahu » Sat Mar 11, 2006 7:27 am

I know that the ADH hormone secreted by the pituitary gland controls the water reabsorption in the DCT of nephron and controls the blood vol.

Another hormone Aldosteron secreted by adrenal gland controls the Na retentation by the blood .
Is this aldosteron hormone has any thing to do with the blood vol. control by making the urine concentrated or dilute?

[cardiorrhexis]

• Quote

Post by cardiorrhexis » Sat Mar 11, 2006 4:24 pm

Yes.

Low Na+ = less water reabsorbed = decrease in blood volume = low blood pressure = dilute urine

High Na+ = too much water reabsorbed = increase in blood volume = high blood pressure = concentrated urine