A cation has a(n)  charge.

What is the role of alveolar macrophages?

The hypothalamus is functionally and anatomically connected to the posterior pituitary lobe by a bridge of .

Hormones produced by the thymus play a role in the ___

How many hormones are produced by the posterior pituitary?

What are the female gonads called?

The end result of the RAAS is to .

Which portion of the ECG corresponds to repolarization of the atria?

Endocrine glands .

What happens to the urine excreted by the fetus when the kidneys begin to function?