The ________ surround(s) the male urethra and secrete(s) a thick, clear, alkaline mucus known as pre-ejaculate.

Which of the following is an immunosuppressive hormone that is secreted in response to stress?

The uterus ________.

In females, FSH stimulates ________ cells to produce ________.

Which enzyme cleaves phosphatidylinositol 4,5-bisphosphate (PIP2) into diacylglycerol (DAG) and inositol trisphosphate (IP3)?

Leptin ________.

Renin is produced by the ________.

PTH is classified as a(n) ________ and binds to ________ receptors.

Which of the following is a catecholamine?

Thyroid hormone is classified as a(n) ________ and binds to ________ receptors.