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.

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

The organ failure that occurs during the exhaustion phase of the general adaptation syndrome results from an inability to regulate plasma levels of ________.

Which of the following are haploid cells?I. primary oocyteII. secondary oocyteIII. oogoniumIV. ovum

The pituitary hormone that increases lean body mass is ________.