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Melatonin ________.

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

________ binds to intracellular calcium release channels and releases calcium from intracellular stores.

Which hormone does NOT increase blood volume and/or blood pressure?

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

Renin is produced by the ________.

During puberty, egg cells do not complete meiotic division. Division pauses at ________ arrested in ________.

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

In females, LH stimulates ________ cells to produce ________.

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