Gonads, Thymus & Pineal Gland

What hormone from the ovaries helps regulate the menstrual cycle?

Estrogen

What hormone from the ovaries helps maintain pregnancy and prepares the uterus?

Progesterone

What hormone from the ovaries prepares the breasts for milk production?

Estrogen (with help from progesterone)

What hormone from the ovaries relaxes the uterus and pelvic joints during pregnancy?

Relaxin

What hormone from the ovaries inhibits FSH to prevent too many eggs from maturing?

Inhibin

What is the main hormone made by the testes?

Testosterone

What does testosterone do in the male body?

Develops sperm, builds muscle, deepens voice, grows body hair

What two pituitary hormones stimulate the gonads?

Follicle-Stimulating Hormone) and LH (Luteinizing Hormone)

Which pituitary hormone causes ovulation in females?

(Luteinizing Hormone)

Which pituitary hormone stimulates egg and sperm production?

Follicle-Stimulating Hormone

What hormone does the thymus secrete?

Thymosin

What does thymosin do?

Helps T cells (immune cells) mature and multiply.

Where is the thymus located?

In the chest, behind the sternum (shrinks after puberty).

What hormone does the pineal gland produce?

Melatonin

What does melatonin do?

Helps regulate the sleep-wake cycle (circadian rhythm).

Where is the pineal gland located?

In the brain, attached to the roof of the third ventricle.