5.1 Hypothalamus and pituitary

hypothalamus and pituitary

What does growth hormone (GH) do

• Increases body cell size & division, enhances amino acid transport, promotes bone growth

growth hormone (GH) is controlled by

• Stimulated by GHRH (hypothalamus)

• Inhibited by somatostatin (SS)

What is the function of prolactin

• Maintains milk production; enhances LH effects in males

prolactin (PRL) is controlled by

• Inhibited by PIH (dopamine)

• May be stimulated by PRF (not well defined)

What does Thyroid-Stimulating Hormone (TSH) do

• Stimulates thyroid gland hormone secretion

Thyroid-Stimulating Hormone (TSH) is controlled by

• TRH from hypothalamus

Adrenocorticotropic Hormone (ACTH) the role →

• Stimulates adrenal cortex hormone secretion

Adrenocorticotropic Hormone (ACTH) is controlled by

CRH from hypothalamus

Follicle-Stimulating Hormone (FSH) function

• Females: Follicle development, estrogen secretion

• Males: Sperm production

Follicle-Stimulating Hormone (FSH) is controlled by

• GnRH from hypothalamus

What are the functions of Luteinizing Hormone (LH)?

• Stimulates sex hormone secretion (male & female)

• Triggers ovulation (egg release)

Luteinizing Hormone (LH) is controlled by

• GnRH from hypothalamus

Antidiuretic Hormone (ADH) role

• Reduces water excretion by kidneys

• Increases blood pressure (high levels)

Antidiuretic Hormone (ADH) is controlled by

• Hypothalamus (responds to fluid concentration & blood volume)

What are the functions of oxytocin?

• Uterine contractions during labor

• Milk ejection from mammary glands

oxytocin is controlled by

Hypothalamus (stimulated by uterine stretch & breastfeeding)