For each hormone A–E, select the best option from the following list of functions

A. Option 4 Stimulates melanin formation in melanocytes. Melanocyte-stimulating hormone results in a darker pigmentation of the skin.

B. Option 2 Polypeptide growth factors secreted by the liver. Their production is stimulated by the action of growth hormone on hepatic cells. Somatomedins interact with growth hormone and affect growth, cartilage and protein metabolism.

C. Option 1 Causes milk ejection in the lactating breast. It is also important in causing the uterus to contract at parturition. D. Option 5 Promotes water retention in the kidney. Also known as antidiuretic hormone, vasopressin affects the permeability of certain parts of the renal tubule to allow greater reabsorption of water filtered in the glomerulus.

E. Option 3 Stimulates sperm formation in the male. In the female, LH stimulates ovu-lation and luteinization of the corpus luteum.