In __________ diabetes the pancreas is NOT producing insulin.

Correct Answer: A

Rationale: Type I diabetes involves autoimmune destruction of insulin-producing beta cells.

Correct Answer: A

Rationale: Sweat glands are exocrine, releasing sweat through ducts, unlike endocrine glands (adrenal, thyroid, pituitary) which secrete hormones into the bloodstream.

Correct Answer: D

Rationale: Although the high circulating levels of estrogen stimulate prolactin secretion during pregnancy, the action of prolactin on the breast is inhibited by progesterone and estrogen. After parturition, progesterone and estrogen levels decrease dramatically. Prolactin can then interact with its receptors in the breast, and lactation proceeds if initiated by suckling.

Correct Answer: B

Rationale: Hormones act via receptors on target cells, not in blood or lymph nodes; they vary chemically.

Correct Answer: C

Rationale: Steroids are lipophilic and diffuse out immediately after synthesis.