*On Demand by Aspirants...!!!🌀🌀* *⭕NURSING OFFICER* *MCQ QUIZ NO: 306* *⭕Series: Maha Ratainale* *⭕Date: 08/02/2025* *⭕Sub: Endocrine-3 (A&P With MSN-46* *⭕Day: Saturday* *1.Ans D* Galactopoiesis means formation and production of human milk by prolactin, mammogenesis means development of breasts to a functional state and Galactokinesis means milk ejection (letdown reflex) by oxytocin. Prolactin helps into production of milk by alveolar or acinar cells of breast alveoli. Its high level in the blood during pregnancy also stimulates the growth and development of the mammary tissue to prepare for lactation. *2.Ans C* Refer MCQ No 1 *3.Ans D* During breast feeding, due to suckling response on breast by baby, the level of both oxytocin and prolactin are increase. Oxytocin cause "let down reflex or milk ejection reflex" and prolactin cause "milk secretion reflex". *4.Ans D* Refer MCQ No 3 *5.Ans C* During breast feeding level of oxytocin (which cause let down reflex and nipple erection) and prolactin (which cause milk secretion by acini cells of breast) are increased. During breast feeding level of estrogen and progesterone remain decreased. *6.Ans A* Refer MCQ No 5 *7.Ans B* An excess secretion of prolactin called hyperprolactinemia which cause amenorrhea & galactorrhea in female and erection dysfunction (impotence) and decrease libido in male. *8.Ans C* Thyroid gland is a largest endocrine gland located in the center of the base of the neck on the thyroid cartilage of larynx. *9.Ans B* Thyroid gland is the first endocrine gland to develop, on about 24th day of gestation. *10.Ans A* Adam's apple is the laryngeal prominence formed by the thyroid cartilage at the top of the trachea into the front of the neck. It is more prominent in adult men than in women due to influence of testosterone hormone. *11.Ans A* Refer MCQ No 8 *12.Ans B* Refer MCQ No 10 *13.Ans B* In the absence of iodine thyroid gland become ineffective, because iodine is essential for synthesize of T; and T4 hormone *14.Ans B* Deficiency of iodine cause decrease synthesis of thyroid hormone (hypothyroidism) which leads to increased secretion of TSH. Because increased level of TSH cause increased growth (goiter) and activity of thyroid gland. *15.Ans A* Iodine is part of the hormones triiodothyronine (T3) and tetraiodothyronine (T4) or thyroxine. *16.Ans B* Refer MCQ No 15 *17.Ans D* Refer MCQ No 15 *18.Ans A* Thyroid hormones (T3 & T4) are responsible to increased production of cellular proteins (causes growth and development), basal metabolic rate (BMR), peristalsis and activities of sympathetic nervous system. *19.Ans B* Calcitonin is a hormone that is produced by parafollicular cells or C (clear) cells of the thyroid gland. It involved in regulating blood calcium level by lowering it (causing hypocalcemia) by deposing calcium from blood to bone, so it also important for maintaining a dense, strong bone matrix. *20.Ans A* Refer MCQ No 19 *Regards:* *Maha Nursing ✍️ 🏆*