Question

FSH is to estrogen as LH is to

• A. Vasopressin
• B. Testosterone
• C. Progesterone
• D. LTH

Answer 1

Answer: (C)

Progesterone

FSH is secreted by the anterior pituitary gland. It stimulates growth, development, and hormonal secretion of Graafian follicle and ovum maturation. Developing follicles secrete estrogen which in turn causes endometrium thickening during the proliferative phase of menstrual cycle. LH is also secreted by the anterior pituitary which inhibits secretion of FSH, stimulate maturation and rupture of Graafian follicle and release of ovum. Ovulation is followed by secretory phase/luteal phase in the uterus (day 15-28) and is marked by uterine endometrium thickening, under influence of progesterone as secreted by corpus luteum, to prepare it for implantation. Thus, option C is correct. LTH (luteotropic hormone/prolactin) is secreted by the anterior pituitary gland and targets mammary gland to stimulate breast development and milk production after baby birth. Hence, option D is incorrect. Vasopressin/antidiuretic hormone (ADH) is secreted by the posterior pituitary gland and targets nephrons to increase water reabsorption and thereby decreasing water content in urine. Option A is incorrect. Option B is incorrect as testosterone is male sex hormone while estrogen and progesterone are female sex hormones. The correct answer is C.