The following are related to granulosa cells except :
**Core Concept**
Granulosa cells are a type of somatic cell found in the ovary, playing a crucial role in the development and maintenance of the ovarian follicle. They are responsible for producing and secreting various hormones, including estrogen and progesterone, which regulate the menstrual cycle and pregnancy.
**Why the Correct Answer is Right**
Granulosa cells surround the oocyte within the follicle and produce estrogen in response to follicle-stimulating hormone (FSH) from the pituitary gland. Estrogen then stimulates the growth and thickening of the endometrium in preparation for potential pregnancy. The correct answer is related to the function of granulosa cells in producing hormones that regulate the menstrual cycle and pregnancy.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is related to theca cells, which are also found in the ovary and produce androgens that are converted to estrogen by granulosa cells. However, they are not a type of granulosa cell.
* **Option B:** This option is incorrect because it is related to the role of granulosa cells in producing progesterone, which is a hormone produced by granulosa cells in response to luteinizing hormone (LH) from the pituitary gland.
* **Option C:** This option is incorrect because it is related to the role of granulosa cells in producing inhibin, which is a hormone produced by granulosa cells that inhibits the production of FSH by the pituitary gland.
**Clinical Pearl / High-Yield Fact**
A key clinical correlation is that granulosa cell tumors, which are rare ovarian tumors, can produce estrogen and lead to endometrial hyperplasia and cancer. This is an important consideration in the evaluation and management of ovarian tumors.
**Correct Answer: D.**