OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Prepare for the OCR GCSE Biology Exam with detailed quizzes, flashcards, and explanations. Enhance your understanding of biology concepts and get exam-ready today!

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What is one of the primary functions of FSH in the menstrual cycle?

To initiate menstruation
To cause an egg to mature
To trigger ovulation
To produce progesterone

The correct answer is: To cause an egg to mature

Follicle stimulating hormone (FSH) plays a crucial role in the menstrual cycle, primarily by promoting the maturation of eggs in the ovaries. It is secreted by the pituitary gland and stimulates the growth and development of ovarian follicles, which contain the eggs. As these follicles mature, they produce estrogen, a hormone that prepares the uterine lining for potential implantation of a fertilized egg. The maturation of the egg is essential for ovulation to occur later in the cycle, which is when a mature egg is released from the ovary. Therefore, FSH is a key hormone that lays the groundwork for both the maturation of eggs and the overall regulation of the menstrual cycle. This function of FSH is particularly significant as it sets up the conditions necessary for successful reproduction.