Final answer:
Energy deficits in hypothalamic amenorrhea suppress the secretion of GnRH, leading to reduced gonadal hormone production and potentially disrupting reproductive functions.
Step-by-step explanation:
Energy deficits that characterize hypothalamic amenorrhea appear to suppress Gonadotropin-releasing hormone (GnRH). The correct answer is (A) Suppress GnRH. GnRH is responsible for the stimulation of the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which are crucial for the regulation of hormone production in the gonads. When energy deficits occur, such as in cases of malnutrition or excessive exercise, the hypothalamus responds by reducing the secretion of GnRH to conserve energy, which can lead to decreased production of gonadal hormones, a condition known as hypothalamic amenorrhea. Additionally, hormones such as testosterone and inhibin, released from the gonads, play a role in inhibiting the secretion of GnRH by creating a negative feedback loop to regulate the hormone levels.