2. The reproductive cycle of a human is usually regulated by

1. gametes
2. hormones
3. natural selection
4. immune responses



Answer :

Final answer:

Hormones are essential in regulating the human reproductive cycle.


Explanation:

Hormones play a crucial role in regulating the reproductive cycle of humans. The interaction of hormones from the hypothalamus and anterior pituitary with hormones from reproductive tissues and organs controls the male and female reproductive cycles. The hypothalamus sends gonadotropin-releasing hormone (GnRH) to the pituitary gland when reproductive hormones are needed, initiating the reproductive processes.


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