NEET > Biology Class 12 > Human Reproduction One Shot (NCERT) - 2
Human Reproduction One Shot (NCERT) - 2 Video Lecture - Biology Class 12 - NEET
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FAQs on Human Reproduction One Shot (NCERT) - 2 Video Lecture - Biology Class 12 - NEET
| 1. What are the different stages of human reproduction? |  |
Ans. Human reproduction consists of several stages, including gametogenesis, fertilization, implantation, embryonic development, and fetal development. Gametogenesis involves the formation of gametes (sperm and eggs) through meiosis. Fertilization occurs when a sperm cell fuses with an egg cell to form a zygote. Implantation refers to the attachment of the embryo to the uterine wall. Embryonic development involves the formation of different tissues and organs from the embryo. Fetal development is the stage where the organs continue to grow and mature until birth.
| 2. How does the male reproductive system function? | |
Ans. The male reproductive system consists of the testes, epididymis, vas deferens, seminal vesicles, prostate gland, and penis. The testes produce sperm through the process of spermatogenesis. The sperm then mature and are stored in the epididymis. During ejaculation, the sperm travel through the vas deferens and mix with fluids from the seminal vesicles and prostate gland to form semen. The semen is then released through the penis during sexual intercourse to fertilize the female egg.
| 3. What is the role of hormones in human reproduction? | |
Ans. Hormones play a crucial role in human reproduction. In males, the hormone testosterone is responsible for the development of male reproductive organs and the production of sperm. In females, the hormones estrogen and progesterone regulate the menstrual cycle, promote the development of female reproductive organs, and prepare the uterus for pregnancy. Additionally, hormones such as follicle-stimulating hormone (FSH) and luteinizing hormone (LH) control the maturation and release of eggs from the ovaries.
| 4. How does fertilization occur in humans? | |
Ans. Fertilization in humans occurs when a sperm cell penetrates and fuses with an egg cell. This typically happens in the fallopian tubes. When a male ejaculates, millions of sperm are released into the female reproductive tract. The sperm then swim through the cervix, uterus, and into the fallopian tubes. If an egg is present in the fallopian tube, one sperm can penetrate the outer layer of the egg and fuse with it, forming a zygote. This process of fertilization combines the genetic material from both the sperm and egg, resulting in the formation of a new individual.
| 5. What is the significance of implantation in human reproduction? | |
Ans. Implantation is a crucial step in human reproduction as it allows the embryo to establish a connection with the mother's body for nourishment and support. After fertilization, the developing embryo travels down the fallopian tube and reaches the uterus. It then attaches itself to the uterine wall and begins to receive nutrients from the mother's bloodstream. Implantation also triggers the release of hormones that maintain pregnancy and prevent menstruation. Without successful implantation, pregnancy cannot occur.
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