Class 12 Biology Important Chapter 3 Human Reproduction Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Biology Important Solutions in English and select need one. AHSEC Class 12 Biology Additional Notes Download PDF. HS 2nd Year Biology Additional Solutions.
Class 12 Biology Important Chapter 3 Human Reproduction
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 12 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Biology Important Solutions English Medium for All Chapters, You can practice these here.
Human Reproduction
Chapter: 3
| IMPORTANT QUESTION AND ANSWER |
Answer the Following Question:
1. What is morula?
Ans: Morula is the 16-cell stage of the embryo formed by cleavage of the zygote before blastocyst formation.
2. What is spermiation?
Ans: Spermiation is the process where mature spermatozoa are released from the Sertoli cells into the lumen of seminiferous tubules
3. What is the function of fimbriae in the female reproductive system?
Ans: Fimbriae are finger-like projections at the end of the fallopian tubes that help in capturing the ovum after ovulation and guide it into the oviduct.
4. Where does fertilisation occur in the human female body?
Ans: Fertilisation typically occurs in the ampullary-isthmic junction of the fallopian tube.
5. What is the function of Sertoli cells?
Ans: Sertoli cells provide nourishment and structural support to the developing spermatids during spermatogenesis.
6. Which hormone causes ovulation in females?
Ans: Luteinizing Hormone (LH) surge triggers ovulation.
7. What is colostrum and why is it important?
Ans: Colostrum is the first milk secreted after parturition, rich in antibodies (mainly IgA), providing immunity to the newborn.
8. What are the phases of the menstrual cycle?
Ans: The menstrual cycle includes menstrual phase, follicular phase, ovulation, and luteal phase.
9. What is the function of the placenta?
Ans: The placenta facilitates the exchange of nutrients, gases, and wastes between the mother and fetus and also acts as an endocrine gland.
10. What are Graafian follicles?
Ans: Graafian follicle is the mature ovarian follicle that ruptures to release the ovum during ovulation.
11. What is the significance of the zona pellucida?
Ans: Zona pellucida is a glycoprotein membrane surrounding the oocyte that facilitates sperm binding and blocks polyspermy after fertilisation.
12. Write the functions of the placenta.
Ans: (i) Facilitates the exchange of oxygen and nutrients from mother to fetus.
(ii) Removes carbon dioxide and wastes from fetal blood.
(iii) Produces hormones like hCG, hPL, progesterone, and estrogen.
(iv) Acts as an immunological barrier protecting the fetus.
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