Reproduction — Set 1
Biology · प्रजनन · Questions 1–10 of 50
What is the primary site of fertilization in the human female reproductive system?
Correct Answer: D. Fallopian tube
Fertilization typically occurs in the ampulla region of the fallopian tube. The sperm meets the ovum here to form a zygote. This tube connects the ovaries to the uterus.
The process of release of a mature egg from the ovary is known as?
Correct Answer: D. Ovulation
Ovulation occurs roughly in the middle of the menstrual cycle. A surge in Luteinizing Hormone (LH) triggers this release. The egg then travels toward the uterus for potential fertilization.
Which structure provides nutrition to the developing fetus inside the mother's womb?
Correct Answer: A. Placenta
The placenta is a temporary organ that facilitates nutrient and oxygen exchange between mother and fetus. It also removes waste products like carbon dioxide from the fetal blood. It is connected to the fetus via the umbilical cord.
What is the typical duration of the human gestation period in weeks?
Correct Answer: C. 40 weeks
A full-term human pregnancy generally lasts about 40 weeks from the last menstrual period. This is equivalent to roughly nine calendar months. This period is divided into three stages called trimesters.
In which part of the male reproductive system are sperm cells produced?
Correct Answer: A. Testes
Sperm production takes place in the seminiferous tubules located within the testes. The process of producing these cells is called spermatogenesis. These glands are located outside the abdominal cavity in the scrotum to maintain a lower temperature.
The onset of the menstrual cycle in human females is called?
Correct Answer: D. Menarche
Menarche marks the beginning of reproductive age in females, usually occurring between ages 12 and 15. It is influenced by genetic and environmental factors. This signifies that the body is capable of reproduction.
Which of the following is a hollow, pear-shaped muscular organ where the embryo develops?
Correct Answer: D. Uterus
The uterus, also known as the womb, provides the environment for the fetus to grow. Its muscular walls expand significantly during pregnancy. The lower part of the uterus opens into the vagina through the cervix.
Which hormone is detected in the urine to confirm pregnancy in most home test kits?
Correct Answer: A. hCG
Human Chorionic Gonadotropin (hCG) is produced by the placenta shortly after implantation. Its levels rise rapidly during the early stages of pregnancy. It maintains the corpus luteum to ensure progesterone production.
The temporary cessation of the menstrual cycle in females, usually around age 45-55, is?
Correct Answer: D. Menopause
Menopause marks the end of a woman's reproductive years as the ovaries stop releasing eggs. It is diagnosed after 12 consecutive months without a menstrual period. This phase is associated with a decrease in estrogen levels.
What is the outermost protective layer of the human egg cell called?
Correct Answer: B. Zona pellucida
The zona pellucida is a glycoprotein membrane surrounding the plasma membrane of an oocyte. It plays a vital role in binding sperm and preventing multiple sperm from entering. This layer disappears during the blastocyst stage before implantation.