Reproduction — Set 5
Biology · प्रजनन · Questions 41–50 of 50
What is the average length of the human menstrual cycle?
Correct Answer: C. 28 days
While cycles can vary between individuals, 28 days is considered the standard average. The cycle is divided into the follicular phase, ovulation, and the luteal phase. Stress and health conditions can cause irregularities in this cycle.
Which hormone, secreted by the hypothalamus, triggers the pituitary to release FSH and LH?
Correct Answer: D. GnRH
Gonadotropin-Releasing Hormone (GnRH) is the primary regulator of the reproductive system. It is released in pulses to stimulate the anterior pituitary. This starts the hormonal cascade that leads to puberty.
The site of attachment of the umbilical cord in the newborn becomes the?
Correct Answer: A. Navel
The navel, or belly button, is the scar left after the umbilical cord is cut and heals. During pregnancy, this cord was the lifeline for the fetus. It contained blood vessels that transported nutrients and waste.
Which of the following is the male gamete?
Correct Answer: A. Sperm
Sperm is the microscopic reproductive cell produced by males. It is designed to swim and deliver genetic material to the egg. It is the smallest cell in the human body.
What is the primary function of the Fimbriae in the female reproductive system?
Correct Answer: C. Catching the released egg
Fimbriae are finger-like projections at the end of the fallopian tubes. They sweep over the ovary to pick up the egg after ovulation. They guide the egg into the tube for travel to the uterus.
At what stage of development is the embryo when it implants in the uterus?
Correct Answer: B. Blastocyst
The blastocyst is a hollow ball of cells that forms about 5 days after fertilization. It consists of an inner cell mass that will become the fetus and an outer layer that will form the placenta. Implantation marks the biological start of pregnancy.
Which of the following is a female primary sex organ?
Correct Answer: B. Ovary
Ovaries are the primary sex organs because they produce both gametes (eggs) and sex hormones. Females have two ovaries located on either side of the uterus. The other organs listed are considered secondary or accessory reproductive structures.
What is the process of surgical sterilization in males called?
Correct Answer: A. Vasectomy
Vasectomy involves cutting or sealing the vas deferens to prevent sperm from entering the semen. It is a highly effective and permanent form of birth control. It does not affect testosterone production or sexual drive.
The term 'Menopause' refers to the permanent end of which process?
Correct Answer: D. Menstruation
Menopause is a natural biological process occurring as a woman ages. It signifies the end of the ability to conceive children naturally. It typically occurs between the late 40s and mid-50s.
The process of fusion of male and female gametes is called?
Correct Answer: A. Fertilization
Fertilization is the fusion of male gamete (sperm) with female gamete (egg/ovum) to form a zygote. In humans, this typically occurs in the fallopian tube. The zygote then undergoes cell division to form an embryo.