ATI RN
Human Reproductive System pdf NCERT Questions
Question 1 of 5
A man who has been exposed to high levels of gamma radiation is sterile due to destruction of the germinal epithelium of the seminiferous tubules, although he has normal levels of testosterone. Which of the following would be found in this patient?
Correct Answer: A
Rationale: Step 1: High levels of gamma radiation cause destruction of germinal epithelium, leading to infertility. Step 2: Normal testosterone levels indicate intact Leydig cells, responsible for testosterone production. Step 3: Normal secretory pattern of gonadotropin-releasing hormone (GnRH) is expected as it regulates pituitary hormone secretion. Step 4: Inhibin is produced by Sertoli cells (part of germinal epithelium) and would be decreased due to destruction. Step 5: Follicle-stimulating hormone (FSH) levels would be elevated, not suppressed, due to lack of inhibin feedback. Step 6: Leydig cells are intact, so Leydig cells are not absent in this scenario.
Question 2 of 5
What excess cellular component do spermatids shed to become sperm during spermiogenesis?
Correct Answer: B
Rationale: During spermiogenesis, spermatids shed excess cytoplasm to become mature sperm. This process helps streamline the sperm structure for efficient motility and fertilization. DNA (choice A) is essential for sperm function and remains within the sperm. The flagellum (choice C) is actually a necessary structure for sperm motility. Mitochondria (choice D) play a crucial role in providing energy for sperm movement. Shedding excess cytoplasm ensures that the mature sperm is streamlined and optimized for its specific functions.
Question 3 of 5
Which of the following is responsible for secondary sex characteristics in females?
Correct Answer: A
Rationale: Estrogens are responsible for secondary sex characteristics in females as they promote breast development, regulate the menstrual cycle, and contribute to the distribution of body fat. Progesterone mainly prepares the uterus for pregnancy. Follicle-stimulating hormone (FSH) plays a role in the development of ovarian follicles and the maturation of eggs but does not directly influence female secondary sex characteristics.
Question 4 of 5
This tiny gland produces a secretion that is similar to a large lysosome and that cleanses the male urethra of assists penetration of the egg is called traces of acidic urine prior to the ________.
Correct Answer: D
Rationale: The correct answer is D: bulbo-urethral gland. This gland produces a clear secretion that neutralizes traces of acidic urine, lubricates the urethra, and assists in sperm motility. The other choices are incorrect because: A: Flagellum is a structure on sperm cells for propulsion. B: Prostate produces seminal fluid but does not cleanse the urethra. C: Midpiece is a part of the sperm cell that contains mitochondria for energy production, not a gland.
Question 5 of 5
The spermatic cord houses the
Correct Answer: D
Rationale: The correct answer is D: sperm production. The spermatic cord houses the structures that support and transport sperm, including the vas deferens, blood vessels, nerves, and lymphatics. It does not produce testosterone (A), facilitate ovum fertilization (B), or contain the urethra (C). Sperm production occurs in the testes, while the spermatic cord provides the pathway for the sperm to travel from the testes to the urethra for ejaculation.