ATI RN
The Human Reproductive System Questions
Question 1 of 5
In order for male differentiation to occur during embryonic development, testosterone must be secreted from the testes. What stimulates the secretion of testosterone during embryonic development?
Correct Answer: B
Rationale: The correct answer is B: Human chorionic gonadotropin (hCG) stimulates the secretion of testosterone during embryonic development. hCG is produced by the developing embryo and acts on the Leydig cells in the testes to trigger the production of testosterone. This hormone plays a crucial role in male differentiation by promoting the development of male reproductive organs. A: Luteinizing hormone (LH) from the maternal pituitary gland is not involved in the early stages of male differentiation in the embryo. LH is typically involved in the regulation of testosterone production postnatally. C: Inhibin from the corpus luteum is not involved in the stimulation of testosterone secretion during embryonic development. Inhibin is mainly involved in the negative feedback regulation of FSH secretion. D: Gonadotropin-releasing hormone (GnRH) from the embryo's hypothalamus is not responsible for directly stimulating testosterone secretion during embryonic development. GnRH regulates the secretion
Question 2 of 5
A man suffers from a disease that destroyed only the motor neurons of the spinal cord below the thoracic region. Which aspect of sexual function would not be possible?
Correct Answer: D
Rationale: The correct answer is D: Ejaculation. Motor neurons control muscle movements, including those involved in ejaculation. Since the motor neurons below the thoracic region are damaged, the man would not be able to ejaculate. Arousal (A), erection (B), and lubrication (C) are controlled by different mechanisms and do not solely rely on motor neurons in the spinal cord.
Question 3 of 5
Ovulation occurs in response to the release of an anterior pituitary hormone known as ________ hormone
Correct Answer: C
Rationale: The correct answer is C: luteinizing hormone (LH). LH is released by the anterior pituitary gland to trigger ovulation in females. It causes the mature ovarian follicle to release an egg during the menstrual cycle. Antidiuretic hormone (A) is involved in regulating water balance, not ovulation. Thyroid-stimulating hormone (B) stimulates the thyroid gland, not the ovaries. Follicle-stimulating hormone (D) helps in the development of ovarian follicles, but it is not responsible for triggering ovulation. Therefore, C is the correct answer as it directly stimulates the release of the egg during ovulation.
Question 4 of 5
The process of creating female gametes is called ________.
Correct Answer: B
Rationale: The correct answer is B: oogenesis. Oogenesis is the process of creating female gametes (eggs) through meiosis in the ovaries. Spermatogenesis (A) is the process of creating male gametes (sperm). Spermiogenesis (C) is the final stage of spermatogenesis where spermatids mature into sperm. Cleavage (D) refers to the rapid cell divisions that occur after fertilization. Therefore, B is the correct answer as it specifically relates to the formation of female gametes.
Question 5 of 5
Which of the following is a false description of the negative feedback loop involved in the production of testosterone?
Correct Answer: A
Rationale: The correct answer is A because follicle stimulating hormone (FSH) is not directly involved in the negative feedback loop for testosterone production. The negative feedback loop for testosterone involves the hypothalamus releasing GnRH, which stimulates the pituitary gland to release luteinizing hormone (LH), which then stimulates the Leydig cells in the testes to produce testosterone. Rising levels of testosterone inhibit the release of GnRH and LH through negative feedback to maintain hormonal balance. Choices B, C, and D are incorrect because they accurately describe components of the negative feedback loop for testosterone production.