Nokea
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?
- A. Arousal
- B. Erection
- C. Lubrication
- D. Ejaculation
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.
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Which of the following is a false description of the negative feedback loop involved in the production of testosterone?
- A. Follicl
- B. stimulating hormone (FSH) targets the testes of males.
- C. Rising levels of testosterone promote increased release of gonadotropin releasing hormone (GnRH) from the hypothalamus.
- D. Gonadotropin releasing hormone (GnRH) is released by the hypothalamus; this hormone
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.
Which of the following terms indicate the beginning of the fertile period when gametes are produced and secondary sex characteristics appear?
- A. Teenage
- B. Adolescence
- C. Puberty
- D. Juvenile
Correct Answer: C
Rationale: The correct answer is C: Puberty. Puberty is the stage of development when gametes are produced and secondary sex characteristics appear, marking the beginning of the fertile period. This period typically occurs between the ages of 10 to 14 in females and 12 to 16 in males.
A: Teenage - Incorrect. Teenage refers to the age range between 13 to 19 and does not specifically indicate the onset of gamete production and secondary sex characteristics.
B: Adolescence - Incorrect. Adolescence is a broader term that encompasses the period from childhood to adulthood, including puberty, but it does not specifically indicate the beginning of the fertile period.
D: Juvenile - Incorrect. Juvenile refers to a young organism that has not reached sexual maturity and does not signify the beginning of gamete production and secondary sex characteristics.
Regarding histology of male reproductive system
- A. Leydig cells are found in the seminiferous tubule
- B. Sertoli cells are involved in maturation of spermatids.
- C. The luminal epithelium of efferent ductules is irregular.
- D. Contraction of smooth muscle in vas deferens is stimulated via sympathetic
Correct Answer: C
Rationale: The correct answer is C because the luminal epithelium of efferent ductules is indeed irregular, which helps in absorption and modification of fluid. A, Leydig cells are located outside the seminiferous tubule. B, Sertoli cells provide nourishment and support to developing sperm cells but do not mature spermatids. D, Contraction of smooth muscle in vas deferens is stimulated by the parasympathetic nervous system, not the sympathetic.
The gonads produce sex cells, also spermatids into sperm is known as known as ________, ________.
- A. zygotes
- B. mitosis
- C. interstitial cells
- D. spermiogenesis
Correct Answer: D
Rationale: The correct answer is D: spermiogenesis. Spermiogenesis is the process where spermatids mature into sperm cells in the testes. The gonads (testes in males) produce sex cells, but zygotes are formed through fertilization, not spermiogenesis. Mitosis is a type of cell division for growth and repair, not sperm production. Interstitial cells are found in the testes but are responsible for producing testosterone, not the maturation of spermatids into sperm cells. Therefore, option D is the correct choice as it specifically relates to the transformation of spermatids into sperm cells in the testes.
A nurse is called to the playground near her house in relation to an adolescent who experienced intense pain in his testicle after riding his bike. The nurse suspects which of the following problems has occurred?
- A. Torsion of the spermatic cord
- B. Cryptorchidism
- C. Phimosis
- D. Spermatocele
Correct Answer: A
Rationale: Testicular torsion presents with sudden, severe pain and requires immediate medical attention.