Nokea
An 18-yr-old female patient who has been admitted to the emergency department after a motor vehicle crash is scheduled for chest and abdominal x-rays. Which information may alter the plans for the x-rays?
- A. Report of abdominal pain
- B. Positive result of hCG test
- C. Blood pressure of 172/88 mm Hg
- D. Temperature of 102.1°F (38.9°
Correct Answer: B
Rationale: The correct answer is B: Positive result of hCG test. This may indicate that the patient is pregnant, which would significantly alter the plans for the x-rays due to the potential harm to the fetus from radiation exposure.
A: Report of abdominal pain is a common symptom after a motor vehicle crash and would not directly alter the plans for x-rays.
C: Blood pressure of 172/88 mm Hg could indicate hypertension but would not directly impact the need for chest and abdominal x-rays.
D: Temperature of 102.1°F (38.9°C) could suggest an infection but would not typically change the necessity for x-rays.
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With respect to Sertoli cells which of the following statements is incorrect
- A. Nourish developing sperm
- B. receive stimulation by testosterone
- C. phagocytose defective sperm
- D. secrete the hormone inhibin which inhibits luteinizing hormone secretion
Correct Answer: D
Rationale: The correct answer is D because Sertoli cells do secrete inhibin, but it does not inhibit luteinizing hormone secretion. Inhibin actually inhibits follicle-stimulating hormone (FSH) secretion. Sertoli cells support spermatogenesis by nourishing developing sperm (A), they are stimulated by testosterone (B), and they also phagocytose defective sperm (C). Therefore, option D is incorrect as it misrepresents the role of inhibin in the endocrine regulation of the male reproductive system.
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.
Which statement describes a function of the human male reproductive system?
- A. It produces gametes in testes.
- B. It supplies a fluid that protects the fetus.
- C. It provides support for the development of the embryo.
- D. It provides nutrient materials through a placenta.
Correct Answer: A
Rationale: The correct answer is A because the primary function of the human male reproductive system is to produce gametes (sperm) in the testes. Sperm are essential for fertilization and reproduction. Choice B is incorrect as the fluid that protects the fetus is produced by the female reproductive system. Choice C is incorrect as embryo development support is provided by the female reproductive system. Choice D is incorrect as the placenta, which provides nutrient materials, is a structure formed by the female reproductive system during pregnancy.
A cell called the ______ is a fertilized cell with 46 chromosomes.
- A. spermatozoon
- B. polar body
- C. ovum
- D. zygote
Correct Answer: D
Rationale: The correct answer is D: zygote. A zygote is formed when a sperm cell fertilizes an egg cell, resulting in a single cell with a full set of 46 chromosomes. This process is called fertilization and marks the beginning of a new individual. The other choices (A: spermatozoon, B: polar body, C: ovum) are not correct because a spermatozoon is a mature sperm cell with 23 chromosomes, a polar body is a byproduct of meiosis in the female reproductive system and has only 23 chromosomes, and an ovum is an unfertilized egg cell also containing 23 chromosomes.
The Fallopian tube is linked to the:
- A. vagina;
- B. uterus;
- C. ovary;
- D. vulva;
Correct Answer: B
Rationale: The correct answer is B: uterus. The Fallopian tube connects the ovaries to the uterus, allowing eggs to travel from the ovaries to the uterus for fertilization. The vagina (A) is not directly connected to the Fallopian tube but serves as the birth canal. The ovary (C) is where eggs are produced and released into the Fallopian tube, not directly linked to it. The vulva (D) is the external part of the female genitalia and is not connected to the Fallopian tube.