Nokea
The purpose of the urethra is to
- A. carry only urine
- B. carry only semen
- C. carry a mixture of semen and urine
- D. carry both semen and urine but not at the same time
Correct Answer: D
Rationale: The correct answer is D. The urethra is a tube that carries both urine from the bladder and semen from the reproductive system. This is essential for the excretion of waste (urine) and reproduction (semen). Choice A is incorrect because the urethra carries both urine and semen. Choice B is incorrect as the urethra carries both substances, not just semen. Choice C is incorrect because the urethra carries semen and urine separately, not as a mixture. Overall, choice D is correct because the urethra can carry both semen and urine, just not simultaneously.
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In the circulatory system of a fetus, which of the following is greater before birth than after birth?
- A. Arterial Po2
- B. Right atrial pressure
- C. Aortic pressure
- D. Left ventricular pressure
Correct Answer: B
Rationale: The correct answer is B: Right atrial pressure. Before birth, the fetal circulatory system has a shunt called the foramen ovale that allows blood to bypass the lungs, resulting in higher pressure in the right atrium. After birth, when the foramen ovale closes, the right atrial pressure decreases.
Incorrect Choices:
A: Arterial Po2 - Typically, arterial Po2 is lower in the fetus due to the placenta's oxygenation, but it increases after birth.
C: Aortic pressure - Aortic pressure remains relatively stable before and after birth.
D: Left ventricular pressure - Left ventricular pressure increases after birth due to the transition from fetal to neonatal circulation.
The female sex of the child involves the following during fecundation:
- A. the spermatozoon should contain the X sex chromosome;
- B. the spermatozoon should contain the Y sex chromosome;
- C. the ovule should contain the contain the Y sex chromosome;
- D. the spermatozoon should contain the X sex chromosome and the ovule should contain the contain the X sex chromosome
Correct Answer: D
Rationale: The correct answer is D because during fecundation, the female sex of the child is determined by the presence of the X sex chromosome in the spermatozoon and the ovule. This leads to the combination of XX chromosomes, resulting in a female child. Choice A (spermatozoon with X chromosome) alone would lead to a female child, but it requires the ovule to also have an X chromosome for the correct combination. Choice B (spermatozoon with Y chromosome) would result in a male child. Choice C (ovule with Y chromosome) is incorrect as the ovule always contains an X chromosome. Thus, the correct combination for a female child is when the spermatozoon contains the X chromosome and the ovule contains the X chromosome.
On inspection of the external male genitalia, the nurse notes which finding as abnormal?
- A. The scrotum is covered with dark rugous skin.
- B. The skin covering the penis is hairless and loose.
- C. The urinary meatus is located on the upper surface of the penis.
- D. The left side of the scrotum hangs slightly lower than the right.
Correct Answer: C
Rationale: The correct answer is C because the urinary meatus should be located at the tip of the penis, not on the upper surface. This abnormality may indicate a condition like hypospadias. Option A describes normal scrotum skin. Option B describes normal penile skin. Option D describes a normal anatomical variation in scrotal positioning.
A nurse teaches a male client how to perform a testicular self-exam in an effort to identify lumps that may be present in the testes. What does the nurse teach the client regarding normal testes size?
- A. Both testes should be the same size
- B. One testis is usually larger than the other
- C. One testis usually has a lump; the other does not
- D. Both testes usually have lumps
Correct Answer: B
Rationale: It is normal for one testicle to be slightly larger than the other.
The 16 feet long tube that is coiled and located above the
- A. epididymis
- B. Vas deferens
- C. Urethra
- D. Ureter
Correct Answer: A
Rationale: The correct answer is A: epididymis. The epididymis is a coiled tube located on the back of each testicle, approximately 16 feet long when unraveled. It plays a crucial role in sperm maturation and storage. The other choices, B: Vas deferens, C: Urethra, and D: Ureter, are incorrect as they are not coiled tubes located above the testicles and do not have the same function as the epididymis in sperm development and storage.