Nokea
How many autosomes does a human primary spermatocyte have?
- A. 34
- B. 44
- C. 54
- D. 33
Correct Answer: B
Rationale: The correct answer is B (44 autosomes) because a human primary spermatocyte is a diploid cell containing a total of 44 autosomes. This is because humans have 22 pairs of autosomes in their somatic cells. During meiosis I, the primary spermatocyte undergoes replication and recombination, resulting in 22 pairs of autosomes (44 autosomes) that will be divided into two haploid secondary spermatocytes. Choices A, C, and D are incorrect because they do not reflect the correct number of autosomes present in a human primary spermatocyte.
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Advanced breast cancer often metastasizes to the bone. If this occurs, a prudent nursing measure would be to
- A. encourage a diet high in calcium
- B. caution the patient against falling, reaching, twisting, or lifting heavy objects
- C. encourage the patient to abstain from sexual intercourse
- D. caution the patient about using any pain medication
Correct Answer: B
Rationale: Preventing falls and injuries is crucial in patients with bone metastasis due to increased fracture risk.
Sexual feelings are normal and necessary
- A. for reproduction to occur
- B. for the heart and lungs to function properly
- C. for an ovum to be released from a female’s ovary each month
- D. for teens to become adults
Correct Answer: A
Rationale: The correct answer is A because sexual feelings are indeed necessary for reproduction to occur. Sexual arousal and desire play a vital role in initiating the process of conception and ensuring the continuation of the human species. Without sexual feelings, procreation would not be possible.
Explanation for why the other choices are incorrect:
B: Sexual feelings are not necessary for the heart and lungs to function properly. These bodily functions are regulated by the autonomic nervous system, not by sexual arousal.
C: While sexual feelings can influence the release of an ovum during ovulation, they are not the sole factor. Ovulation can occur without sexual arousal.
D: Sexual feelings are not a requirement for teenagers to become adults. Puberty and the physical and emotional changes that come with it mark the transition from adolescence to adulthood, not sexual feelings.
The distal portion of the male urethra ________. that runs the length of the penis is the epididymis, ductus (vas) ________.
- A. prostatic,Membranous
- B. prostatic urethra
- C. membranous urethra
- D. epididymis, ductus (vas)
Correct Answer: D
Rationale: The correct answer is D because the question is referring to the male urethra, not the epididymis or vas deferens. The distal portion of the male urethra that runs the length of the penis is the membranous urethra and the spongy (penile) urethra. A and B are incorrect as they mention the prostatic urethra, which is not the distal portion that runs the length of the penis. Choice C is incorrect as it only mentions the membranous urethra and does not address the full distal portion.
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.
The deferent duct (vas deferens):
- A. joins with the seminal vesicle duct and forms the ejaculatory duct;
- B. continues the rete testis;
- C. continues the epididymal duct;
- D. is an extratesticular spermatic duct;
Correct Answer: C
Rationale: Step-by-step rationale for Choice C (Continues the epididymal duct) being the correct answer:
1. The deferent duct, also known as the vas deferens, is a continuation of the epididymal duct.
2. Sperm mature and are stored in the epididymis before passing into the vas deferens.
3. The vas deferens carries sperm from the epididymis to the ejaculatory duct during ejaculation.
Summary:
- Choice A is incorrect because the deferent duct does not join with the seminal vesicle duct to form the ejaculatory duct.
- Choice B is incorrect as the vas deferens does not continue the rete testis.
- Choice D is incorrect as the vas deferens is an intratesticular spermatic duct, not extratesticular.