Nokea
The production of testosterone in the interstitial cells is stimulated by
- A. inhibin
- B. luteinizing hormone
- C. follicl
- D. stimulating hormone
Correct Answer: B
Rationale: The correct answer is B: luteinizing hormone. Luteinizing hormone stimulates the Leydig cells in the testes to produce testosterone. Inhibin (A) regulates the production of FSH, not testosterone. Follicle-stimulating hormone (C) is responsible for sperm production in the testes, not testosterone. Thyroid-stimulating hormone (D) does not play a role in the production of testosterone.
You may also like to solve these questions
The medical term means pertaining to new birth:____________.
- A. antenatal
- B. neonatal
- C. neonate
- D. newborn
Correct Answer: B
Rationale: The correct answer is B: neonatal. "Neo-" means new or recent, and "-natal" refers to birth. Therefore, neonatal means pertaining to new birth. Choice A, antenatal, refers to the period before birth. Choice C, neonate, refers to a newborn baby. Choice D, newborn, simply means a recently born baby without specifying the time frame as "neonatal" does.
Giving prostaglandin E2 (PGE2) to a pregnant woman may result in an abortion. What is the best explanation for this finding?
- A. PGE2 strongly stimulates uterine contraction
- B. PGE2 causes constriction of the arteries leading to the placenta
- C. PGE2 stimulates the release of oxytocin from the posterior pituitary
- D. PGE2 increases the secretion of progesterone from the corpus luteum
Correct Answer: A
Rationale: The correct answer is A because prostaglandin E2 (PGE2) is known to strongly stimulate uterine contractions. This can lead to abortion by triggering premature labor and causing the expulsion of the fetus. Choice B is incorrect as PGE2 does not cause arterial constriction leading to the placenta. Choice C is incorrect because PGE2 does not stimulate the release of oxytocin; rather, oxytocin itself is a hormone that stimulates uterine contractions. Choice D is also incorrect as PGE2 does not increase progesterone secretion from the corpus luteum; in fact, PGE2 can have the opposite effect by inhibiting progesterone synthesis.
As preparation for hysterectomy, Mrs. Washington is having radiation therapy for cancer of the uterus, stage IIa. To promote her self-care during recovery from irradiation, which of the following is correct?
- A. Extensive psychologic support is necessary
- B. Extensive physical care is necessary
- C. Instruction in skin care is a priority
- D. Dietary fiber and roughage should be increased
Correct Answer: C
Rationale: Proper skin care is crucial to manage and prevent radiation-induced skin reactions.
The epididymal duct:
- A. is an intratesticular spermatic duct;
- B. continues with the deferent duct;
- C. continues with the testicular efferent ducts (vas efferens);
- D. part of the extratesticular spermatic ducts.
Correct Answer: B
Rationale: Step 1: The epididymal duct is a coiled tube located on the posterior surface of the testis.
Step 2: It continues as the deferent duct (vas deferens) which is responsible for transporting sperm from the epididymis to the ejaculatory duct.
Step 3: Therefore, choice B is correct as the epididymal duct indeed continues as the deferent duct.
Summary:
A: Incorrect - The epididymal duct is not located within the testis.
C: Incorrect - The testicular efferent ducts are separate from the epididymal duct.
D: Incorrect - The epididymal duct is considered part of the male reproductive system within the scrotum, not outside it.
The following secondary sexual characteristics are influenced by the testosterone:
- A. skeleton;
- B. voice;
- C. the secretory modification of the spermatogenic epithelium;
- D. the distribution of excess fat;
Correct Answer: B
Rationale: Step-by-step rationale:
1. Testosterone is a male sex hormone responsible for developing secondary sexual characteristics.
2. Voice deepening is a well-known secondary sexual characteristic influenced by testosterone.
3. Testosterone affects the larynx, causing vocal cords to lengthen and thicken, leading to a deeper voice.
4. Skeleton development is mainly influenced by growth hormones, not testosterone.
5. Secretory modifications in spermatogenic epithelium are regulated by other hormones like FSH and LH, not testosterone.
6. The distribution of excess fat is influenced by various factors like genetics and metabolism, not specifically testosterone.
Summary:
Voice deepening (choice B) is the correct answer as it is a well-known secondary sexual characteristic influenced by testosterone. Choices A, C, and D are incorrect as they are not directly influenced by testosterone in the context of secondary sexual characteristics.