Nokea
Which statement regarding the uterus is true:
- A. it is pear-shaped;
- B. the superior extremity is represented by the corpus;
- C. the vagina is inserted on the inferior extremity;
- D. it is located laterally in the pelvis;
Correct Answer: A
Rationale: The correct answer is A: it is pear-shaped. The uterus is indeed pear-shaped in structure, with a wider upper part called the corpus and a narrower lower part called the cervix. The pear shape allows for the expansion required during pregnancy. The other choices are incorrect: B is inaccurate as the superior extremity is the fundus, not the corpus; C is incorrect as the vagina is connected to the cervix, not the inferior extremity; D is wrong as the uterus is located centrally in the pelvis.
You may also like to solve these questions
Circumcision is the process of removing:
- A. Glans penis
- B. Scrotum
- C. Foreskin
- D. Vas deferens
Correct Answer: C
Rationale: The correct answer is C: Foreskin. Circumcision involves the surgical removal of the foreskin, the retractable double-layered fold of skin that covers the head of the penis. This procedure is commonly practiced for cultural, religious, or medical reasons. Removing the glans penis (A) or scrotum (B) would be highly inappropriate and damaging. The vas deferens (D) is a duct that carries sperm from the testes, which is not involved in circumcision. Therefore, the correct anatomical structure that is removed during circumcision is the foreskin.
Which of the following factors increase the risk of prostate cancer?
- A. A low-fat diet
- B. Alcohol and caffeine consumption
- C. Living an inactive lifestyle
- D. Smoking habits
Correct Answer: C
Rationale: An inactive lifestyle is associated with an increased risk of prostate cancer.
Which structure will actually become the fetus?
- A. morula
- B. blastocyst
- C. inner cell mass
- D. zygote
Correct Answer: C
Rationale: The correct answer is C: inner cell mass. After fertilization, the zygote undergoes several cell divisions to form a hollow ball of cells called a blastocyst. Within the blastocyst, the inner cell mass contains cells that will develop into the fetus. The morula is an earlier stage consisting of a solid ball of cells. The zygote is the initial cell formed from the fusion of egg and sperm, but it does not directly become the fetus. Therefore, the inner cell mass is the structure that will actually develop into the fetus, making it the correct answer.
Men who take large doses of testosterone-like androgenic steroids for long periods are sterile in the reproductive sense of the word. What is the explanation for this finding?
- A. High levels of androgens bind to testosterone receptors in the Sertoli cells, resulting in overstimulation of inhibin formation
- B. Overstimulation of sperm cell production results in the formation of defective sperm cells
- C. High levels of androgen compounds inhibit the secretion of gonadotropin-releasing hormone by the hypothalamus, resulting in the inhibition of luteinizing hormone and follicle-stimulating hormone release by the anterior pituitary
- D. High levels of androgen compounds produce hypertrophic dysfunction of the prostate gland
Correct Answer: C
Rationale: The correct answer is C because high levels of androgen compounds inhibit the secretion of gonadotropin-releasing hormone (GnRH) by the hypothalamus. GnRH is responsible for stimulating the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) by the anterior pituitary gland. LH and FSH are crucial for proper testicular function, including sperm production. When the secretion of GnRH is inhibited by high levels of androgens, it leads to a decrease in LH and FSH levels, ultimately disrupting the normal feedback loop of the hypothalamic-pituitary-gonadal axis. This disruption results in impaired sperm production and fertility.
Choice A is incorrect because overstimulation of inhibin formation does not directly lead to sterility. Choice B is incorrect because overstimulation of sperm cell production would not result in the formation of defective sperm cells leading to sterility. Choice D is incorrect because hypert
The semen contains liquids originating from:
- A. prostate;
- B. scrotum;
- C. seminal vesicles;
- D. epididymal duct;
Correct Answer: A
Rationale: Step-by-step rationale:
1. The prostate gland secretes a milky fluid that constitutes a major portion of semen.
2. This prostatic fluid contains enzymes, citric acid, and zinc, which nourish and protect sperm.
3. Seminal vesicles also contribute to semen production, but mainly by providing fructose for sperm energy.
4. The scrotum houses the testes but does not directly contribute fluids to semen.
5. The epididymal duct is a site for sperm maturation and storage but does not produce semen fluids.
Summary:
Choice A is correct because the prostate gland secretes a significant portion of semen. Choices B, C, and D are incorrect because they do not directly contribute fluids to semen production.