Nokea
Which vitamin is essential for bone formation?
- A. A
- B. D
- C. B
- D. K
Correct Answer: B
Rationale: The correct answer is B: Vitamin D. Vitamin D is essential for bone formation as it helps the body absorb calcium, a key mineral for bone health. Without sufficient vitamin D, the body cannot effectively utilize calcium, leading to weakened bones. Vitamin A (Choice A) is important for vision and immune function, not specifically bone formation. Vitamin C (Choice C) is crucial for collagen synthesis but not directly involved in bone formation. Vitamin K (Choice D) plays a role in blood clotting and bone mineralization but is not as directly linked to bone formation as Vitamin D.
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What does line “G” point to?
- A. Dartos muscle
- B. Cremaster muscle
- C. Fascia
- D. Tunica albuginea
Correct Answer: B
Rationale: The correct answer is B: Cremaster muscle. Line "G" points to the cremaster muscle because it is the muscle responsible for raising and lowering the testes to regulate their temperature. This muscle is located within the spermatic cord and is crucial for maintaining optimal conditions for sperm production. The other choices are incorrect because:
A: The dartos muscle is responsible for wrinkling the scrotal skin but is not depicted by line "G."
C: Fascia refers to connective tissue and does not match the description of the muscle shown by line "G."
D: The tunica albuginea is a fibrous coat around the testis but is not represented by line "G."
Testosterone is converted to _____ in the prostate.
- A. cholesterol
- B. estrogen
- C. progesterone
- D. dihydrotestosterone
Correct Answer: D
Rationale: The correct answer is D: dihydrotestosterone. Testosterone is converted to dihydrotestosterone (DHT) in the prostate by the enzyme 5-alpha reductase. DHT is a more potent androgen that plays a crucial role in prostate growth and development. Choice A (cholesterol) is incorrect as it is not a product of testosterone conversion in the prostate. Choice B (estrogen) is incorrect as testosterone is not directly converted to estrogen in the prostate. Choice C (progesterone) is incorrect as progesterone is not the main product of testosterone conversion in the prostate.
At the time of ovulation, each secondary oocyte is surrounded by a single layer of cells known as a(n) ________.
- A. vesicular (Graafian) follicle
- B. primary follicle
- C. primordial follicle
- D. uterine (fallopian) follicle
Correct Answer: A
Rationale: The correct answer is A: vesicular (Graafian) follicle. At the time of ovulation, the secondary oocyte is surrounded by this structure, which is a mature follicle containing a fluid-filled antrum. This structure is essential for the release of the oocyte during ovulation. The other choices, B: primary follicle, C: primordial follicle, and D: uterine (fallopian) follicle, are incorrect because primary follicles are immature, primordial follicles are the earliest stage of follicle development, and uterine (fallopian) follicle is not a correct anatomical term.
Women infected with human papilloma virus (HPV) are at risk for which of the following?
- A. Uterine fibroids
- B. Cervical cancer
- C. Ovarian cysts
- D. Hemorrhagic
Correct Answer: B
Rationale: HPV infection is a significant risk factor for developing cervical cancer.
During the latter stages of pregnancy, many women experience an increase in body hair growth in a masculine pattern. What is the explanation for this?
- A. The ovaries secrete some testosterone along with the large amounts of estrogen produced late in pregnancy
- B. The fetal ovaries and testes secrete androgenic steroids
- C. The maternal and fetal adrenal glands secrete large amounts of androgenic steroids that are used by the placenta to form estrogen
- D. The placenta secretes large amounts of estrogen, some of which is metabolized to testosterone
Correct Answer: C
Rationale: Step 1: Maternal and fetal adrenal glands secrete androgenic steroids.
Step 2: Placenta uses these androgenic steroids to form estrogen.
Step 3: Increased estrogen levels can lead to body hair growth.
Therefore, the correct answer (C) is supported by the process of androgenic steroids being secreted by the adrenal glands, utilized by the placenta to form estrogen, resulting in increased body hair growth.
Summary:
A (The ovaries secrete some testosterone along with estrogen) is incorrect as testosterone is not primarily secreted by the ovaries late in pregnancy.
B (The fetal ovaries and testes secrete androgenic steroids) is incorrect as the primary source of androgenic steroids in this context is the adrenal glands, not fetal ovaries or testes.
D (The placenta secretes estrogen, some of which is metabolized to testosterone) is incorrect as the main source of estrogen in this scenario is from the and