Nokea
The testosterone secretion is controlled by:
- A. the FSH;
- B. the LH;
- C. the corticoadrenal;
- D. the negative feedback of posterior pituitary;
Correct Answer: B
Rationale: Step 1: LH (luteinizing hormone) is produced by the pituitary gland and plays a key role in stimulating the Leydig cells in the testes to produce testosterone.
Step 2: Testosterone secretion is directly controlled by the LH through this stimulation.
Step 3: FSH (follicle-stimulating hormone) is involved in sperm production, not testosterone secretion.
Step 4: Corticoadrenal hormones are related to stress response, not testosterone regulation.
Step 5: Negative feedback from the posterior pituitary does not directly control testosterone secretion.
Therefore, the correct answer is B (the LH) as it directly influences testosterone production.
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The general meaning of the term "corpus" is best described by which of the following?
- A. Abdomen
- B. Body
- C. Death
- D. Head
Correct Answer: B
Rationale: The correct answer is B: Body. Corpus commonly refers to a collection of written or spoken texts, which together form a body of work. "Body" is the best choice as it encompasses the idea of a collection or group of related items. A is incorrect as it refers specifically to the abdomen, not the general term. C, Death, and D, Head, are unrelated to the general meaning of "corpus" as they do not convey the idea of a body or collection.
Bone is partially broken, it breaks on one surface and bends on another is known as ________________.
- A. Colles fracture
- B. Greenstick fracture
- C. Impacted fracture
- D. Compression fracture
Correct Answer: B
Rationale: The correct answer is B: Greenstick fracture. This type of fracture occurs in children due to their bones being softer and more flexible. In a greenstick fracture, the bone is partially broken, breaking on one surface while bending on the other. This happens because children's bones have more collagen and less mineral content, making them more likely to bend rather than break completely.
A: Colles fracture is a specific type of wrist fracture where the distal radius is broken.
C: Impacted fracture occurs when the broken ends of the bone are driven into each other.
D: Compression fracture involves the bone being crushed or compressed, usually seen in the spine.
The uterus is a ...... organ:
- A. funnel-shaped;
- B. unpaired;
- C. cavitary;
- D. muscular
Correct Answer: D
Rationale: The correct answer is D: muscular. The uterus is composed of smooth muscle tissue, allowing it to contract during childbirth and menstruation. This contraction is essential for the expulsion of the fetus or uterine lining. Funnel-shaped (A) and cavitary (C) describe the shape and structure of the uterus, but they do not define its primary function. Unpaired (B) is incorrect as the uterus is a paired organ in the female reproductive system.
Which of the following statements relating to the corpus luteum is incorrect.
- A. the corpus luteum contains the zona pellucida
- B. the corpus luteum degrades if fertilization does not take place
- C. the corpus luteum is derived from the Latin word meaning yellow body.
- D. the corpus luteum develops from the remaining follicle after ovulation
Correct Answer: A
Rationale: The correct answer is A because the corpus luteum does not contain the zona pellucida. The zona pellucida is a glycoprotein layer surrounding the oocyte, not the corpus luteum. The other choices are incorrect because B is true - the corpus luteum degrades if fertilization does not occur; C is true - corpus luteum derives from Latin for yellow body; and D is true - the corpus luteum develops from the remaining follicle after ovulation.
Which hormone is made by the interstitial cells of the testis?
- A. Estrogen
- B. Testosterone
- C. Human chorionic gonadotropin (hCG)
- D. Luteinizing hormone (LH)
Correct Answer: B
Rationale: Certainly. The correct answer is B: Testosterone. Interstitial cells of the testis, also known as Leydig cells, synthesize and secrete testosterone. Testosterone is the primary male sex hormone responsible for the development of male reproductive tissues and characteristics. Estrogen (A) is primarily produced in the ovaries in females. Human chorionic gonadotropin (hCG) (C) is produced by the placenta during pregnancy. Luteinizing hormone (LH) (D) is secreted by the anterior pituitary gland and stimulates the interstitial cells to produce testosterone.