Nokea
The primitive stem cell of spermatogenesis, which is found on the periphery of each seminiferous tubule, is called a ________.
- A. spermatogonium
- B. spermatid
- C. primary spermatocyte
- D. secondary spermatocyte
Correct Answer: A
Rationale: The correct answer is A: spermatogonium. Spermatogonium is the primitive stem cell of spermatogenesis located at the periphery of seminiferous tubules. It undergoes mitosis to produce more spermatogonia or differentiate into primary spermatocytes. Spermatid and secondary spermatocyte are later stages in spermatogenesis, not the primitive stem cell. Primary spermatocyte is the immediate progeny of spermatogonium following differentiation.
You may also like to solve these questions
The nurse is assessing a client for reproductive health problems. What assessments are most important? (Select all that apply.)
- A. Bleeding
- B. Pain
- C. Sexual orientation
- D. Masses
Correct Answer: A
Rationale: The correct answer is A: Bleeding. Assessing for abnormal bleeding is crucial in reproductive health as it can indicate various conditions such as hormonal imbalances, infections, or malignancies. Bleeding can provide important clues about the client's menstrual cycle, potential pregnancy complications, or underlying health issues. Pain (B) is important but may be more subjective and can be related to various factors beyond reproductive health. Sexual orientation (C) is not directly related to assessing reproductive health problems. Masses (D) can be important but may not be as common or specific as abnormal bleeding in reproductive health assessments.
Frank is a 24 year old man who presents with multiple vesicles and burning erosions on the shaft of his penis and some tender inguinal adenopathy. Which of the following is most likely?
- A. Primary syphilis
- B. Herpes simplex
- C. Chancroid
- D. Gonorrhea
Correct Answer: B
Rationale: The correct answer is B: Herpes simplex. This is because the presentation of multiple vesicles, burning erosions on the penis shaft, and inguinal adenopathy is classic for genital herpes. Primary syphilis (A) presents with a painless chancre, chancroid (C) with painful ulcers, and gonorrhea (D) with urethral discharge or dysuria. Genital herpes is a viral infection caused by HSV-1 or HSV-2 and typically presents with vesicles, erosions, and adenopathy in the affected area.
Soft spots that refers to unossified areas in an infants skull is termed as
- A. Sulcus
- B. Sinus
- C. Fontanelle
- D. Suture
Correct Answer: C
Rationale: The correct answer is C: Fontanelle. Fontanelles are soft spots in an infant's skull where the bones have not yet fully fused. They allow for the baby's brain to grow and accommodate the rapid brain development during the early months of life. Sulcus refers to a groove or furrow, sinus is a cavity within a bone, and suture is the line where two bones meet. These terms do not specifically refer to the unossified areas in an infant's skull, making them incorrect choices.
What is produced by the ovaries?
- A. Primary oocytes, insulin and estrogen
- B. Secondary oocytes, progesterone and cortisol
- C. Tertiary oocytes, insulin and estrogen
- D. Secondary oocytes, estrogen and progesterone
Correct Answer: D
Rationale: The correct answer is D because the ovaries produce secondary oocytes, which are released during ovulation for fertilization. Additionally, the ovaries produce estrogen and progesterone, which are essential for the menstrual cycle and reproductive health. Choice A is incorrect as primary oocytes are present before birth and insulin is produced by the pancreas. Choice B is incorrect because cortisol is produced by the adrenal glands, not the ovaries. Choice C is incorrect as tertiary oocytes do not exist, and insulin is produced by the pancreas.
A 30-year-old woman is breast-feeding her infant. During suckling, which of the following hormonal responses is expected?
- A. Increased secretion of antidiuretic hormone (ADH) from the supraoptic nuclei
- B. Increased secretion of ADH from the paraventricular nuclei
- C. Increased secretion of oxytocin from the paraventricular nuclei
- D. Decreased secretion of neurophysin
Correct Answer: C
Rationale: The correct answer is C: Increased secretion of oxytocin from the paraventricular nuclei. During breast-feeding, oxytocin is released from the paraventricular nuclei in response to suckling. Oxytocin stimulates the contraction of myoepithelial cells around the alveoli and ducts in the breast, facilitating milk ejection. This response helps in the release of milk for the infant's feeding.
Rationale:
- Choice A is incorrect because ADH is not directly related to breast-feeding.
- Choice B is incorrect because ADH is not primarily released from the paraventricular nuclei in response to breast-feeding.
- Choice D is incorrect as neurophysin is not directly involved in the hormonal response during breast-feeding.