before meiosis a sperm cell

HESI LPN

Maternity HESI Test Bank

1. Before meiosis, a sperm cell:

A. contains 46 chromosomes.
B. contains two X chromosomes.
C. is significantly larger than an egg cell.
D. contains both an X and a Y chromosome.

Correct answer: A

Rationale: Before meiosis, a sperm cell contains 46 chromosomes. This is because sperm cells, like other somatic cells, have a diploid number of chromosomes. During meiosis, the number of chromosomes is halved to 23 to combine with an egg cell during fertilization. Choice B is incorrect because a sperm cell carries either an X or a Y chromosome, not both (Choice D). Choice C is incorrect as sperm cells are generally smaller than egg cells, which is an adaptation that aids in motility and penetration of the egg during fertilization.

2. The mother of a breastfeeding 24-hour old infant is very concerned about the techniques involved in breastfeeding. She calls the nurse with each feeding to seek reassurance that she is doing it right. She tells the nurse, "Now my daughter is not getting enough to eat." Which response would be best for the nurse to make?

A. Feed your baby hourly until you feel confident that your child is receiving enough milk.
B. Don't worry, soon your milk will come in, and you will feel how full your breasts are.
C. Since you are so concerned, you should probably supplement breastfeeding with formula.
D. If your baby's urine is straw-colored, she's getting enough milk.

Correct answer: D

Rationale: Reassuring the mother that the baby's urine color can be an indicator of adequate hydration can help her feel more confident in her breastfeeding.

3. When caring for a pregnant woman with cardiac problems, the nurse must be alert for the signs and symptoms of cardiac decompensation. Which critical findings would the nurse find on assessment of the client experiencing this condition?

A. Regular heart rate and hypertension.
B. Increased urinary output, tachycardia, and dry cough.
C. Shortness of breath, bradycardia, and hypertension.
D. Dyspnea, crackles, and an irregular, weak pulse.

Correct answer: D

Rationale: In pregnant women with cardiac problems, signs of cardiac decompensation include dyspnea, crackles, an irregular, weak, and rapid pulse, rapid respirations, a moist and frequent cough, generalized edema, increasing fatigue, and cyanosis of the lips and nailbeds. Choice A is incorrect as a regular heart rate and hypertension are not typically associated with cardiac decompensation. Choice B is incorrect as increased urinary output and dry cough are not indicative of cardiac decompensation, only tachycardia is. Choice C is incorrect as bradycardia and hypertension are not typically seen in cardiac decompensation; dyspnea is a critical sign instead.

4. In the Ballard Gestational Age Assessment Tool, the nurse determines that a 15-month-old infant has a gestational age of 42 weeks. Based on this finding, which intervention is most important for the nurse to implement?

A. Provide blow-by oxygen
B. Provide a capillary blood glucose test
C. Draw arterial blood gases
D. Apply a pulse oximeter to the foot

Correct answer: B

Rationale: Late preterm infants, such as those with a gestational age of 42 weeks, are at higher risk for hypoglycemia due to immature metabolic regulation. Monitoring capillary blood glucose is crucial to detect and manage hypoglycemia promptly. Providing blow-by oxygen (Choice A) is not indicated for an infant at risk for hypoglycemia. Drawing arterial blood gases (Choice C) is not the primary intervention for assessing hypoglycemia. Applying a pulse oximeter to the foot (Choice D) is not directly related to monitoring blood glucose levels in this context.

5. A new mother who is a lacto-ovo vegetarian plans to breastfeed her infant. Which information should the nurse provide prior to discharge?

A. Continue prenatal vitamins with B12 while breastfeeding
B. Avoid using Lanolin-based nipple cream or ointment
C. Offer iron-fortified supplemental formula daily
D. Weigh the baby weekly to evaluate the newborn's growth

Correct answer: A

Rationale: The correct answer is A: 'Continue prenatal vitamins with B12 while breastfeeding.' Vitamin B12 is crucial for lacto-ovo vegetarian mothers to prevent deficiencies in both the mother and the infant. Choice B is incorrect as Lanolin-based nipple cream is safe for use during breastfeeding. Choice C is not necessary unless there are specific indications for iron supplementation. Choice D, weighing the baby weekly, is important for monitoring growth but not specifically related to the mother's diet.