Nokea
During formation of the germ layer in the embryo, which layer gives rise to the nervous system?
- A. Ectoderm
- B. Mesoderm
- C. Endoderm
- D. Entoderm
Correct Answer: A
Rationale: The ectoderm forms the nervous system, along with the skin and sensory organs.
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What is the purpose of the ovum’s zona pellucida?
- A. Prevents multiple sperm from fertilizing the ovum
- B. Stimulates the ovum to begin mitotic cell division
- C. Allows the 46 chromosomes from each gamete to merge
- D. Makes a pathway for more than one sperm to reach the ovum
Correct Answer: A
Rationale: The zona pellucida is a protective layer surrounding the ovum (egg cell). One of its primary functions is to prevent multiple sperm from fertilizing the egg by only allowing one sperm to penetrate and fertilize the ovum. This is crucial for ensuring that the resulting embryo has the correct genetic material (46 chromosomes) and does not have an abnormal number of chromosomes, which could lead to developmental issues. The zona pellucida acts as a physical barrier that helps to maintain the genetic integrity of the offspring.
What condition would the nurse suspect when a patient calls to report feeling very bloated after egg retrieval 3 days ago?
- A. ovarian hyperstimulation syndrome
- B. ectopic pregnancy
- C. ovarian hemorrhage
- D. hydrosalpinx
Correct Answer: A
Rationale: Ovarian hyperstimulation syndrome (OHSS) is a potential complication of egg retrieval, causing bloating and abdominal discomfort.
During pregnancy, which structure secretes hormones until the placenta takes over?
- A. Decidua basalis
- B. Chorionic villi
- C. Corpus luteum
- D. Syncytiotrophoblast
Correct Answer: C
Rationale: The corpus luteum produces hormones until the placenta takes over.
A patient who is 16 weeks pregnant with her first baby asks how long it will be before she
feels the baby move. Which is the nurse’s best answer?
- A. “You should have felt the baby move by now.”
- B. “The baby is moving, but you can’t feel it yet.”
- C. “Some babies are quiet and you don’t feel them mov
- D. “Within the next month you should start to feel fluttering sensations.”
Correct Answer: D
Rationale: Maternal perception of fetal movement (quickening) usually begins between 17 and 20 weeks
after conception. Because this is her first pregnancy, movement is felt toward the later part of
the 17 to 20 weeks. “The baby is moving, but you can’t feel it yet” may be alarming to the
woman. “Some babies are quiet and you don’t feel them move” is a true statement; the fetus’
movements are not strong enough to be felt until 17 to 20 weeks; however, this statement does
not answer the woman’s concern. Fetal movement should be felt between 17 and 20 weeks; if
movement is not perceptible by the end of that time, further assessment will be necessary.
What hormone stimulates ovulation?
- A. None
- B. Luteinizing hormone (LH).
- C. None
- D. None
Correct Answer: B
Rationale: LH surge triggers ovulation.