The parents of a 3-month old infant with cystic fibrosis (CF) want to know how their child got this disease, because no one in either of their families has CF. What is the nurse's best response based on the understanding of CF?
Both parents are carrier of the CF gene
The inheritance pattern is multifactorial
The result is probably a genetic mutation
Only one parent carries the CF gene
The Correct Answer is A
A. Both parents are carriers of the CF gene: Cystic fibrosis follows an autosomal recessive inheritance pattern, meaning both parents must carry one copy of the defective gene, even if they do not have the disease themselves. The child inherits one copy of the defective gene from each parent to develop CF.
B. The inheritance pattern is multifactorial: CF is not a multifactorial disease; it follows a clear recessive genetic inheritance pattern.
C. The result is probably a genetic mutation: CF is caused by a genetic mutation, but this mutation is inherited from both parents. It is not usually a spontaneous mutation unless it occurs in the parental genetic material, which is rare.
D. Only one parent carries the CF gene: For the child to inherit CF, both parents must be carriers of the gene. If only one parent carries the gene, the child would be a carrier, not affected by the disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Temporal: The temporal pulse is difficult to palpate accurately in infants, so it is not the most reliable site to assess the pulse.
B. Dorsalis pedis: The dorsalis pedis pulse is located in the foot and is not as reliable for infants, as it can be difficult to palpate, especially in younger infants.
C. Apical: The apical pulse is the most reliable site to assess pulse in infants, as it is easily accessible and is directly over the heart. This is the preferred site for infants under 2 years old.
D. Carotid: The carotid pulse is sometimes used in emergencies but is not the most reliable or common site for routine pulse checks in infants, as it can be difficult to assess in younger infants.
Correct Answer is C
Explanation
A. Ice Hockey: Cold temperatures and physical exertion can trigger a sickle cell crisis by causing vasoconstriction and hypoxia.
B. Tackle American Football: High-impact, strenuous activities increase oxygen demand, putting the child at risk for a crisis.
C. Art Club: A non-strenuous activity that avoids physical strain, dehydration, or extreme temperatures, making it safe for children with sickle cell anemia.
D. Basketball: While it’s not as physically demanding as some sports, it still involves moderate to intense exertion, which could precipitate a crisis.
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