A nurse is discussing the role of the cystic fibrosis transmembrane conductance regulator (CFTR) protein with a patient. What is the primary function of the CFTR protein in normal physiology?

"The CFTR protein regulates sodium absorption in the kidneys."

"The CFTR protein facilitates chloride secretion in the gastrointestinal tract."

"The CFTR protein controls the production of red blood cells in the bone marrow."

"The CFTR protein regulates mucus production and the movement of chloride ions in the respiratory and digestive systems."

Answer and Explanation

The Correct Answer is D

A) Incorrect. The CFTR protein primarily functions in the respiratory and digestive systems, not the kidneys.

B) Incorrect. While CFTR plays a role in chloride secretion, its primary role is related to mucus production and chloride ion movement in the respiratory and digestive systems.

C) Incorrect. The CFTR protein is not involved in the production of red blood cells.

D) Correct. The CFTR protein is responsible for regulating mucus consistency and chloride ion transport in the respiratory and digestive systems.

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Correct Answer is C

Explanation

A) Incorrect. CF is not caused by an extra chromosome; it is a genetic disorder resulting from mutations in specific genes.

B) Incorrect. CF is not characterized by a duplication of the CFTR gene but rather by various mutations in this gene.

C) Correct. CF is primarily caused by mutations in the CFTR (cystic fibrosis transmembrane conductance regulator) gene, leading to the production of dysfunctional chloride channels.

D) Incorrect. CF is not characterized by the absence of the CFTR gene; instead, it involves various mutations in this gene.

A. Limit carbohydrate intake to control blood sugar levels. B. Increase sodium intake to maintain electrolyte balance. C. Consume a high-calorie diet rich in fats and proteins. D. Restrict fluid intake to prevent excessive mucus production.

Correct Answer is C

Explanation

A) Incorrect. While monitoring carbohydrate intake is important in CF, limiting carbohydrates is not the primary focus of nutrition management.

B) Incorrect. Increasing sodium intake is not a general recommendation for individuals with CF; it depends on the individual's needs.

C) Correct. Individuals with CF often require a high-calorie diet rich in fats and proteins to address malabsorption and maintain adequate nutrition.

D) Incorrect. Restricting fluid intake is not recommended for individuals with CF, as staying hydrated is important for preventing thickening of mucus.

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A nurse is discussing the role of the cystic fibrosis transmembrane conductance regulator (CFTR) protein with a patient. What is the primary function of the CFTR protein in normal physiology?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is discussing the underlying genetic defect in cystic fibrosis (CF) with a client. Which of the following statements accurately describes the primary genetic abnormality in CF?

Correct Answer is C

Explanation

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Correct Answer is C

Explanation

A nurse is providing education to a client with cystic fibrosis (CF). Which dietary recommendation is most appropriate for the client?

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