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A nurse is teaching a class about oxygen transport in the cardiopulmonary system. Which of the following transports oxygen in the blood?

A.

Lymphocytes

B.

Neutrophils

C.

Platelets

D.

Hemoglobin

Answer and Explanation

The Correct Answer is D

A.    Lymphocytes are a type of white blood cell that plays a crucial role in the immune system, specifically in the response to infections and in immune regulation. They do not have a role in the transport of oxygen in the blood.
B.    Neutrophils are another type of white blood cell that is essential for fighting bacterial infections. They are part of the body's immune response but do not transport oxygen.
C.    Platelets are small cell fragments that are crucial for blood clotting and wound repair. They do not have a role in oxygen transport.
D.    Hemoglobin is the primary molecule responsible for transporting oxygen in the blood. It is a protein found in red blood cells (erythrocytes) that binds to oxygen in the lungs and releases it in tissues throughout the body. Hemoglobin carries the majority of oxygen in the bloodstream and is essential for effective oxygen transport and delivery.
 


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Related Questions

Correct Answer is D

Explanation

A. This is associated with iron deficiency anemia, not COPD.
B. While peripheral edema can occur in advanced COPD due to right-sided heart failure (cor pulmonale), it's not a typical early finding.
C. This is associated with inflammation of the pleural layers, typically due to pneumonia or pleurisy, not COPD.
D. Barrel chest is a classic sign of COPD, resulting from air trapping in the lungs, causing the chest to become hyperinflated

Correct Answer is B

Explanation

According to the recommended dosage range of 20 to 25 mg/kg/day for a toddler weighing 20 kg, the daily dosage should be between 400 mg (20 kg x 20 mg) and 500 mg (20 kg x 25 mg).

Therefore, the prescribed dosage of 300 mg per day is below the recommended range.

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