How it Works
Try Naxlex NCLEX-RN (Free-Trial)

How is most oxygen transported in the blood?

A.

Dissolved in plasma

B.

By hemoglobin

C.

By bicarbonate

D.

By pulmonary surfactants

Answer and Explanation

The Correct Answer is B

A. Dissolved in plasma- only ~1.5% of oxygen is dissolved in plasma.

B. By hemoglobin- ~98.5% of oxygen binds to hemoglobin in red blood cells.

C. By bicarbonate- this primarily transports carbon dioxide, not oxygen.

D. By pulmonary surfactants- surfactant reduces surface tension in alveoli, not related to oxygen transport in blood.


Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Free Nursing Study Resources

Related Questions

Correct Answer is C

Explanation

A. Surrounded by rings of cartilage: Only the larger bronchi are surrounded by cartilage; bronchioles and alveoli are not.

B. Upper respiratory structures: These are part of the lower respiratory tract.

C. Collectively referred to as the bronchial tree: This is the correct term for the branching airway system from the trachea to alveoli.

D. The sites of the exchange of respiratory gases: Only the alveoli are directly involved in gas exchange.

Correct Answer is D

Explanation

A. Bronchial tree: The bronchial tree refers to the entire system of airways including the trachea, bronchi, and bronchioles.

B. Bronchioles: Bronchioles are smaller airways that arise from bronchi and do not contain cartilage. They are located further down the respiratory pathway, closer to labels #5 or #6.

C. Alveoli: Alveoli are the tiny air sacs at the very end of the respiratory tract where gas exchange occurs. They are shown at label #7, not #3.

D. Bronchi: Bronchi are the major air passages that branch off from the trachea. Label #3 is pointing to a structure at this level-larger than bronchioles but smaller than the trachea. It is one of the primary or secondary bronchi.

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Register