Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
The most important mechanism for capillary exchange is?.
A. Diffusion.
Diffusion is the primary mechanism for capillary exchange. It allows small molecules, such as gases, lipids, and lipid-soluble molecules, to move directly through the membranes of the endothelial cells of the capillary wall.
B. Filtration.
Filtration is a pressure-driven mechanism that moves volumes of fluid from an area of higher pressure in a capillary bed to an area of lower pressure in the tissues. However, it is not the primary mechanism for capillary exchange.
C. Gravity.
Gravity does not play a direct role in capillary exchange.
D. Colloid osmotic pressure.
Colloid osmotic pressure is a type of pressure that interacts with hydrostatic pressure to drive fluid movement in capillaries. However, it is not the primary mechanism for capillary exchange.
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Full Explanation
Choice A rationale:
Diffusion is the primary mechanism for capillary exchange. It allows small molecules, such as gases, lipids, and lipid-soluble molecules, to move directly through the membranes of the endothelial cells of the capillary wall.
Choice B rationale:
Filtration is a pressure-driven mechanism that moves volumes of fluid from an area of higher pressure in a capillary bed to an area of lower pressure in the tissues. However, it is not the primary mechanism for capillary exchange.
Choice C rationale:
Gravity does not play a direct role in capillary exchange.
Choice D rationale:
Colloid osmotic pressure is a type of pressure that interacts with hydrostatic pressure to drive fluid movement in capillaries. However, it is not the primary mechanism for capillary exchange.
Similar Questions
The vessels that carry blood to the heart from the lungs are?.
A. Sinusoids.
Sinusoids are a type of capillary found in some organs, not vessels that carry blood to the heart from the lungs.
B. Arteries.
Arteries typically carry oxygenated blood away from the heart to the body’s tissues, not to the heart from the lungs.
C. Veins.
Veins, specifically the pulmonary veins, carry oxygenated blood from the lungs to the heart.
D. Arterioles.
Arterioles are small branches of arteries that lead to capillaries, not vessels that carry blood to the heart from the lungs.
Full Explanation
Choice A rationale:
Sinusoids are a type of capillary found in some organs, not vessels that carry blood to the heart from the lungs.
Choice B rationale:
Arteries typically carry oxygenated blood away from the heart to the body’s tissues, not to the heart from the lungs.
Choice C rationale:
Veins, specifically the pulmonary veins, carry oxygenated blood from the lungs to the heart.
Choice D rationale:
Arterioles are small branches of arteries that lead to capillaries, not vessels that carry blood to the heart from the lungs.
The trachea branches into the:.
A. Primary bronchi, one to each lung.
The trachea divides into two primary bronchi, one for each lung.
B. Secondary bronchi, one to each lung.
The trachea does not directly branch into secondary bronchi. Choices C and D rationale: The trachea does not branch into an uneven number of bronchi for the right and left lungs.
C. Primary bronchi, two right and one left.
D. Secondary bronchi, two right and one left.
Full Explanation
Choice A rationale:
The trachea divides into two primary bronchi, one for each lung.
Choice B rationale:
The trachea does not directly branch into secondary bronchi. Choices C and D rationale: The trachea does not branch into an uneven number of bronchi for the right and left lungs.
In which lymphatic organ do T cells mature?.
A. Thymus.
T cells mature in the thymus.
B. Red bone marrow.
While red bone marrow is where all blood cells, including T cells, originate, T cells specifically mature in the thymus. Choices C and D rationale: Tonsils and the spleen are parts of the lymphatic system, but they are not where T cells mature. So, the correct answer is Choice A, after analyzing all choices.
C. Tonsils.
D. Spleen.
Full Explanation
Choice A rationale:
T cells mature in the thymus.
Choice B rationale:
While red bone marrow is where all blood cells, including T cells, originate, T cells specifically mature in the thymus. Choices C and D rationale: Tonsils and the spleen are parts of the lymphatic system, but they are not where T cells mature.
So, the correct answer is Choice A, after analyzing all choices.