Capillaries release oxygen and take up carbon dioxide from surrounding tissues through the process of?.
Osmosis.
Diffusion.
Filtration.
Colloid osmotic pressure.
.
The Correct Answer is B
Choice A rationale:
Osmosis is the process by which water molecules move from an area of high concentration to an area of low concentration across a semi-permeable membrane. It does not directly involve the exchange of oxygen and carbon dioxide in capillaries.
Choice B rationale:
Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. At the respiratory membrane, where the alveolar and capillary walls meet, gases move across the membranes, with oxygen entering the bloodstream and carbon dioxide exiting.
Choice C rationale:
Filtration is a process that separates particles from a liquid or gas, and it does not directly involve the exchange of oxygen and carbon dioxide in capillaries.
Choice D rationale:
Colloid osmotic pressure refers to the pressure exerted by proteins in a blood vessel’s plasma that usually tends to pull water into the circulatory system. It does not directly involve the exchange of oxygen and carbon dioxide in capillaries.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
HIV invades various immune cells, most notably CD4+ T cells, eventually destroying them.
Choice B rationale:
D cells are not a recognized category of immune cells, and HIV does not specifically invade them.
Choice C rationale:
While B cells are part of the immune system, HIV primarily targets CD4+ T cells, not B cells.
Choice D rationale:
Helper C cells are not a recognized category of immune cells, and HIV does not specifically invade them.
Correct Answer is D
Explanation
Choice A rationale:
Lymph nodes do not produce lymphatic fluid, they filter it.
Choice B rationale:
Lymph nodes do not filter blood plasma to remove excess white blood cells. They filter lymphatic fluid to remove foreign invaders.
Choice C rationale:
While lymph nodes do contain cells that can produce antibodies, this is not their main function.
Choice D rationale:
The main function of lymph nodes is to filter lymphatic fluid and remove pathogens and foreign material.
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