Excessive loss of water from the extracellular fluid (ECF) leads to a rise in osmotic pressure in the ECF which causes cells to shrink as water leaves by osmosis.
True
False
The Correct Answer is A
True: When the ECF becomes hypertonic due to water loss (e.g., dehydration), water moves out of the cells into the ECF by osmosis, causing cellular shrinkage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Brain: While amino acids are important in brain metabolism, oxidative deamination primarily occurs in the liver.
B. Blood: The blood transports nitrogenous waste, but deamination doesn’t occur here.
C. Liver: The liver is the major site of oxidative deamination, where amino acids are stripped of their amino groups, forming ammonia, which is then converted to urea.
D. Muscles: Muscles may perform transamination, but oxidative deamination is mainly hepatic.
Correct Answer is A
Explanation
A. Hydrostatic pressure of capillary blood: This pushes water out of capillaries into the interstitial space-it's the main driver of filtration at the arterial end of capillaries.
B. Osmotic pressure of plasma proteins: This pulls water back into capillaries, opposing outward flow.
C. Hydrostatic pressure of interstitial fluid: This would oppose outward filtration if significant, but it's usually low.
D. Intracellular hydrostatic pressure: This is not relevant to capillary filtration, which occurs between plasma and interstitial fluid.
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