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Red blood cells are preferred for osmolarity studies because they:
ALack the controls that limit water uptake
BCarry more cholesterol than other cells
CHold the largest nucleus of any cell
DDivide much faster than other body cells
Answer & Solution
Correct answer: A. Lack the controls that limit water uptake
1. Most cells have mechanisms to prevent them from taking on too much water.
2. Those mechanisms would mask the effect an experimenter wants to observe.
3. Red blood cells lack these controls, making them ideal for osmolarity studies.
4. Mature red blood cells have no nucleus at all, which rules out option C.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 5 'Structure and Function of Plasma Membranes', sections 5.1-5.4_
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