Multiple Choice
What is the osmolarity of the filtrate at the end of the proximal tubule?
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2. Cell Chemistry & Cell Components
Osmosis
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What happens to body cells when they are placed in a hypertonic solution?
A
They swell and burst due to water influx.
B
They become turgid due to increased internal pressure.
C
They remain unchanged as there is no net water movement.
D
They shrink due to water efflux.
Verified step by step guidance1
Understand the concept of tonicity: Tonicity refers to the ability of a surrounding solution to cause a cell to gain or lose water. It is determined by the concentration of solutes outside the cell compared to inside the cell.
Define a hypertonic solution: A hypertonic solution has a higher concentration of solutes compared to the inside of the cell. This means there is less water outside the cell than inside.
Consider the movement of water: Water moves across cell membranes by osmosis, which is the movement of water from an area of lower solute concentration to an area of higher solute concentration.
Predict the direction of water movement: In a hypertonic solution, water will move out of the cell to the area of higher solute concentration, which is outside the cell.
Determine the effect on the cell: As water leaves the cell, the cell will lose volume and shrink, a process known as crenation in red blood cells.
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