THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They don’t swell because rain is absorbed by the roots.
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They have pores in their cell membranes that keep them from swelling.
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The rain water is hypertonic to the cells so the cells lose water.
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They have cell walls that keep them from swelling too much.
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Detailed explanation-1: -What protects carrot cells from swelling too much when it rains? They don’t swell because rain is absorbed by the roots. They have pores in their cell membranes that keep them from swelling. The rain water is hypertonic to the cells so the cells lose water.
Detailed explanation-2: -A cell that does not have a rigid cell wall, such as a red blood cell, will swell and lyse (burst) when placed in a hypotonic solution. Cells with a cell wall will swell when placed in a hypotonic solution, but once the cell is turgid (firm), the tough cell wall prevents any more water from entering the cell.
Detailed explanation-3: -Cell wall can withstand dilute hypotonic media and prevents bursting of cells. Therefore, plant cells withstand changes in environmental concentration much better than animal cells which get burst in such conditions.
Detailed explanation-4: -In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.
Detailed explanation-5: -The Cellular Membrane The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.