AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment.What conditions cause the contractile vacuole to fill with water?
A
The concentration of water is greater outside the cell than inside the cell
B
The temperature of water in the vacuole is higher than the temperature of its environment
C
The concentration of water inside the cell is the same as the concentration outside the cell
D
The temperature of water in the vacuole is lower than the temperature of its environment.
Explanation: 

Detailed explanation-1: -Answer: The concentration of water is greater outside the cell than inside the cell. Explanation: In living cells, water moves by Osmosis across the cell membrane, which acts as the semi-permeable membrane.

Detailed explanation-2: -The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment. What conditions cause the contractile vacuole to fill with water? The concentration of water is greater outside the cell than inside the cell.

Detailed explanation-3: -The contractile vacuole acts as part of a protective mechanism that prevents the cell from absorbing too much water and possibly lysing (rupturing) through excessive internal pressure. The contractile vacuole, as its name suggests, expels water out of the cell by contracting.

Detailed explanation-4: -Which conditions cause the contractile vacuole to fill with water? The concentration of water is greater outside the cell than inside the cell. The temperature of water in the vacuole is higher than the temperature of its environment.

Detailed explanation-5: -Experiment: The contractile vacuole is a star-shaped structure that helps the paramecium to pump out excess water. This adaptation allows the paramecium to survive in hypotonic (low solute concentration) solutions.

There is 1 question to complete.