Tag: movement in and out of the cell

Questions Related to movement in and out of the cell

In a hypertonic solution, a cell's water pressure

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. Increases

  2. First increases and then decreases

  3. Decreases

  4. Does not change

Show answer
Correct Option: C
Explanation:

A Hypertonic solution is a solution with a higher concentration of solutes greater on outside the cell than inside. Since the concentration of water is higher within the cell, there is a net movement of water from inside to outside of the cell (water leaves the cell by osmosis). This causes the cell to shrink as its internal pressure decreases. Thus, the correct answer is option C.

What would be the consequence for a cell placed in a salt solution?

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. The cells remained unchanged.

  2. Water moves from inside of the cell to the outside.

  3. Water moves from outside of the cell to the inside.

  4. The cells burst.

  5. The cells dissolve.

Show answer
Correct Option: B
Explanation:
Cells placed in hypertonic solution (salt solution) will shrink. Water moves from a high water concentration inside the cell to a low water concentration outside of the cell by osmosis.

When a cell is placed in 0.25 M concentrated sugar solution, there is no change in it. So the external solution is called 

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. Hypertonic

  2. Isotonic

  3. Hypotonic

  4. None of the above

Show answer
Correct Option: B
Explanation:

There are three types of solutions that can occur in your body based on solute concentration: isotonic, hypotonic, and hypertonic. 

A hypertonic solution is one where the concentration of solute is greater outside the cell than inside the cell. An isotonic solution is one in which the concentration of solute is the same both inside and outside of the cell and a hypotonic solution is one in which the concentration of solute is greater inside the cell than outside of it.
So, when the cell is placed in 0.25 M concentrated sugar solution and there is no change in it, the external solution is isotonic, i.e it has the same concentration of 0.25M.
Thus, the correct answer is option (B). 

Why does the skin of your finger shrink, when you wash clothes for a long time?

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. Soap is hypotonic, so water is moved out of finger by osmosis.

  2. Soap is hypertonic, so water is moved out of finger by osmosis.

  3. Soap is isotonic, so water is moved into finger by osmosis.

  4. Finger skin is very tender.

Show answer
Correct Option: B
Explanation:
  • Soap contains a lot of solutes. Hence, when washing clothes, solute concentration is more in soap water than in cells of hand. Due to this, the water molecules present in cells of hand move out in soap solution. 
  • This is an osmotic process in which the water molecules move from lower solute concentration to higher solute concentration, i.e., from dilute solutions to concentrated solution through a semi-permeable membrane. Soap is a hypertonic solution with high amounts of salts. 

When a cell is placed in a hypertonic solution:

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. solute exits the cell to equalize the concentration on both sides of the membrane

  2. water exits the cell toward the area of lower solute concentration

  3. water exits the cell toward the area of higher solute concentration

  4. solute exits and water enters the cell

Show answer
Correct Option: C
Explanation:

A hypertonic solution is a solution which has higher osmotic pressure i.e; having more solute concentration outside the cell than inside. When a cell is placed in a hypertonic solution, the water moves to the surrounding from inside the cell as it moves from higher water concentration to lower water concentration.

So, the correct option is 'water exits and solute enters the cell'.

When Amoeba is placed in a hypertonic medium, it 

biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

  1. Shrinks

  2. Swells

  3. Bursts

  4. No change

Show answer
Correct Option: A
Explanation:

If Amoeba is kept in a hypertonic solution, then exosmosis occurs in which, the water molecules move from inside of the cell to outside of the cell through the cell membrane and thus, Amoeba will shrink because water moves from the region of higher concentration to the region of lower concentration region.