Cells 2 quiz

A solution in an area would be described as hypotonic if it

had a lower concentration of solute than another area

A scientist places human blood cells into an unknown solution. After some time, the blood cells shrink and shrivel up. What type of solution were the blood cells likely placed in?

hypertonic solution

With cell walls, plant cells prefer the outside environment to be __________________ to their cells so that water rushes into the cells and creates water pressure to support the plant.

hypotonic

How carbon dioxide (or any other small, nonpolar molecule) be transported across the cell membrane from an area of high concentration to low concentration?

simple diffusion

Which of the following can be a general rule for predicting water movement?

water moves to the area of higher solute concentration

Which of the following is not a type of passive transport?

Exocytosis

Some substances such as sugars, amino acids, and ions move across the cell membrane from an area of high concentration to an area of low concentration using special proteins embedded in the membrane. Which of the following terms applies to this type of cell transport?

Facilitated Diffusion

Which of the following describes how phospholipid regions are positioned in the cell membrane?

Hydrophilic phosphate regions are positioned toward aqueous environments.

Which of the following describes the function of the sodium-potassium pump?

It pushes both sodium and potassium against the concentration gradient

The phospholipid bilayer is set up to block most particles from crossing through it. However, which of the following answer choices describe particles that CAN cross through the phospholipid bilayer?

Small nonpolar molecules like CO2

how substances are transported across the cell membrane?

Small uncharged molecules move across the cell membrane through embedded transport proteins.

Which of the following statements about passive transport is true?

Substances move from areas of high concentration to areas of low concentration.

Starch turns a blue-black color in the presence of iodine. Julian decides to use this information to test the permeability of some dialysis tubing. Julian fills the tubing with a starch solution and places it in a beaker of iodine and water. After two hours, the starch solution in the dialysis tubing turns blue-black. The iodine solution remains the same color (it doesn't change colors). What do Julian's results show about the permeability of the tubing?

The dialysis tubing is permeable to iodine but not to starch.

Hypotonic

a solution outside of a cell is called hypotonic if it has a lower concentration of solutes relative to the cytoso

A cell has a 5% salt concentration. It is placed into a solution with a 0.5% salt concentration. What will happen to the cell?

Water will move into the cell, causing it to swell.

How would a molecule of glucose be transported through the cell membrane?

facilitated diffusion