Movement into and out of cells

Question 1

Diffusion

Answer 1

the net movement of particles from their region of higher concentration to their region of lower concentration down their concentration gradient due to their random movement

Question 2

The energy for diffusion comes from

Answer 2

the kinetic energy of random movement of
molecules and ions.

Question 3

Some substances move into and out of cells by

Answer 3

diffusion through the cell membrane

Question 4

The role of Water

Answer 4

solvent in organisms during digestion, excretion and transport.

Question 5

Water diffuses through partially permeable membranes by

Answer 5

osmosis

Question 6

Water moves into and out of cells by osmosis through the

Answer 6

cell membrane

Question 7

Plants are supported by the pressure of

Answer 7

the water inside the cells pressing outwards on the cell wall.

Question 8

Osmosis

Answer 8

the net movement of water molecules from their region of higher water potential to their region of lower water potential down their water potential gradient through a partially permeable membrane

Question 9

a plant cell is placed in a less concentrated solution

Answer 9

water moves into the cell
down the water potential gradient by osmosis. pressure on the cell wall increase.
turgor pressure increase. cell wall prevents the cell from bursting.

Question 10

If a plant cell is placed in a more concentrated solution

Answer 10

water moves out of the cell
down the water potential gradient by osmosis. Pressure on the cell wall decrease.
turgor pressure decrease. the cell membrane pulls away from the cell wall. the cell
becomes flaccid. The cell is said to be plasmolyzed.

Question 11

Active transport

Answer 11

the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration against a concentration gradient using energy from respiration

Question 12

Protein carriers move molecules

Answer 12

or ions across a membrane during active transport.