Transport in cells

Question 0

What happens to the diffusion rate if the concentration gradient is bigger ?

Answer 0

The diffusion rate is greater and happens quicker

Question 1

What is diffusion?

Answer 1

Diffusion is the net movement of particles from a high concentration to a lower concentration

Question 2

Does diffusion only happen in liquids and gases?

Answer 2

Yes

Question 3

Name 3 small molecules that can diffuse through a cell membrane

Answer 3

Glucose
Amino acids
Water
Oxygen

Question 4

What is osmosis?

Answer 4

Osmosis is the net movement of water molecules from a higher water concentration to a lower water concentration across a semi permeable membrane

Question 5

If there is not much water in a cell will water move in or out of the cell?

Answer 5

Shortage of water in the cell cause water to move in to the cell

Question 6

What does turgid cell mean?

Answer 6

Turgid cells are cells full of water.

Question 7

What is turgor pressure?

Answer 7

When the substance inside a cell push on the cell walls.this is called turgor pressure

Question 8

What is a flaccid plant cell?

Answer 8

A plant cell that is wilting due to loss of water and therefore there is no turgor pressure

Question 9

Describe a diffusion experiment

Answer 9

1) cut some pink agar jelly up into cubes
2) place in hydrochloric acid
3) time how long it will take to diffuse

The hydrochloric acid will diffuse into the cubes turning them from pink to clear

Question 10

What is a living organism that can be used to test for osmosis ?

Answer 10

Potato cylinders

Question 11

In an osmosis experiment. If the potato cylinders have got longer will they have drawn in water from osmosis or is water drawn out by osmosis?

Answer 11

Drawn in water from osmosis

Question 12

Is visking tubing an example of non living or living experiment for osmosis?

Answer 12

Non living system

Question 13

Why is the visking tubing semipermeable in an osmosis experiment?

Answer 13

So that water can be drawn in by osmosis

Question 14

What Is active transport?

Answer 14

Active transport is the movement of particles against the concentration gradient. From a lower concentration to a higher concentration using energy released by respiration

Question 15

Does active transport require more energy than diffusion or less energy than diffusion?

Answer 15

More energy

Question 16

What are the 3 factors that affect the movement of substances in and out if cells?

Answer 16

Surface area to volume ratio
Temperature
Concentration

Question 17

If there is a greater concentration gradient will the rate of movement of substances be faster or slower?

Answer 17

Faster