Diffusion And Active Transport

Question 1

What is a concentration gradient

Answer 1

Difference in concentration of particles

Question 2

What dies permeable mean

Answer 2

Substances cab pass through

Question 3

What doesnt passive mean

Answer 3

Doesn’t require energy

Question 4

Name a place where diffusion occurs

Answer 4

1.Lungs- gas exchange in the lungs of oxygen and carbon-dioxide

Question 5

Name 4 factors that affect the rate of diffusion

Answer 5

1. Temperature- higher the temperature the faster the movement
2. Concentration gradient - greater the difference faster the movement
   3.surface area of membrane- larger the surface area faster the movement
3. Thickness of membrane- thinner the membrane faster the movement

Question 6

Define turgid

Answer 6

When something is firm

Question 7

What is active transport

Answer 7

Movement of particles from an area of low concentration to an area of high concentration against a concentration gradient

Question 8

How is active transport released

Answer 8

Released through respiration of the mitochondria

Question 9

Why do we need active transport

Answer 9

1. To transport mineral ions into a plant root hairs from very dilute solutions in the soil
2. Allows sugar molecules to be absorbed from lo concentrations in the gut into the blood from a higher sugar gradient.

Question 10

Define osmosis

Answer 10

diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane