transport in cells

Question 1

Diffusion

Answer 1

Spreading out of particles of any substances in solution or particles of gas, resulting in net movement from area of high concentrations to an area of low concentration.

Question 2

What substances does diffusion move

Answer 2

Oxygen and carbon dioxide with urea as the waste product from blood plasma excreted in kidney

Question 3

Factors affecting rate of diffusion

Answer 3

Concentration gradient, temperature, SA of membrane

Question 4

An effective exchange surface has:

Answer 4

Large SA, thin cell wall, efficient blood supply, well ventilated

Question 5

Osmosis

Answer 5

The diffusion of water from a dilute to a more concentrated solution through a partially permeable membrane allowing passage of other water molecules

Question 6

Active transport

Answer 6

Moves substances from a high to low concentrated solution. And requires energy from respiration

Question 7

When is active transport used

Answer 7

Allows mineral ions to be absorbed into plant root hairs and allows sugar molecules to be absorbed in the gut into the blood

Question 8

Gaseous exchange info

Answer 8

The lungs are in the upper part of the body, protected by the rib cage and separated from the lower part of the body by the diaphragm.