Diffusion

Q. The physical process directly involved in the release of molecular oxygen from leaves is

1. diffusion
2. transpiration
3. osmosis
4. active transport

Q. Simple diffusion does not require

1. concentration gradient
2. ATP
3. proteins
4. both b and c

Q. The movement of gases across the respiratory membrane depends on two major things:

1. Membrane thickness
2. Amount of haemoglobin
3. Rate of diffusion of each gas
4. Form in which each gas is transported in the blood

Q.

Energy required for the movement of a smaller molecule is less when compared to a larger molecule.

1. True

2. False

Q. Residual volume is

1. Greater than inspiratory volume
2. Greater than tidal volume
3. Greater than vital capacity
4. Lesser than tidal volume

Q.

When a drop of ink is added to water, it gets evenly distributed in sometime. This is by the process of

1. diffusion

2. osmosis

3. active transport

4. respiration

Q. Someone sprays an air freshener. The scent fills the air. This is an example of

1. Active transport
2. Passive transport
3. Diffusion
4. Breathing