IS_Section Quiz_7.4_e

Net gas exchange in plants depends on the relative rates of photosynthesis and respiration.

• True

• False

(E) Stomata are found on the leaf epidermis.

• True

• False

When we breathe in, air first enters our bronchi.

• True

• False

Nicotine in cigarette smoke causes addiction.

• True

• False

(E) Stoma closes when guard cells are full of water.

• True

• False

Exhaled air turns hydrogencarbonate indicator from red to yellow.

• True

• False

Gas exchange is a physical process.

• True

• False

(E) The large number of air sacs provides a large surface area for gas exchange to take place.

• True

• False

(E) The cilia in the airway help sweep mucus towards the lung.

• True

• False

When do plants have a net uptake of oxygen?

• A. In the daytime

• B. At night

• C. In the daytime and at night

• D. Never