Science - Chapter 7.4

In the daytime, what net uptake is there?

net uptake of carbon dioxide

In the daytime, what net release is there?

Net release of oxygen

At night, what net uptake is there?

Net uptake of oxygen

At night, what net release is there?

Net release of carbon dioxide

What are the tiny pores on the leaf called?

stomata

State the correct order of the air flow in the breathing system.

nasal cavity\>trachea\>bronchi\>bronchioles\>air sacs

What are air sacs surrounded by?

blood capillaries

Where does gas exchange in humans occur?

lung

Is a pig's trachea hard or soft?

Hard

Inside the lung, what passes from the air sacs into the blood capillaries?

oxygen

Inside the lung, what passes from the blood into the air sacs?

carbon dioxide

What are some of the examples of harmful substances in cigarettes?

tar, nicotine, carbon monoxide

What are the harmful effects of tar?

It causes lung cancer, coughs and respiratory diseases

What are the harmful effects of nicotine?

It causes addiction and increases heart rate and blood pressure, leading to heart diseases in a long term

What are the harmful effects of carbon monoxide?

It reduces the oxygen content in blood

What is the singular form of stomata?

stoma