Chapter 8 Quiz 2

Most of the oxygen transported by the blood is carried in the ________________________ .

• blood plasma

• red blood cells

• white blood cells

• blood platelets

In the air sacs, oxygen binds to ________________ , forming oxyhaemoglobin.

• water

• iron

• haemoglobin

• calcium

In body tissues, oxygen diffuses into body cells. The blood becomes ___________________ and is dark purplish red in colour.

• oxygenated

• deoxygenated

A red blood cell is different from other body cells in the way that it does not have a ___________________ .

• cell membrane

• cell wall

• nucleus

• vacuole

Most carbon dioxide produced by body tissues reacts with water in red blood cells, forming ______________________ ions. These ions then diffuse from the red blood cells into the blood plasma.

• hydrogen

• hydrogencarbonate

• hydrogen peroxide

• dihydrogen monoxide

The graph shows the change in air pressure in the lungs of a person.

At point X, the lungs are expanding.

• True

• False

The graph shows the change in air pressure in the lungs of a person.

At point X, the intercostal muscles and diaphragm muscles are relaxing.

• True

• False

The graph shows the change in air pressure in the lungs of a person.

At point Y, inhalation occurs.

• True

• False

The graph shows the change in air pressure in the lungs of a person.

At point Y, the lung volume is the smallest.

• True

• False