Transport of Gases

Which of the following is the main protein responsible for oxygen transport in blood?

• Myoglobin

• Hemoglobin

• Albumin

Oxyhaemoglobin readily forms in concentrations of oxygen which are

• high

• low

What is the percentage of oxygen that is carried by hemoglobin in the blood?

• 10%

• 30%

• 97%

How many oxygen molecules can one hemoglobin molecule bind with?

• One

• Two

• Four

What percentage of carbon dioxide is transported as bicarbonate ions?

• 70%

• 8%

• 22%

When carbon dioxide binds with haemoglobin, it forms...

• oxyhaemoglobin

• carbaminohaemoglobin

• bicarbonate ions

What percentage of oxygen is dissolved in plasma?

• 3%

• 30%

• 8%

Carbon dioxide and water combine to form

• bicarbonate ions

• carbonic acid

• dissolved CO2

An example of a location in which oxyhaemoglobin would readily break down is

• in alveoli of the lungs

• when passing through the aorta

• tissue fluid around cells

How does oxygen enter cells?

• By breaking down oxyhaemoglobin

• Diffusion

• Active transport