Cell Transport and Gas Exchange

Which of the following does NOT describe the surface across which gas exchange occurs in the mammalian lung?

• The surface must be moist, as gases must dissolve in water to diffuse across the membrane.

• The surface must have a greater concentration of the waste gas on the alveolar side of the membrane than the other, so the a concentration gradient is maintained.

• To provide adequate gas exchange, the surface must have a large SA:V

• To enable rapid diffusion of gas molecules, the surface must be thin and permeable.

The tiny air sacs located on the end of a bronchiole are called

• Aioli

• Alveoli

• Bronchioli

• Aerioli

What type of cell lines the alveolar wall?

• Epithelial cells

• Endometrial cells

• Endothelial cells

• Capillary cells

The correct order for the passage of air into the lungs is

• Bronchi - trachea - bronchioles - alveoli

• Bronchi- bronchioles - trachea - alveoli

• Trachea - bronchioles - bronchi - alveoli

• Trachea - bronchi - bronchioles - alveoli

What is the name of the network of tiny blood vessels called?

• Veins

• Arteries

• Capillaries

• Vessels

What is protein in red blood cells that carries oxygen?

• Haemoglobin

• Oxyglobin

• Erythrocyte

• Hemocyte

Which type of blood vessel carries blood away from the heart?

• Capillary

• Vein

• Artery

• Venule

When you breathe in, your alveoli fill up with oxygen from the air. Explain where the oxygen travels to next. (Remember: explain means how and why)

Tags

NGSS.HS-LS1-7

According to the table, predict the direction of oxygen movement from the capillary entering the muscle tissue and the muscle tissue. Provide reasons for your answer.

Tags

NGSS.HS-LS1-7

Explain the effect on (a) the speed of diffusion and (b) the number of molecules diffusing when there is a large difference in the partial pressure across two sites.