HARD
AS and A Level
IMPORTANT
Earn 100
Explain the role of smooth muscles in the gas exchange system.
Important Questions on Gas Exchange
HARD
AS and A Level
IMPORTANT
Explain why there are so many alveoli in the lungs.
HARD
AS and A Level
IMPORTANT
Use the given figure, to make a labelled diagram of the epithelium of the trachea (Assume that the distance measured on page is 60mm). Indicate the actual depth of the epithelium and show your calculation. (TEM magnification 1300)
HARD
AS and A Level
IMPORTANT
Goblet cells are surrounded by ciliated epithelial cells in the gas exchange system. They are also found in the small intestine where they are surrounded by cells with microvilli. What are the similarities and differences between the cilia and microvilli?
HARD
AS and A Level
IMPORTANT
Describe in detail that can be seen in a TEM of a ciliated epithelial cell that cannot be seen under high power with a light microscope.
HARD
AS and A Level
IMPORTANT
Describe the pathway taken by a molecule of oxygen as it passes from the atmosphere to the lungs.
HARD
AS and A Level
IMPORTANT
Explain how alveoli are adapted for gas exchange.
HARD
AS and A Level
IMPORTANT
Explain the advantage of being able to adjust the diameter of bronchioles.
HARD
AS and A Level
IMPORTANT
How many times does an oxygen molecule cross a cell surface membrane as it moves from the air into a red blood cell, Explain your answer.
