The given diagram shows the alveoli: Name the fluid at D.

The given diagram shows the gas exchange surface of the lungs. It comprises the alveolar wall made of simple squamous epithelium surrounded by thin-walled blood vessels called capillaries. The part labelled as D in the figure is the fluid present inside the pulmonary blood capillaries is the fluid connective tissue called " blood"

The diagram shows two cells from the lining of the trachea. Name the cells P and R.

Trachea is the part of respiratory system that is present between the larynx and bronchi. It is also called windpipe. The wall of trachea contains three types of cells, the goblet cells, the cilia cells and the basal cells. In the given figure, the cells showing the cup shaped depression are the goblet cells (labelled as R cells) The cells labelled as P cell are the cilia cells that beat the cilia and remove the mucus from respiratory tract.

The diagram shows two cells from the lining of the trachea. Name the structures S, T, U and W.

Trachea is the part of respiratory system that is present between the larynx and bronchi. It is also called windpipe. The wall of trachea contains three types of cells, the goblet cells, the cilia cells and the basal cells. In the given figure, the cells showing the cup shaped depression are the goblet cells (labelled as R cells) and the cells labelled as P cell are the cilia cells that beat the cilia and remove the mucus from respiratory tract. The structures labelled as S, T, U and W are: S -Cilia T- Mitochondria U- Golgi body W- Nucleus

The diagram shows two cells from the lining of the trachea. Why cell P contains many of the structures labelled as T.

In the given figure of the cells in the lining of the trachea, the cells labelled as R cells are called the goblet cells and the cells labelled as P cells are the cilia cells that beat the cilia and remove the mucus from the respiratory tract. The structures labelled as S, T, U and W are: S -Cilia T- Mitochondria U- Golgi body W- Nucleus Mitochondria are abundant in the cilia cell of the trachea because it produces the energy in form of ATP, which is required for the ciliary beating. These cells push back the mucus towards the throat and prevent its entry into the lungs.

E M B I B E

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

HARD

AS and A Level

IMPORTANT

Earn 100

The given diagram shows the alveoli:

Name the cell A, B and C.

Important Questions on Gas Exchange

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

The given diagram shows the alveoli:

Question Image

Name the fluid at D.

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

The given diagram shows the alveoli:

Question Image

The length of the scale bar is 13mm.
Calculate the actual distance indicated by X-Y; Write out the formula that you will use.

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

The given diagram shows the alveoli:

Question Image

The length of the scale bar is 13mm.
Calculate the actual distance indicated by X-Y; Write out the formula that you will use. Use the formula to calculate the actual distance.

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

The given diagram shows the alveoli:

Question Image

The length of the scale bar is 13mm.
Calculate the actual distance indicated by X-Y; Use the formula to calculate the actual distance. Give your answer to the nearest micrometre.

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 5

Explain how alveoli are adapted for the exchange of gases.

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 9 - Gas Exchange>EXAM-STYLE QUESTIONS>Q 6

The diagram shows two cells from the lining of the trachea.

Question Image