The diagram shows two cells from the lining of the trachea. The magnification is a diagram is × 750. Use a formula to calculate the actual length of cell P.

In the given Image the cell P is the ciliated cell and Cell R is the goblet cell of the lining of the trachea. The length of cell P on page is 80mm. The magnification is 750 times. Thus, the length of cell will be = 80 ÷ 750 = 0.107 mm

The diagram shows two cells from the lining of the trachea. The magnification is a diagram is × 750. Use a formula to calculate the actual length of cell P. Give your answer to the nearest micrometre.

In the given Image the cell P is the ciliated cell and Cell R is the goblet cell of the lining of the trachea. The length of cell P on page is 80mm. The magnification is 750 times. Thus, the length of cell will be = 80 ÷ 750 = 0.107 mm= 107μm

The diagram shows two cells from the lining of the trachea. Describe the role of cell P and Cell R in the gas exchange system.

In the given figure, the cells showing the cup-shaped depression are the goblet cells (labelled as R cells). The role of these cells in the respiratory tract is to secrete mucus that traps the foreign particles like dust, bacteria, viruses, pollen, etc., and prevent their entry into the alveoli or the gas exchange surface The cells labelled as P cells are the ciliated cells that beat back and forth to move the mucus towards the throat. These cells thus remove the mucus from the respiratory tract.

The following table shows the partial pressure of oxygen and carbon dioxide in four places in human body. Use the information given in the tables to describe the process of exchange between alveolar air and deoxygenated blood.

It is given that the partial pressure of oxygen (PO 2 ) in the alveoli is 13.9 while the same in the deoxygenated blood inside the blood capillaries is 5.3. The exchange of gases across the respiratory surfaces takes place by diffusion. The gases always diffuse from a region of high partial pressure to the region of low partial pressure. Thus, the oxygen will diffuse from the alveoli into the lung capillaries. Similarly, the partial pressure of carbon dioxide (PCO 2 ) in the alveolar air is 6 while in the lung capillaries is 5.3. Thus, the Co 2 will diffuse from deoxygenated blood of capillaries to the lung alveoli.

The following table shows the partial pressure of oxygen and carbon dioxide in four places in human body. Use the information given in the tables to describe the process of exchange between the oxygenated blood and respiring tissue.

It is given that the partial pressure of oxygen (PO 2 ) in the tissue fluid is 5.3 while the same in the oxygenated blood inside the blood capillaries surrounding them is 13.3. The exchange of gases across the respiratory surfaces takes place by the process of diffusion. The gases always diffuse from a region of high partial pressure to the region of low partial pressure. Thus, the oxygen will diffuse from the oxygenated blood of capillaries into the tissue fluid. Similarly, the partial pressure of carbon dioxide (PCO 2 ) in the tissue fluid is 6.0 while in the oxygenated blood of capillaries, it is 5.3. Thus, the Co 2 will be diffuse from the tissue fluid of respiring cells to the blood of capillaries surrounding the tissues.

Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS

Author:Mary Jones, Richard Fosbery, Dennis Taylor & Jennifer Gregory

Mary Jones Biology Solutions for Exercise - Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS

Attempt the practice questions on Chapter 9: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS with hints and solutions to strengthen your understanding. Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access solutions are prepared by Experienced Embibe Experts.

Questions from Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS with Hints & Solutions

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

The magnification is a diagram is $\times$ 750.

Use a formula to calculate the actual length of cell P.

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

The magnification is a diagram is $\times$ 750.

Use a formula to calculate the actual length of cell P. 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 6

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

Question Image

Describe the role of cell P and Cell R in the gas exchange system.

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 7

Explain the role of elastic fibres and smooth muscles in the gas exchange system.

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 8

The following table shows the partial pressure of oxygen and carbon dioxide in four places in human body.

Question Image

Use the information given in the tables to describe the process of exchange between alveolar air and deoxygenated blood.

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 8

The following table shows the partial pressure of oxygen and carbon dioxide in four places in human body.

Question Image

Use the information given in the tables to describe the process of exchange between the oxygenated blood and respiring tissue.

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 8

Explain why the composition of alveolar air remains fairly constant.

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 8

Suggest three ways in which the gas exchange system responds to the demands of exercise.

Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS

Mary Jones Biology Solutions for Exercise - Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS

Questions from Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Gas Exchange, Exercise 6: EXAM-STYLE QUESTIONS with Hints & Solutions

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