Use the given dissociation curve in the given figure and answer the question: If 1 gm of fully saturated haemoglobin is combined with 1.3 cm 3 of oxygen, how much oxygen will 1 gm of haemoglobin in the capillaries in the lungs be combined with?

One molecule of haemoglobin can combine with eight oxygen molecules. In the pulmonary capillaries, the haemoglobin is almost fully saturated (98%) with oxygen due to the high partial pressure of oxygen in the lungs. So the saturation of haemoglobin in the lung capillaries will be almost equal to 1.3 cm 3 .

Use the given dissociation curve in the given figure and answer the question: How much oxygen will 1 gm of haemoglobin in the capillaries of this muscle be combined with?

One molecule of haemoglobin can combine with eight oxygen molecules. In the respiratory tissues like muscles, the partial pressure of oxygen is low while in the capillaries that bring blood from the lungs the PO 2 is high. The haemoglobin loses oxygen into the tissues (muscles) haemoglobin. As the haemoglobin reaches the muscles, it releases around three-quarters of the oxygen bound to it. Thus, we can say that the saturation of haemoglobin in the tissues will be almost equal to one-third of 1.3 cm 3 (0.43 cm 3 )

E M B I B E

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions

Mary Jones, Richard Fosbery, Dennis Taylor and, Jennifer Gregory Solutions for Chapter: Transport in Mammals, Exercise 9: 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: Transport in Mammals, Exercise 9: Questions

Attempt the practice questions on Chapter 8: Transport in Mammals, Exercise 9: 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: Transport in Mammals, Exercise 9: Questions with Hints & Solutions

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions>Q 12

Use the given dissociation curve in the given figure and answer the question:

The partial pressure of oxygen in the alveoli of the lungs is about 12kPa. What is the percentage saturation of haemoglobin in the capillaries in the lungs?

Question Image

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions>Q 12

Use the given dissociation curve in the given figure and answer the question:

Question Image

If 1 gm of fully saturated haemoglobin is combined with 1.3 cm³ of oxygen, how much oxygen will 1 gm of haemoglobin in the capillaries in the lungs be combined with?

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions>Q 12

Use the given figure and answer the question:

Question Image

The partial pressure of oxygen in an actively respiring muscle is about 2 KPa. What is the percentage saturation of haemoglobin in the capillaries of such a muscle?

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions>Q 12

Use the given dissociation curve in the given figure and answer the question:

Question Image

How much oxygen will 1 gm of haemoglobin in the capillaries of this muscle be combined with?

HARD

AS and A Level

IMPORTANT

Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 8 - Transport in Mammals>Questions>Q 13

Build up a list of three ways that the haemoglobin is related to its function as an oxygen transport molecule in the blood. Give a brief explanation of how the structure of haemoglobin helps it to carry out its functions.

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