Oxygenated blood

Instructions 

  • Question One will help you to read the chart carefully. Decide your answers and write them on the question sheet.
  • Question Two asks you to interpret the information on the chart.
  • Question Three asks you to say what this information means in a real context. Make sure you consider every option carefully before you justify your choice.

Availability and use of oxygen for a healthy person and for a person suffering from oxygen deficiency.

  Haemoglobin
(red pigment)
content of blood
(g/100 cm3 of blood)		 Oxygen
content of arterial blood
(cm3/100 cm3 of blood)		 Oxygen
content of venous blood
(cm3/100 cm3 of blood)		 Volume of
blood pumped
by heart
(dm3/minute)		 Total amount of blood in body
(L)
Healthy person 15.0 19.0 15.0 5.0 4.8
Oxygen-deficient person 8.0 9.5 6.5 7.0 4.8

Question One: Making meaning from the chart  

a)
Draw a line from each word to the correct definition.  
 

Venous
  •  
  
  • something to do with arteries
Arterial
  •  
  
  • the name for the pigment inside red blood cells
Haemoglobin
  •  
  
  • to have a shortage of something

Deficient
  •  
  
  • something to do with veins
 
b)
 
How much blood does the heart of a healthy person pump every minute?__________
 
c)
What is the total volume of blood that circulates around the body of a healthy person?
 
______________________________
 
d) How much haemoglobin is found in each cubic centimetre of the blood of a healthy person?
 
______________________________
   
 
 
 
 
Question Two: Interpreting the chart
 
a)
How would you describe the way the heart has to work when a person is oxygen deficient? 
(Use the information on the chart to support your answer.)
 
 
 
 
 
 
 
 
 
b) From the chart, describe three other differences between a healthy person and an oxygen deficient person.

1. ____________________________________________________________________________

2. ____________________________________________________________________________

3. ____________________________________________________________________________
 

Question Three: What caused the oxygen deficiency?
 
a) Use the evidence from questions 1 and 2 to decide which is the most likely cause of the oxygen deficiency. The person:

(A)  is living in an area of high altitude where there is much less atmospheric oxygen
(B)  is suffering from iron deficiency
(C)  has suffered severe blood loss
(D)  has something wrong with their lungs

 
b)
Explain why you gave this answer.