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1 The diagram shows the human gas exchange system.
The list shows the names of some of the parts of the human gas exchange system.
alveolus bronchiole bronchus diaphragm
larynx rib trachea
Use the words from the list to label the diagram.
You do not need to use every word.
Write your answers on the answer lines provided in the diagram.. [5]
[Total: 5]
2 Complete the sentences about the differences between inspired and expired air.
Inspired air contains .......................................... oxygen than expired air.
Inspired air contains .......................................... carbon dioxide than expired air.
The concentration of water .......................................... in inspired and expired air varies. [3]
[Total: 3]
2
3 The diagram shows part of the gas exchange system in the lungs of a human.
State the letter in the diagram that shows where the concentration of:
• carbon dioxide in the blood is highest ........................
• oxygen in the blood is highest .................................... [2]
[Total: 2]
4 Breathing involves the movement of the ribs and the diaphragm.
Describe the process of inspiration.
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3
[Total: 4]
5 Energy is used to maintain body temperature.
State three other uses of energy in humans.
1 ...............................................................................................................................................
2 ...............................................................................................................................................
3 ............................................................................................................................................... [3]
[Total: 3]
6 Complete the sentences about aerobic and anaerobic respiration.
Use words or phrases from the list.
Each word or phrase may be used once, more than once, or not at all.
carbon dioxide carbon monoxide energy
fatty acids glycerol guard lactic acid
mesophyll muscle nitrogen oxygen
Anaerobic respiration is different to aerobic respiration because ...........................................
is not needed to break down glucose molecules.
The amount of ........................................ released from each glucose molecule is much
smaller in anaerobic respiration.
Anaerobic respiration in humans takes place in ................................. cells during vigorous
exercise. It produces ..................................... from glucose.
A different form of anaerobic respiration takes place in yeast cells. Here the glucose is
broken down into alcohol and ................................... .
[5]
[Total: 5]
4
7 White blood cells are one of the components of blood.
State two other main components of blood.
1 ...............................................................................................................................................
2 ............................................................................................................................................... [2]
[Total: 2]
8 The table shows some information about the functions of the components of blood.
Complete the table.
function type of cell
production of antibodies
phagocyte
promotes blood clotting
transports oxygen
[4]
[Total: 4]
9 Describe the similarities and differences between anaerobic respiration in yeast and aerobic
respiration in humans.
similarities ................................................................................................................................
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differences ................................................................................................................................
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5
[Total: 4]
10 A student investigated the rate of oxygen uptake during aerobic respiration in woodlice. Woodlice
are arthropods.
State the word equation for aerobic respiration.
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[Total: 2]
