11. Gas exchange in humans
A section of Biology, 0610
Listing 10 of 291 questions
shows a diagram of the gas exchange system. alveoli Complete the labelling of using the words from the list. bronchiole diaphragm intercostal muscle trachea Alveoli are gas exchange surfaces. State two features that make alveoli good gas exchange surfaces. There is less oxygen in expired air than in inspired air. Describe two other ways in which expired air is different from inspired air. State the name of a process that uses oxygen in the body. State an example of a cell and an organ from the gas exchange system. cell organ
0610_s18_qp_32
THEORY
2018
Paper 3, Variant 2
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is a diagram of the human gas exchange system. A region B Identify using a label line and a label on : • a lung • the diaphragm. State the name of structure A in . Oxygen molecules pass through structure A on their way to the red blood cells. State the names of three other structures in the gas exchange system that oxygen molecules must pass through on their way to the red blood cells. State the name of the process that moves oxygen into the red blood cells. is a magnified image of the exchange surface shown in region B in . State the name of the main blood vessel that delivers blood to the lungs. The gas exchange surface shown in is permeable to make gas exchange efficient. List two other features of gas exchange surfaces. Oxygen concentration is higher in inspired air than in expired air. State one other way the composition of inspired air differs from the composition of expired air.
0610_s21_qp_32
THEORY
2021
Paper 3, Variant 2
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Complete the sentences about the features of the human gas exchange system. Gas exchange surfaces have a surface area. The distance across the gas exchange surfaces is very . The gas exchange system has a blood supply and good with air. shows part of the gas exchange system in the lungs of a human. W X Y Z blood capillary direction of blood flow State the name of structure W in . State the letter in that shows where the concentration of: • carbon dioxide in the blood is highest • oxygen in the blood is highest State the name of the process where molecules move down a concentration gradient.
0610_s22_qp_33
THEORY
2022
Paper 3, Variant 3
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Questions Discovered
291