4.5 Breathing And Gas Exchange (GCSE Biology)

The following is a GCSE Biology test covering '4.5 Breathing And Gas Exchange'

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How are oxygen molecules transported in the blood?

Which gas is essential for human respiration?

What is the main job of the ventilation system in humans?

How is carbon dioxide mainly transported in the blood?

What happens to the diaphragm when you breathe in?

Each alveolus is shaped to:

What do intercostal muscles do during inhalation?

Which muscle separates the thorax from the abdomen?

Which of the following statements is correct about air breathed out?

The concentration gradient between alveoli and blood is maintained by:

What process allows oxygen to pass from the alveoli into the bloodstream?

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