IGCSE Biology - Smoking
Key terms from Edexcel IGCSE Biology on the topic of Smoking
Inflammation of the mucus membranes of the bronchi. Commonly caused when cigarette smoke paralyses the cilia lining the air passages, preventing mucus being swept away from the lungs.
A lung disease caused when cigarette smoke damages alveoli causing them to become enlarged and inefficient for gas exchange. A person with this disease will suffer breathlessness.
A disease characterised by uncontrolled cell growth in the tissues of the lungs
Strongly addictive drug present in cigarettes
Toxic matter produced by burning tobacco that can collect in the lungs of smokers
Cancer causing substance or agent
A mass of cells that have mutated and divided out of control
A toxic gas present in cigarette smoke. It can enter the blood from the lungs where it combines with haemoglobin, blocking the blood's ability to carry oxygen to body cells.
A compound formed when haemoglobin combines with carbon monoxide in preference to oxygen
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