BRAINCAKECardiovascular Disease
Smoking, high blood pressure, high blood cholesterol and a poor diet increase the risk of cardiovascular disease.
Smoking
Carbon monoxide has a higher affinity for haemoglobin than oxygen and combines irreversibly with haemoglobin. This reduces the oxygen-carrying capacity of the blood and raises the blood pressure.
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Key terms in this lesson
- haemoglobin
- A globular, quaternary protein in red blood cells, made of four polypeptide chains each with a haem group, that binds and transports oxygen.
More in Mass Transport in Animals
- Features of a Transport System
- Circulatory Systems
- Structure of the Human Heart
- Coronary Arteries
- The Cardiac Cycle
- Valves and Control of Blood Flow
- Pressure and Volume Changes
- Cardiac Output
All 27 lessons in Mass Transport in Animals · All AQA AS-level Biology topics