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Health is the state of physical, mental and social well-being. It is not just being free from disease. Communicable diseases can be transferred from one person to another, whilst non-communicable diseases cannot.

Â鶹ԼÅÄostasis is the maintenance of a constant internal environment. Regulating body temperature, blood glucose level and water content are all examples of homeostasis.

Hormones are secreted by glands in the endocrine system. They are involved in puberty, regulating the menstrual cycle, contraception and fertility treatments.

There are many different types of radiation. Some are dangerous and some can be useful, it is important to understand the risks posed by all types of radiation.

Some diseases can be treated with antibiotics, but not all can be cured. Vaccinations allow protection against specific diseases, but the level of protection depends on the amount of people vaccinated.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.