The search for better health Discuss the difficulties of defining the terms 'health' and 'diseases': Health is hard to define because it incorporates many things and some can be very subjective. Such as, biological, psychological and social well-being. Disease is similarly difficult to define because it is a state of impairment functioning or poor health. It depends on an individual's normal level of functioning and on what they expect their quality of life to be. …showed first 75 words of 10592 total…

…showed last 75 words of 10592 total…the brain to coordinate the behaviour. Behaviour may be a simple reaction, such as blinking the eyes in response to an object coming too close. Or it may be a complex activity such as building a nest, catching prey or learning to perform a task. It is important to interpret signals by the brain correctly for the coordination of behaviour because it makes sure that the correct response is does...see p.41 for better wording...