1. What are the four main components of a health assessment? Explain each one briefly. - The four main components are health history, physical examination, laboratory tests and diagnostic procedures. Health history is the collection of subjective data from the patient or a reliable source about their past and present health status, symptoms, risk factors, medications, allergies, etc. Physical examination is the collection of objective data from the patient using inspection, palpation, percussion and auscultation techniques. Laboratory tests are the analysis of body fluids or tissues to detect abnormalities or confirm diagnoses. Diagnostic procedures are the use of imaging or other methods to visualize or measure the structure or function of organs or systems. 2. What are the three levels of health promotion and prevention? Give an example of each one. - The three levels are primary, secondary and tertiary. Primary prevention aims to prevent disease or injury before it occurs by reducing risk factors or enhancing protective factors. An example is immunization against infectious diseases. Secondary prevention aims to detect and treat disease or injury early before it causes significant damage or complications. An example is screening for breast cancer with mammography. Tertiary prevention aims to reduce the impact of disease or injury that has already occurred by restoring function, preventing complications or improving quality of life. An example is rehabilitation after a stroke. 3. What are some common sources of error or bias in health assessment? How can you minimize them?