Golden Key Points – Chapter 7 Human Health and Disease

Golden Key Points

Immune System:

• The immune system defends the body against pathogens.
• It consists of lymphoid organs, tissues, cells, and soluble molecules like antibodies.
• Acquired immunity involves memory and specific responses to pathogens.
• The immune system plays roles in allergies, auto-immune diseases, and organ transplantation.

2. Vaccination and Immunization:

• Vaccination introduces antigenic proteins or weakened pathogens to stimulate immune responses.
• Vaccines generate memory B and T cells for rapid pathogen recognition.
• Passive immunization involves the direct administration of antibodies for immediate protection.

3. AIDS:

• Acquired Immuno Deficiency Syndrome (AIDS) is caused by the Human Immunodeficiency Virus (HIV).
• HIV is transmitted through sexual contact, blood transfusions, sharing needles, or from infected mother to child.
• Prevention involves safe practices, education, and awareness campaigns.

4. Cancer:

• Cancer results from uncontrolled cell growth due to breakdown in regulatory mechanisms.
• Tumors may be benign (non-spreading) or malignant (spreading).
• Causes include physical, chemical, and biological agents, as well as genetic factors.

5. Drugs and Alcohol Abuse:

• Drug and alcohol abuse can stem from curiosity, peer pressure, or stress.
• Addiction and dependence can develop due to repeated use.
• Abuse can lead to reckless behavior, health problems, and social issues.

6. Adolescence and Drug/Alcohol Abuse:

• Adolescence is a vulnerable phase for mental and psychological development.
• Curiosity, peer pressure, and stress can lead to drug and alcohol abuse among adolescents.
• Prevention strategies involve education, counselling, and seeking help from parents, peers, and professionals.

7. Addiction and Dependence:

• Addiction is a psychological attachment to the effects of drugs or alcohol.
• Dependence leads to withdrawal symptoms when use is discontinued.
• Social norms may be ignored to sustain drug or alcohol dependence.

8. Effects of Drug/Alcohol Abuse:

• Adverse effects include reckless behavior, health complications, and strained relationships.
• Intravenous drug use can lead to serious infections like AIDS and Hepatitis B.
• Long-term effects include chronic health issues, addiction, and societal consequences.

9. Prevention and Control:

• Prevention strategies include avoiding peer pressure, education, seeking help, and recognizing danger signs.
• Professional and medical assistance is crucial for overcoming addiction and leading a healthy life.