Questions covering human health, diseases, and related biological concepts for exam preparation. Includes causes, symptoms, and prevention of common illnesses.
Histamine is released by mast cells during allergic reactions, leading to inflammation and other symptoms.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Tuberculosis primarily affects the lungs, causing symptoms such as persistent cough and difficulty in breathing.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Plasma cells, derived from B-lymphocytes, are responsible for producing antibodies.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
The lymphatic system does not have a pump like the heart; lymph flows through contraction of muscles and one-way valves.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Memory B-cells are responsible for immunological memory, allowing a faster and stronger response upon second exposure to the same antigen.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Cannabinoids are derived from the Cannabis sativa plant and affect the central nervous system.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Inflammation is a key part of the immune response, helping to eliminate pathogens and repair tissue damage.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
The lymphatic system is not responsible for oxygen transport; its primary functions include immune defense and fluid balance.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Memory B-cells retain information about pathogens and provide long-term immunity upon re-exposure.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
The BCG vaccine is a live-attenuated vaccine used for immunization against tuberculosis.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Histamine does not reduce inflammation; instead, it promotes inflammation by causing blood vessels to dilate.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
Heroin is an opioid drug derived from morphine and acts as a depressant on the central nervous system.
Ref: NCERT Class 12 Biology Chapter 7: Human Health and Disease Drugs and Alcohol Abuse - Opioids Cannabinoids Cocaine Adolescence
