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Video Short Tricks Human Health & Diseases Video Lecture - Biology Class
FAQs on Video: Short Tricks: Human Health & Diseases
| 1. What are the common infectious diseases that affect humans? |  |
Ans. Common infectious diseases that affect humans include influenza, tuberculosis, HIV/AIDS, hepatitis, and malaria. These diseases are caused by various pathogens such as viruses, bacteria, and parasites, and they can spread through different routes including direct contact, air, and contaminated water or food.
| 2. How do vaccines work to prevent diseases? | |
Ans. Vaccines work by stimulating the immune system to produce an immune response against specific pathogens. They typically contain weakened or inactivated forms of the virus or bacteria, or pieces of the pathogen such as proteins. By introducing these components, vaccines prepare the immune system to recognise and combat the actual disease if exposed in the future.
| 3. What is the significance of the 'Hygiene Hypothesis' in understanding allergies? | |
Ans. The 'Hygiene Hypothesis' suggests that a lack of early childhood exposure to infectious agents, microorganisms, and parasites increases susceptibility to allergic diseases. According to this hypothesis, the immune system may not develop properly without these exposures, leading to an increased risk of allergies and autoimmune conditions.
| 4. What role do antibiotics play in treating bacterial infections? | |
Ans. Antibiotics are medications that specifically target and kill bacteria or inhibit their growth. They are effective against bacterial infections but do not work against viral infections. It is important to use antibiotics judiciously to prevent the development of antibiotic-resistant bacteria, a growing concern in public health.
| 5. How does the immune system protect the body from diseases? | |
Ans. The immune system protects the body from diseases through a complex network of cells, tissues, and organs that work together to identify and eliminate pathogens. Key components include white blood cells, antibodies, and the lymphatic system. The immune response involves recognising foreign invaders, activating immune cells, and producing antibodies that specifically target the pathogens for destruction.
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Apr 15, 2026 Last updated
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