Diseases Cause and Control
ICSE · Class 9 · Biology
Flashcards for Diseases Cause and Control — ICSE Class 9 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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Get startedWhat is a disease?
Answer
Disease is a departure from normal health through structural or functional disorder of the body. It means the normal working of the body is disturbed.
How are diseases classified by extent of occurrence?
Answer
Diseases are classified as endemic, epidemic, pandemic, and sporadic. Endemic stays in a certain area, epidemic spreads rapidly in many places at the same time, pandemic is found worldwide, and sporad…
What is an endemic disease?
Answer
An endemic disease is found in a certain area only and affects a fewer number of people. Goitre in sub-Himalayan regions is an example.
What is an epidemic disease?
Answer
An epidemic disease breaks out and spreads from place to place, affecting large numbers of people at the same time. Plague in India in 1994 is an example.
What is a pandemic disease?
Answer
A pandemic disease is widely distributed worldwide. AIDS is an example.
What is a sporadic disease?
Answer
A sporadic disease occurs as scattered individual cases. Malaria and cholera are examples.
What are communicable diseases?
Answer
Communicable or infectious diseases are caused by germs. The germs enter a healthy person and spread the disease from one person to another by some mode of transmission.
What are non-communicable diseases?
Answer
Non-communicable or non-infectious diseases do not spread from one person to another. They are caused by poor functioning of the body and have no germ involved. Examples include diabetes, colour blind…
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