Question: Define health.
Answer: Health means a state of physical, mental and social well-being.
Question: Define disease.
Answer: Disease means being uncomfortable.
Question: What do you mean by symptoms of disease?
Answer: Symptoms of disease are the signs of a disease which indicates the presence of a particular disease.
Question: What are acute diseases?
Answer: Those diseases which last for very short period of time are called acute diseases. Example, headache and cold.
Question: What are chronic diseases?
Answer: The diseases which last for very long period of time are called chronic disease Example, tuberculosis and jaundice.
Question: What are pathogens?
Answer: The disease causing microbes are called pathogens. Example, bacteria, virus, fungi, worms.
Question: What are vectors?
Answer: The organisms that spread or carry pathogens from one place to another, from infected person to healthy person is called vector. Example, mosquito, housefly etc.
Question: What are infectious diseases?
Answer: Diseases which can spread from one person to another and microbes are the immediate cause for these diseases are called infectious diseases. Example, typhoid
Question: What are non-infectious diseases?
Answer: Diseases which do not spread from one person to another is called non-infectious diseases. Example, cancer.
Question: Name any one disease caused due to genetic abnormality.
Question: Name two diseases caused by protozoa.
Answer: Malaria and amoebiasis.
Question: Name two diseases caused due to bacteria.
Answer: Tuberculosis, typhoid.
Question: Name two disease caused due to virus.
Answer: Polio, chickenpox.
Question: Name two disease caused by fungi.
Answer: Scabies and skin infection.
Question: What are antibiotics?
Answer: Antibiotics are drugs that block the biochemical pathways important for bacteria. These are used to cure diseases caused due to bacteria.
Question: Give the full form of AIDS.
Answer: AIDS – Acquired Immunodeficiency Syndrome (Syndrome means collection of symptoms).
Question: Name the pathogen that causes sleeping sickness.
Answer: The protozoan → Trypanosoma.
Question: Name the organism that causes kala-azar.
Question: Name two air-borne diseases.
Answer: Common cold, cough, tuberculosis.
Question: Name two diseases that are organ specific.
- Jaundice – liver
- Tuberculosis – lungs
Question: Which virus causes AIDS?
Answer: HIV virus causes AIDS
HIV – Human Immuno Deficiency Virus.
Question: State any two conditions for good health
Answer: Two conditions essential for good health are:
- State of physical, mental and social well-being.
- Better surroundings or environment.
Question: State any two conditions essential for being free of disease.
Answer: The two conditions essential for being free of disease are:
- Personal and domestic hygiene
- Clean environment and surroundings
Question: Are the answers to the above questions necessarily the same or different? Why?
Answer: The answer to the above questions are different because a person may be free of disease but his mental, social or economical health may not be good.