NEET Biology Health and Diseases Notes

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Study Material for NEET Biology Health and Diseases

NEET Biology students should refer to the following Pdf for Health and Diseases in NEET. These notes and test paper with questions and answers for NEET Biology will be very useful for exams and help you to score good marks

NEET Biology Health and Diseases

 

World health day – 7th April
Health : A state of complete physical, social and mental well being.
Disease : Disease, means not at ease, or health disorder. The health is affected by
(i) Inheritance,
(ii) Infection, and
(iii) Life style; the latter includes intake, habits and exercises etc.
 
Diseases can be classified in 3- different ways-
 
A. Non-ccommmmuniiccaabllee diiseeaasees aand Commmuniicaable diiseeases (Followweed in this book)
B. Congenital diseases and acquired diseases
C. Heritable and non-heritable diseases
 
I. NON- COMMUNICABLE DISEASES
 
1. Deficiency disorders – Kwashiorkar, Marasmus, Beri - Beri, Scurvy, Nyctalopia, Myxoedema, Diabetes etc.
2. Allergic diseases – Asthma, Hay-fever, Urticaria etc. (see Immunity part in this chapter)
3. Autoimmunity diseases – Hashimoto’s disease, Rheumatic heart disease, Myasthenia gravis etc. (see Immunity)
4. Hereditary diseases – PKU, ALK, Haemophilia, Sickle cell anemia, Huntington’s chorea, Colourblindness.
5. Degenerative or Organic diseases – Arthritis, Coronary thrombosis, Arteriosclerosis, Respiratory diseases, Heart disorders (already discussed with concerned systems) and cancer (dealt separately) etc.
6. Injury diseases – Sprain, Fracture and Burn etc.
7. Other diseases – Occupational diseases, Leucoderma, Obesity, and diseases due to hyper secretion of hormones, Addictions, Mental disorders.
 
II. COMMUNICABLE DISEASES
 
These diseases are caused by pathogens and can be transmitted from one organism to another, and are, therefore, also called as infectious diseases.
A particular organism is pathogen or not, can be established on the conditions laid down by Robert Koch (1876)- a German microbiologist, who worked on Anthrax disease in a sheep.
These conditions are called Koch’s postulates :
1. A diseased animal should regularly have that microorganism
2. The organism could be isolated and cultured on artifi cial or nutrient medium
3. By inoculation of that culture the same disease should appear in a healthy animal
4. The same microorganism should be recoverable from the body of inoculated animal or person
Koch’s postulates are, however, not applicable to viral diseases as the viruses can not be cultured on artifi cial media. The bacteria of the disease Leprosy can also not be cultured on artifi cial medium, so this bacteria also does not follow Koch’s postulates.
 
• Important terms or points about communicable diseases :
 
• Etiology – Study of causes of diseases
• Epidemics – Out break of disease in a major portion of a population (Mahamari)
• Epidemology – Study of mode of transmission of diseases
• John Snow – Father of epidemology, and studied epidemic of Asiatic cholera in London
• L. Pasteur and Robert Koch – proposed ‘Germ theory of diseases’.
• L. Pasteur – Developed vaccine against Rabies
• Robert Koch – Koch’s postulates (Described above)
 
 
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NEET NEET Biology Health and Diseases Study Material

We hope students liked the above Study Material for Health and Diseases designed as per the latest syllabus for NEET Biology released by NEET. Students of NEET should download the Study Material in Pdf format, read the notes and related questions and solutions given in above NEET Biology Study Material on daily basis. All latest Study Material have been developed for Biology by referring to the most important and regularly asked topics which the students should learn and practice to get better score in school tests and examinations. Expert teachers of studiestoday have referred to NCERT book for NEET Biology to develop the Biology NEET Study Material. After solving the questions given in the Study Material which have been developed as per latest course books also refer to the NCERT solutions for NEET Biology designed by our teachers. Also download NEET Biology Sample Papers given on studiestoday. After solving these you should also refer to NEET Biology MCQ Test for the same chapter.

 

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