Chapter 10 of 15
Revision Notes
Human Health and Diseases — Revision Notes
Maharashtra Board · Class 12 · Biology
Human Health and Diseases revision notes for Maharashtra Board Class 12 Biology: 4 topics in quick points. Includes Immunity and Immune System, Antibody.
45 questions20 flashcards5 concepts
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Key Topics to Revise
1
Immunity and Immune System
- Immunity is the resistance exhibited by host towards injury caused by pathogens and their products
- Immune system distinguishes between self (body's own cells) and non-self (foreign molecules)
- Antigens are foreign substances that stimulate immune response; Antibodies are protective chemicals produced against antigens
2
Antibody Structure and Function
- Antibodies are Y-shaped glycoprotein molecules also called Immunoglobulins (Igs)
- Structure: 4 polypeptide chains - 2 heavy chains and 2 light chains held by disulfide bonds
- Variable regions form antigen-binding sites (paratopes) - provide specificity
3
Blood Groups and Compatibility
- ABO blood groups discovered by Karl Landsteiner (1900) - Nobel Prize winner
- Four blood groups: A, B, AB, O based on presence/absence of A and B antigens on RBCs
- Blood group A: Antigen A on RBCs, antibody b in plasma
4
Common Infectious Diseases
- Malaria: Caused by Plasmodium (P. vivax, P. ovale, P. malariae, P. falciparum), transmitted by female Anopheles mosquito
- Malaria symptoms: Cyclic fever, chills, sweating, headache, anaemia, hepatomegaly
- Amoebiasis: Caused by Entamoeba histolytica, transmitted through faeco-oral route
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Full NotesKey Concepts
Immunity is the body's abilityAntibodies are YABO blood groups are determined byCommunicable diseases caused by pathogens (bacteriaCancer results from uncontrolled cell division
Frequently Asked Questions
What are the important topics in Human Health and Diseases for Maharashtra Board Class 12 Biology?
Key topics in Human Health and Diseases include Immunity and Immune System, Antibody Structure and Function, Blood Groups and Compatibility, Common Infectious Diseases. Study these first, then practise questions on each for the Maharashtra Board Class 12 board exam.
How should I revise Human Health and Diseases for the Maharashtra Board Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Human Health and Diseases. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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