Health and disease class 12. Important Questions Human Health and Diseases Class 12 Biology 2022-11-05
Health and disease class 12
Health is a state of physical, mental, and social well-being in which an individual is able to lead a fulfilling and productive life. It is not just the absence of disease or infirmity, but rather a positive state of overall functioning. Good health is essential for an individual to lead a happy and fulfilling life.
On the other hand, disease is a condition that disrupts an individual's normal functioning and causes a negative impact on their health. It can be caused by a variety of factors, including genetics, environmental factors, and lifestyle choices. Some diseases are acute, meaning they have a sudden onset and are typically short-lived. Others are chronic, meaning they are long-term conditions that require ongoing management.
There are many ways to maintain good health and prevent the onset of disease. These include eating a healthy and balanced diet, getting regular exercise, getting enough sleep, and avoiding risky behaviors such as smoking and excessive alcohol consumption. Regular check-ups with a healthcare provider can also help to identify potential health issues early on and allow for timely treatment.
There are many different types of diseases, ranging from infectious diseases such as the flu or pneumonia, to chronic conditions such as diabetes or heart disease. Some diseases are caused by pathogens, which are microorganisms such as bacteria or viruses that invade the body and cause illness. Others are caused by non-infectious factors such as genetics, lifestyle choices, and environmental factors.
Treatment for diseases can vary widely depending on the specific condition. Some diseases can be cured with a course of medication, while others may require ongoing management through lifestyle changes or ongoing treatment. In some cases, diseases may be terminal, meaning they cannot be cured and will eventually result in death.
In conclusion, health is a crucial aspect of an individual's overall well-being, and maintaining good health can help to prevent the onset of disease. There are many factors that can contribute to good health, including a healthy lifestyle and regular check-ups with a healthcare provider. While diseases are a natural part of life, there are many ways to manage and treat them, allowing individuals to lead fulfilling and productive lives.
NCERT Book Class 12 Biology Chapter 8 Human Health and Disease
AIDS or Acquired Immuno Deficiency Syndrome was first reported in 1981 in USA. Cancerous cells divide actively and compete for nutrients with the normal tissue. After a while one of the boys from the group started screaming, behaving abnormally and sweatingprofusely. Sometimes, this system of immune response fails to function properly. Non-communicable diseases are non-infectious ones that remain confined to the diseased person only. The entry of pathogens is restricted with this immunity with the help of certain barriers. List any two emergent circumstances, when a medical doctor would recommend injection of a preformed antibody into the body of a patient and why? Control and elimination of vectors.
Human Health and Disease Class 12 Notes CBSE Biology Chapter 8 [PDF]
How does the drug affect the human body? It stimulates the release of adrenaline and nor-adrenaline which cause high blood pressure and increased heartbeat. The main lymphoid organ is the bone marrow where all blood cells including lymphocytes are produced. Innate immunity consists of four types of barriers. All India 2010C Answer: Carcinogens can transform normal cell into cancerous cells. Diagnostic test for AIDS is ELISA enzyme-linked Immuno-sorbent assay.
Human Health and Diseases Questions Class 12 Biology
Give reasons is support of your answer. How is a cancer cell different from normal cell? Infection of the nose and respiratory tract. Transmission: i By ingesting cysts with food and water. Protection against vectors 5. The surrounding cell inhibits uncontrolled growthand division of a cell. Usually presence of malarial parasite in humans is identified by pathologists by this stage.
Human Health And Diseases Class 12
Vitamins and Minerals Deficiency Diseases Vitamin-A Retinol Night blindness, Xerophthalmia, chronic diarrhoea, etc. Seeking professional and medical help. Immunity is of two types: i Innate immunity ii Acquired immunity. Cleaning and disinfection of water reservoirs , pools etc. Name the stage of Plasmodium that gains entryinto the human when bitten by an infected femaleAnopheles.
Human Health and Disease class 12 Notes Biology
During a practice session you find some vials with labels of certain cannabinoids. Infectious Diseases —Those diseases that can be transferred easily from one person to another are called infectious diseases. They stimulate B-cells to produce antibodies. As a mother, she protectsÂ her child from getting sick and encourage her kids to be strong and fit by eating healthier and hygiene food. The majority of the cancers are treated by a combination of all the above methods. Delhi 2016C Types of barrier Example of the barrier Function i A B Prevent microbial growth ii C Polymorpho nuclear leucocytes D iii Cytokine E F Answer: i A — Physiological barriers B — Lysozyme in saliva ii C — Cellular barriers D — Fhagocytose and destroy microbes iii E — Interferons F — Prevention of viral infections Question 64.
Human Health and Disease for Class 12 Chapter 8 Biology Notes
Secondary lymhoid organs — Spleen, lymph nodes, tonsils. Explain, how does it impart immunity to the child against the disease. Dust in the surroundings rises the chances of allergy in children. Vaccination and immunisation The principle is based on the property of memory of immune system. Diseases Caused by Fungi Ringworm Microsporum, Trichophyton, Epidermophyton. The revision notes are prepared based on the CBSE guidelines.
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This causes enormous swelling of legs, scrotal sacs, breasts, etc. Answer: i For concerous cells Refer to Answer No. Bone marrow is the main lymphatic organ where all blood cells, as well as lymphocytes, are produced. It is prominent in children but keeps on reducing with age, by puberty it becomes very small in size. The protective chemicals proteins produced by the body in response to antigens are called antibodies.
Human Health and Diseases Class 12 Biology Notes
It is affected by many reasons. Proper disposal of wastes and excreta. Delhi 2014C Or Name the plant source of ganja. Why is a person with cuts and bruises following an accident administered tetanus antitoxin?. When the body cells lose this property and show an abnormal growth with a breakdown of the regulatory mechanism in the cells, then it leads to mass of continuously growing cells.