NCERT Exemplar for Class 12 Biology Chapter-8 (Book Solutions)


NCERT Exemplar for Class 12 Biology - Human Health and Disease - Free PDF Download

Free PDF download of NCERT Exemplar for Class 12 Biology Chapter 8 - Human Health and Disease solved by expert Biology teachers on as per NCERT (CBSE) Book guidelines. All Chapter 8 - Human Health and Disease exercise questions with solutions to help you to revise the complete syllabus and score more marks in your examinations.

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NCERT Exemplar for Class 12 Biology Chapter-8 part-1

NCERT Solutions by Vedantu for Class 12 Biology Chapter 8

NCERT Solutions by Vedantu for Class 12 Biology Chapter 8 Human Health and Diseases presents solutions for all of the textbook questions appearing in the Class 12 textbook. The NCERT Solutions for Class 12 Biology is available in a PDF format so that students can download and seek advice from these answers at their comfort and study through them. These solutions are updated on a regular basis for you with CBSE Syllabus 2021-22 and also they can be used to put together good notes that can be used throughout the revisions.

FAQs (Frequently Asked Questions)

1. Is the topic Metastasis important in the Chapter Human Health and disease? 

Metastasis alludes to the spread of malignant growth cells from the site of beginning to different spaces of the body through the lymph or the circulation system. The metastatic cells develop quickly and harm the ordinary tissues encompassing the dangerous cells. They travel to far-off regions through the blood and structure another cancer. The therapy of metastasis relies on the area, and kind of disease. Chemotherapy, immunotherapy, medical procedure, radiation treatment are the therapies that accommodated metastasis. There are a few therapies that are utilized to facilitate the symptoms of the disease. This topic carries a good weightage when it comes to preparing for exams and hence students should refer to the topic.

2. Why are the NCERT Solutions for Class 12 Biology Chapter 8 important for assessments?

Class 12 is taken into consideration to be one of the vital steps in students’ life. For this cause, the faculty at Vedantu have designed the question bank with answers after accomplishing big research on each concept. The answers comprise specified and stepwise motives to help students score well in the term – II tests. PDF format of answers is available on Vedantu which can be downloaded and utilized by the scholars primarily based on their requirements.

3. What are the harmful effects caused by alcohol/drug abuse according to the NCERT Class 12th biology textbook? 

Destructive impacts of liquor: 

An individual – adversely affects the body. At the point when overabundance liquor is devoured, it harms the sensory system and the liver, which is an indispensable organ. This prompts different side effects like weariness, misery, weight reduction, hostility, loss of hunger. In outrageous cases, cardiovascular breakdown prompting trance-like state and demise is additionally noticed. 

On family – overabundance liquor utilization by any relative can have destructing consequences for the relatives as it might prompt abusive behavior at home, boisterous attack, aggravation, uncertainty, and so on 

On society – rash conduct, blurring social web, viciousness, absence of interest in friendly exercises. 

Risky impacts of medications: 

On an individual – the impact of medications on one's body is serious, all the more so on the focal sensory system. It can prompt the failing of various organs of the body like the liver, kidney, and so on in such people, HIV spreads quickly as they share utilized needles while they infuse drugs into the body. Drug addicts face both present moment and long haul impacts, some of which are emotional episodes, forcefulness, despondency, and so forth 

On family and society – A medication fiend makes issues inside the family and the general public. At the point when an individual is reliant upon drugs, he/she becomes disturbed, baffled, and hostile to society.

4. How does the mechanism by which the AIDS virus causes deficiency of the immune system work according to the 12th Class NCERT Biology textbook? 

AIDS is a viral sickness because of the HIV virus. It is taken into consideration to be one of the riskiest diseases and not using a treatment till now. HIV influences the immune device of the frame and makes it unable to carry out its ordinary functions. The mechanism by way of which the HIV virus reasons deficiency of the immune machine is as follows:

1. After entering into the body, HIV binds itself to the receptors present on helper T-cells and introduces its RNA and opposite transcriptase enzyme into those cells.

2. After this, by utilizing the host cells, HIV produces a copy of DNA itself through opposite transcription.

3. This reproduction of DNA gets integrated into the genome of the host cells. This is referred to as the provirus, which directs the viral genome to produce new virus debris.

4. The subsequent formation and release of viral debris damage the host cell. As a result, the wide variety of T cells decreases.

5. AIDS takes place whilst the count number of helper T-cells falls very tons and the frame is unable to fight against diseases.

5. Important Features  of NCERT Solutions Class 12 Biology Chapter 8 – Human Health and Diseases? 

NCERT Solutions fill in as a genuinely good help. It contains the usage of useful terms and straightforward language. Outlines are simple and easy to understand 

Curated by the well-informed authorities, henceforth totally dependable. Utilization of applicable models. Utilization of pointers in any place is fundamental. When a student refers to these from the beginning, she starts to understand the concepts which also help her build up a base for future studies. NCERTs are also reviewed regularly, thus providing a newer and a more advanced approach towards issues at hand.

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