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What are the methods of cancer detection? Describe the common approach...

What are the methods of cancer detection | Class 12 Biology Chapter Human Health and Disease, Human Health and Disease NCERT Solutions

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Human Health and Disease. This page offers a step-by-step solution to the specific question from Exercise 0, Question 5: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 5:

What are the methods of cancer detection? Describe the common approaches for treatment of cancer.

Answer:

Early detection of cancer is essential. The methods of cancer detection and diagnosis are as follows:

Biopsy and histo- pathological studies of the tissues/ blood/ bone marrow.
Test for increases cell counts (in the case of leukemia blood cancer).
Techniques like radiography (use of X- rays), CT (computed tomogramphy) and MRI (Magnetic Resonance Imaging) to detect cancers of the internal organs.
Detection of cancer specific antigens.
Molecular biology techniques to detect genes in individuals with inherited susceptibility to certain cancers.

Common approaches for treatment of cancer

Surgical removal of tumor.
Irradiation of tissue to kill cancerous cells.
Immunotherapy
Immunotherapy using interferon to boost cancer cell killing.
Harmful effects of drugs like LSD, barbiturates are as follows:
Anxiety, shakiness, nausea and sweating, loss of mind control.
Reckless behaviour, vandalism and violence.
Lack of interest in personal hygiene, fluctuations in weight and appetite.
Withdrawal, isolation, depression, fatigue, aggressive behaviour.
Social adjustments problems.
Withdrawal can be severe and life threatening.
Excessive doses of drugs may lead to coma and death may occur due to respiratory failure, heart failure or cerebral hemorrhage.

Other Questions of Chapter Human Health and Disease

What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B Vaccine is produced.

Q: Draw a well-labelled diagram of an antibody molecule.

From which plant cannabiniods are obtained? Name any two cannabinoids. Which part of the body is effected by consuming these substances?

The harmful allele of sickle cell anemia has not been eliminated from human population. Such afflicted people derive some other benefit. Discuss.

Differentiate between active immunity and passive immunity.

Q: How is a cancerous cell different from a normal cell?

Q: In which way has the study of biology helped us to control infectious diseases?

Q: What measure would you take to prevent water-borne diseases?

Q: How does the transmission of each of the following diseases take place?
(a) Amoebiasis
(b) Malaria
(c) Ascariasis
(d) Pneumonia

Differentiate between benign tumor and malignant tumor.

Popular questions of class 12 Biology

Q: What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q: Why is reproduction essential for organisms? Answer

Q: Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals.

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q: What is DNA fingerprinting? Mention its application.

Q: What is oogenesis? Give a brief account of oogenesis.

Q: Describe the structure of a seminiferous tubule.

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q: With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q: Explain the Law of Dominance using a monohybrid cross.

Recently Viewed Questions of Class 12 Biology

Taking examples under each category, discuss upstream and downstream processing.

Name the first transgenic cow. Which gene was introduced in this cow?

Q: Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?

Q: Explain what is meant by biofortification.

What is the main idea behind “Joint Forest Management Concept” introduced by the Government of India?

Q: List two essential roles of ribosome during translation.

Q: If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?

Q: Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)

Which type of food would have lactic acid bacteria. Discuss their useful application.

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Human Health and Disease.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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