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Human Health & Diseases: Cancer Video Lecture | Biology for Grade 12

FAQs on Human Health & Diseases: Cancer Video Lecture - Biology for Grade 12

1. What is cancer?

Ans. Cancer is a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body. These cells can invade and destroy surrounding healthy tissues, and may also spread to other parts of the body through the bloodstream or lymphatic system.

2. How does cancer develop in the body?

Ans. Cancer develops when there are errors or mutations in the DNA of cells. These mutations can be caused by various factors such as exposure to carcinogens (like tobacco smoke or UV radiation), genetic predisposition, or certain infections. The mutations disrupt the normal control mechanisms of cell growth and division, leading to the uncontrolled proliferation of abnormal cells.

3. What are the risk factors for developing cancer?

Ans. There are several risk factors associated with an increased likelihood of developing cancer. Some common risk factors include tobacco use, exposure to harmful chemicals or radiation, certain infections (such as human papillomavirus or hepatitis B and C), genetic factors, age, unhealthy diet, lack of physical activity, obesity, and excessive alcohol consumption.

4. Can cancer be prevented?

Ans. While it is not always possible to prevent cancer, certain lifestyle modifications can help reduce the risk. This includes avoiding tobacco and excessive alcohol consumption, maintaining a healthy weight, adopting a balanced diet rich in fruits and vegetables, engaging in regular physical activity, protecting oneself from harmful UV radiation, getting vaccinated against cancer-causing infections, and undergoing regular screenings for early detection.

5. What are the treatment options for cancer?

Ans. The treatment options for cancer depend on various factors such as the type and stage of cancer, as well as the overall health of the individual. Common treatment modalities include surgery to remove the tumor, radiation therapy to destroy cancer cells, chemotherapy to kill cancer cells using drugs, targeted therapy to target specific molecules involved in cancer growth, immunotherapy to enhance the body's immune response against cancer, and hormone therapy to block certain hormones that may stimulate cancer growth. Treatment plans are often tailored to individual cases and may involve a combination of these approaches.

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Oct 18, 2025 Last updated

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