cancer

• What are the two types of tumors mentioned in the study material?

  Benign and malignant tumors
• What is a benign tumor?

  A benign tumor is a growth of abnormal cells that is contained within a membrane and does not invade other parts of the body.
• How do malignant tumors differ from benign tumors?

  Malignant tumors invade neighboring tissues and can spread through the bloodstream.
• What happens to malignant tumor cells once they enter the bloodstream?

  They spread to different parts of the body and form new tumors called secondary tumors.
• What are secondary tumors?

  Secondary tumors are new tumors formed when malignant cells spread to different parts of the body.
• What are some genetic risk factors for developing cancer?

  Certain types of breast cancer, prostate cancer, and cancer of the large intestine.
• How is lung cancer linked to lifestyle choices?

  Lung cancer is linked to smoking.
• What environmental substance is mentioned as a risk factor for lung cancer?

  Radon, a radioactive gas.
• How does radon increase the risk of developing lung cancer?

  Radon releases ionizing radiation, which damages DNA in cells.
• What can uncontrolled cell division lead to?

  Uncontrolled cell division can lead to cancer.
• What are the risk factors for developing cancer?

  • Genetic factors (e.g., breast cancer, prostate cancer)
  • Lifestyle factors (e.g., smoking, sun exposure)
  • Environmental factors (e.g., radon exposure)
• What is the key fact about mitosis mentioned in the study material?

  Mitosis is extremely tightly controlled by genes and the nucleus.
• What is the role of genes in cell division by mitosis?

  Genes tell cells when to divide and when to stop dividing.
• What can changes in genes lead to in terms of cell division?

  Changes in genes can lead to uncontrolled growth and mitosis, producing tumors.
• What is the process of cell division that was previously discussed in the video?

  Cell division by mitosis.
• Why is mitosis important in the body?

  Mitosis is important for growth and repair after injuries.
• How do benign tumors affect the body compared to malignant tumors?

  Benign tumors do not invade other parts of the body, while malignant tumors do.