ROUTERA


Chapter 8 Human Health and Disease

Class 12th Biology Chapter Case Study


Case Study 1: Chronic Diseases and Lifestyle Changes

Mr. Sharma, a 50-year-old man, had been leading a sedentary lifestyle for the past several years, consuming a high-fat diet, and smoking regularly. Recently, he was diagnosed with hypertension and type 2 diabetes. His doctor advised him to make lifestyle changes, such as adopting a balanced diet, engaging in physical exercise, and reducing stress. Over time, Mr. Sharma noticed improvement in his health as his blood pressure and blood sugar levels became more manageable. These lifestyle changes helped reduce the need for medication.

Questions:

  1. Which of the following is a modifiable risk factor for hypertension and type 2 diabetes in Mr. Sharma's case?

    • A) Age
    • B) Gender
    • C) Smoking
    • D) Family history

    Answer: C) Smoking

  2. Which of the following is NOT a recommended lifestyle change to manage hypertension and diabetes?

    • A) Regular physical exercise
    • B) High-fat diet
    • C) Stress management
    • D) Reduced salt intake

    Answer: B) High-fat diet

  3. Type 2 diabetes is primarily caused by:

    • A) Insulin deficiency
    • B) Insulin resistance
    • C) Excessive sugar intake
    • D) Genetic mutations

    Answer: B) Insulin resistance

  4. Which of the following is a common consequence of untreated hypertension?

    • A) Heart attack
    • B) Asthma
    • C) Tuberculosis
    • D) Cancer

    Answer: A) Heart attack


Case Study 2: Infectious Diseases and Vaccination

In a rural village, an outbreak of measles occurred, affecting a significant number of children. The local health authorities immediately conducted a vaccination campaign to prevent further spread of the disease. Measles is a highly contagious viral disease that primarily affects children under the age of five. The vaccination program was successful, and new cases of measles declined significantly within weeks.

Questions:

  1. What is the causative agent of measles?

    • A) Bacteria
    • B) Virus
    • C) Fungi
    • D) Protozoa

    Answer: B) Virus

  2. The primary method of preventing the spread of measles is:

    • A) Antibiotics
    • B) Vaccination
    • C) Proper sanitation
    • D) Antiviral drugs

    Answer: B) Vaccination

  3. Measles primarily affects which age group?

    • A) Elderly individuals
    • B) Adults
    • C) Children under five years
    • D) Pregnant women

    Answer: C) Children under five years

  4. The measles vaccine is commonly administered as part of which combination vaccine?

    • A) MMR (Measles, Mumps, and Rubella)
    • B) DPT (Diphtheria, Pertussis, Tetanus)
    • C) BCG (Bacillus Calmette–Guérin)
    • D) OPV (Oral Polio Vaccine)

    Answer: A) MMR (Measles, Mumps, and Rubella)


Case Study 3: Autoimmune Diseases

Ms. Kapoor, a 35-year-old woman, began experiencing joint pain, fatigue, and a butterfly-shaped rash on her face. After a series of tests, she was diagnosed with Systemic Lupus Erythematosus (SLE), a chronic autoimmune disease. In SLE, the immune system mistakenly attacks the body’s own tissues, causing inflammation and damage to various organs. Treatment for SLE involves immunosuppressive drugs and lifestyle modifications.

Questions:

  1. Systemic Lupus Erythematosus (SLE) is a type of:

    • A) Infectious disease
    • B) Autoimmune disease
    • C) Genetic disorder
    • D) Cancer

    Answer: B) Autoimmune disease

  2. The immune system of an individual with SLE mistakenly attacks:

    • A) Pathogens
    • B) Body’s own tissues
    • C) Red blood cells
    • D) Healthy bacteria

    Answer: B) Body’s own tissues

  3. The characteristic butterfly-shaped rash on the face of SLE patients is due to:

    • A) Allergic reaction
    • B) Blood clotting disorder
    • C) Inflammation due to the immune system attack
    • D) Bacterial infection

    Answer: C) Inflammation due to the immune system attack

  4. Which of the following is the primary treatment for SLE?

    • A) Antibiotics
    • B) Antiviral medication
    • C) Immunosuppressive drugs
    • D) Chemotherapy

    Answer: C) Immunosuppressive drugs


Case Study 4: Cancer and Its Diagnosis

Mr. Rao, a 60-year-old man, had been experiencing persistent cough, chest pain, and difficulty breathing. After a series of medical tests, including a biopsy, he was diagnosed with lung cancer. The cancer cells were found to have spread to nearby tissues. He underwent chemotherapy and radiation therapy as part of his treatment plan. His doctors emphasized the importance of early detection in improving the chances of successful treatment.

Questions:

  1. Which of the following is the most common risk factor for lung cancer?

    • A) Smoking
    • B) Excessive exercise
    • C) Genetic mutations
    • D) High-fat diet

    Answer: A) Smoking

  2. The process of removing tissue to examine for cancer cells is known as:

    • A) MRI scan
    • B) Biopsy
    • C) X-ray
    • D) Endoscopy

    Answer: B) Biopsy

  3. Lung cancer is classified as:

    • A) A viral infection
    • B) A fungal infection
    • C) A genetic disorder
    • D) A type of cancer

    Answer: D) A type of cancer

  4. The main goal of chemotherapy in cancer treatment is to:

    • A) Strengthen the immune system
    • B) Remove all cancer cells surgically
    • C) Kill or slow the growth of cancer cells
    • D) Increase oxygen delivery to tissues

    Answer: C) Kill or slow the growth of cancer cells


Case Study 5: Cardiovascular Diseases

Mr. Patel, a 45-year-old man, had been experiencing frequent chest pain and shortness of breath, especially after physical exertion. Upon visiting his doctor, he was diagnosed with coronary artery disease (CAD), a condition where the blood vessels supplying the heart become narrowed or blocked due to the buildup of cholesterol and other substances. His doctor recommended a combination of lifestyle changes, medication, and, in some cases, surgical interventions like angioplasty or bypass surgery.

Questions:

  1. Coronary artery disease (CAD) primarily results from:

    • A) Genetic mutations
    • B) Infection of blood vessels
    • C) Buildup of cholesterol and plaque in the arteries
    • D) Inflammation of the heart muscle

    Answer: C) Buildup of cholesterol and plaque in the arteries

  2. A common treatment for CAD that involves using a balloon to widen a blocked artery is known as:

    • A) Angioplasty
    • B) Bypass surgery
    • C) Pacemaker implantation
    • D) Coronary artery stenting

    Answer: A) Angioplasty

  3. A major risk factor for coronary artery disease (CAD) is:

    • A) Smoking
    • B) High physical activity
    • C) High-fiber diet
    • D) Regular sleep

    Answer: A) Smoking

  4. Bypass surgery in CAD involves:

    • A) Removal of cholesterol from arteries
    • B) Replacing blocked arteries with grafts
    • C) Implanting a pacemaker
    • D) Inserting a stent into the artery

    Answer: B) Replacing blocked arteries with grafts