10th Class Biology Chapter 2 TestHUMAN RESPIRATORY SYSTEM

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Nicotine and other chemicals in vapes increase which cardiovascular factors?

   1. Heart rate and blood pressure

   2. Blood volume only

   3. Red blood cells

   4. Oxygen levels

2. What type of cartilage protects the walls of the trachea from collapsing?

   1. Plate-like cartilages

   2. C-shaped cartilages

   3. O-shaped cartilages

   4. Linear cartilages

3. In Pakistan, lung cancer accounts for about what percentage of all new cancer cases annually?

   1. 12.4%

   2. 5.1%

   3. 1.5%

   4. 22%

4. What happens to the ribcage during exhalation?

   1. Upward and outward

   2. Upward and inward

   3. Downward and outward

   4. Inwards and downwards

5. Which type of medicines are used to dilate the bronchioles during an asthma attack?

   1. Antibiotics

   2. Antifungals

   3. Bronchodilators

   4. Antivirals

6. At the floor of pharynx there is an opening called:

   1. Trachea

   2. Glottis

   3. Epiglottis

   4. Vocal cords

7. Amount of carbon dioxide in expired air is:

   1. 21%

   2. 4%

   3. 16%

   4. 0.04%

8. Air enters the nasal cavity through which parts?

   1. Pharynx

   2. Larynx

   3. Nostrils

   4. Trachea

9. Which path does air take immediately after passing through the larynx?

   1. Pharynx

   2. Bronchi

   3. Trachea

   4. Alveoli

10. What is the inhalation of smoke from another person's smoking called?

    1. Active smoking

    2. Passive smoking

    3. Thermal smoking

    4. Radiation smoking