2nd Year Biology Chapter 3 Test03: Respiratory System of Man

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

1. Which of the following is the respiratory surface in human respiratory system?
   1. larynx
   2. trachea
   3. bronchi
   4. alveoli
2. The respiration process at the cellular level is also called:
   1. External respiration
   2. Inhalation
   3. Internal respiration
   4. Exhalation
3. About 23% of carbon dioxide is carried as:
   1. Carboxyhaemoglobin
   2. Carbaminohaemoglobin
   3. Bicarbonate ions
   4. Dissolved gas
4. External respiration mainly involves:
   1. Diffusion of food
   2. Exchange of water
   3. Inhaling O2 and exhaling CO2
   4. Breakdown of glucose
5. The upper respiratory tract includes:
   1. Lungs, bronchi, bronchioles
   2. Trachea, alveoli
   3. Diaphragm, bronchi
   4. Nostrils, nasal cavity, pharynx
6. During inspiration, the diaphragm:
   1. Contracts and flattens
   2. Relaxes and rises
   3. Contracts and rises
   4. Remains dome-shaped
7. The diaphragm separates the thoracic cavity from the:
   1. Oral cavity
   2. Abdominal cavity
   3. Cranial cavity
   4. Pelvic cavity
8. The breathing centre is located in the:
   1. Pons
   2. Medulla of brain
   3. Cerebellum
   4. Spinal cord
9. What percentage of oxygen is transported dissolved in plasma?
   1. 0.07
   2. 0.23
   3. 0.03
   4. 0.7
10. Which of the following is not a symptom of emphysema?
    1. Shortness of breath
    2. Heart problems
    3. Wheezing
    4. Loss of hearing