Online MDcat Test Preparation Series Quiz-07

61. In which part of the respiratory system, gaseous exchange takes place?

1. Alveoli
2. Pharynx
3. Larynx
4. Trachea

 

62. ___________ is located between two pleural sacs and is the central compartment of the thoracic cavity?

1. Hilum
2. Pleura
3. Mediastinum
4. Thoracic cage

 

63. The tiny air sacs present in human lungs is called_______.?

1. Alveoli
2. Bronchus
3. Bronchioles
4. All of the above

 

64. Which of the following are parts of the human respiratory system?

1. The lungs
2. Trachea
3. Diaphragm
4. All of the above

 

65. Which of the following statements is true about involuntary breathing?

1. It is controlled by the alveolar-capillary network
2. It is controlled by the bronchioles
3. It is controlled by the pulmonary arterioles
4. It is controlled by the neurons, located in the medulla and pons

 

66. The total number of alveoli present in the human lungs is estimated to be around ______.

1. 800 million
2. 1 billion
3. 500 million
4. 1500 million

 

67. Which one of the following statements is false about the trachea?

1. Has C-shaped rings
2. It splits into the right and left lungs
3. It is covered by epiglottis
4. None of the above

 

68. Which of the following functions by filtering and keeping the mucus and dirt away from our lungs?

1. Cilia
2. Hairs in the lungs
3. Bronchioles
4. All of the above

 

69. The maximum volume of air contained in the lung by a full forced inhalation is called _________.

1. Tidal volume
2. Vital capacity
3. Ventilation rate
4. Total lung capacity

Feedback: Lung capacity or total lung capacity (TLC) is the volume of air in the lungs upon the maximum effort of inspiration. Among healthy adults, the average lung capacity is about 6 liters. Age, gender, body composition, and ethnicity are factors affecting the different ranges of lung capacity among individuals

 

70. Which one of the following is correct regarding larynx?

1. It houses the vocal cords
2. It prevents the invading pathogens into the trachea
3. It is an organ made of cartilage and connects the pharynx to the trachea
4. All of the above.