Free Digestion MCQs with Answers

• A. Filtration
• B. pH adjustment
• C. Moistening
• D. Temperature adjustment

Explanation: The nasal cavity functions to humidify, warm, filter, and act as a conduit for inspired air, as well as protect the respiratory tract…

• A. Larynx
• B. Esophagus
• C. pharynx
• D. Epiglotis

Explanation: Larynx is also known as voice box and has vocal cords for sound production.

• A. Epiglottis
• B. Esophegeal sphineter
• C. Uvula
• D. Respiratory valve

Explanation: During swallowing backward movement of tongue pushes the soft palate up and closes the nasal opening at the back.

• A. Epiglottis
• B. Esophagal sphiniter
• C. Soft palate
• D. Tongue

Explanation: The soft palate is a muscular structure that is located at the back of the roof of the mouth, or the hard palate.

• A. Abdominal cavity
• B. Thoracic cavity
• C. Pelvic cavity
• D. pleural cavity

Explanation: The cavity bounded by the ribs and diaphragm is called the thoracic cavity, or chest cavity.

• A. 1mm
• B. 0.1mm
• C. 1um
• D. 1nm

Explanation: Bronchioles have circular smooth muscles. Cartilage and ciliated epithelium are absent in bronchioles.

• A. Connective tissues
• B. Goblet cells
• C. Circular smooth muscles
• D. Endothelial cells

Explanation: Air sac is functional unit of the lungs. Air sac consists of several microscopic single layered structure calles alvcoli.

• A. Alveoli
• B. Bronchioles
• C. Air sacs
• D. Epithelial cells

Explanation: Alveoli: The alveoli are the specialized air-sacs (outpouching) of 200 µm diameter.

• A. Double layered structures
• B. Single layered structure
• C. Triple layered structures
• D. Epithelial cells

Explanation: Alveoli are microscopic balloon-shaped structures located at the end of the respiratory tree.

• A. Pleura
• B. Peritoneum
• C. Diaphragm
• D. Serosa

Explanation: Diaphragm is the floor of chest cavity and is responsible for holding up the chest cavity.

• A. Protection
• B. Moisten
• C. Temperature regulation
• D. All A, B and C

Explanation: Air while passing through the nasal cavity becomes warm, moist and filtered of smallerr foriegn particles by mucous membrane.

• A. Cillated epithilium
• B. Squamous epithilum
• C. Cuboidal epithilium
• D. Columnar epithilium

Explanation: The alveolus is composed of alveolar epithelial type 1 cells, alveolar epithelial type 2 cells and capillary cells.

• A. 1
• B. 3
• C. 2
• D. 4

Explanation: In the glottis, the mucous membrane is stretched across into two thin edged fibrous bands called vocal cords, which help in sound…

• A. Dorsal
• B. Medial
• C. Ventral
• D. Lateral

Explanation: Ventral is the underside of an organism or an organ.

• A. Vocal cords
• B. Epiglottis
• C. Glottis
• D. Trachea

Explanation: In the glottis, the mucous membrane is stretched across into two thin edged fibrous bands called vocal cords, winch help in sound…

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: Pharynx has three sections: (i) Nasopharynx, (ii) Oropharynx and (iii) Laryngopharynx

• A. "O" shaped
• B. "C" shaped
• C. "D" Shaped
• D. "G" shaped

Explanation: C-shaped cartilaginous rings reinforces the anterior and lateral sides of the trachea to protect and maintain the airway open.

• A. Trachea
• B. Bronchus
• C. Alveoli
• D. Nose

Explanation: Air sac is the functional unit of the lungs. Air sac consists of several microscopic single layered structures called alveoli.

• A. Alveoli
• B. Bronchi
• C. Bronchioles
• D. Trachea

Explanation: Pharynx is common for digestion and respiration. Air from pharynx moves to trachea and food is pushed to esophagus with the help of…

• A. 1.2 cm
• B. 1 mm
• C. 1 cm
• D. 1.2 mm

Explanation: When the diameter of bronchi becomes 1 mm or less and it is devoid of cartilage is named as bronchioles.