1. ___________ delivers deoxygenated blood to the lungs.
a) Pulmonary vein
b) Aorta
c) Left ventricle
d) Pulmonary artery
Explanation: Pulmonary artery carries deoxygenated blood from right ventricle to the lungs. The blood passes through capillaries adjacent to alveoli and becomes oxygenated as a part of respiration process.
2. The inner layer that surrounds the lung itself is called ________
a) Parietal Pleura
b) Lobar bronchi
c) Pleuracardium
d) Visceral Pleura
Explanation: Visceral Pleura is a delicate membrane that covers the surface of each lung and dips into fissures between the lobes. It also separates the pleural cavity from the mediastinum.
3. Gas exchange in lungs occurs in __________
a) Alveolar sacs
b) Segmental Bronchi
c) Bronchioles
d) Alveolar sinus
Explanation: Alveoli are tiny sacs in our lungs. It allows oxygen and carbon dioxide to move between the lungs and bloodstream.
4. How many secondary bronchi are there in the right lung?
a) 2
b) 3
c) 4
d) 1
Explanation: There are 3 secondary bronchi in right lung. It delivers oxygen to three lobes of the right lung. The lobes are superior middle and inferior lobe.
5. Which of the following supports epiglottis?
a) Cricoid cartilage
b) Thyroid
c) Ribs
d) Lungs
Explanation: Cricoid cartilage is located slightly below the thyroid cartilage. This cartilage consists of strong connective tissue consisting the dorsal part of larynx.
6. Point where bronchial enters lung is ___________
a) Manus briosternal
b) Hilus
c) Bronchi
d) Carina
Explanation: It is also known as hilum. They consist of major bronchi and pulmonary arteries and veins. It is found in medial aspect of each lung
7. Place where trachea bifurcates into right and left bronchus is ____________
a) Trachea
b) Bronchi
c) Hilus
d) Carina
Explanation: Carina is a ridge of cartilage in the trachea that occurs between the divisions of the two main bronchi. It occurs at the lower end of the trachea
8. How many types of teeth are present?
a) 3
b) 4
c) 5
d) 2
Explanation: Permanent teeth of man are 4 types. They are incisors, canines premolars and molars.
9. Which structure closes the internal nares during swallowing of food bolus?
a) Uvula
b) Tongue
c) Palate
d) Larynx
Explanation: During solling the soft palate and the uvula moves up close off the nasopharynx preventing food from entering nasal cavity. When this process fails it results in nasal regurgitation.
10. Crown of teeth is covered by ________
a) Dentine
b) Enamel
c) Pinocytic
d) Muscles
Explanation: Enamel is the hardest and most highly mineralized substance of the body. It covers the outer layer of each tooth. Enamel is made up of minerals primarily hydroxyapatite.