1. The dental formula of man is __________
a) i 2/2 c 1/1 pm 2/2 m 3/3
b) i 1/2 c 2/1 pm 2/2 m 3/3
c) i 1/1 c 1/2 pm 1/2 m 4/4
d) i 2/2 c 1/1 pm 3/2 m 2/3
Explanation: The dental formula indicates 2 incisors 1 canine 2 premolars and 3 molars on one side of upper mouth
2. ph of saliva is ___________
a) 6
b) 6.8
c) 7.5
d) 9.6
Explanation: ph of saliva is slightly alkaline range. The ph of saliva is around 6.8 to 7.1.
3. Salivary amylase is also known as _________
a) Gastrin
b) Glyoxylase
c) Pepsin
d) Ptyalin
Explanation: Digestion of carbohydrates begins from the mouth itself. It breaks starch into maltose and dextrin.
4. The esophagus connects _________
a) Mouth to throat
b) Throat to stomach
c) Mouth to stomach
d) Stomach to large intestine
Explanation: The esophagus is a muscular tube connecting the throat with a stomach. It is about 8 inches long.
5. The esophagus is also known as ________
a) Food pipe
b) Wind pipe
c) Stomach
d) Voice box
Explanation: It is also known as gullet. It is an organ through which food passes. It is aided by peristaltic contractions.
6. The esophagus is ____________ to the trachea.
a) Posterior
b) Anterior
c) Lateral
d) Dorsal
Explanation: Esophagus is located posterior to trachea in neck and thoracic regions of the body and passes through the esophageal hiatus of diaphragm on its way to the stomach.
7. An opening in the diaphragm called __________ hiatus allows the esophagus to pss through and connects to the stomach.
a) Esophageal
b) Diaphragmatic
c) Mediastinal
d) None
Explanation: Esophageal hiatus is an opening in the diaphragm through esophagus and the vagus nerve pass. It connects diaphragm to the spine.
8. The stomach is formed of __________ parts.
a) 3
b) 4
c) 2
d) 1
Explanation: The stomach is formed of 3 parts. They are the cardiac stomach, phyloric antrum and fundic part.
9. Inner mucosa of the stomach is raised into large number of folds called as _________
a) Villi
b) Cilia
c) Rugae
d) Capillaries
Explanation: Inner mucosa of the stomach is raised into large number longitudinal of folds called as gastric rugae. These rugae dilate the stomach to store food and also increase the surface area of digestion.
10. Enzyme rennin used in digestion is secreted from __________
a) Stomach
b) Liver
c) Intestine
d) Mouth
Explanation: Stomach is a muscular organ located on the left side of the upper abdomen. It receives food from e esophagus. Rennin is found in the stomach. It is an enzyme.