Human Anatomy Multiple Choice Questions on “Digestive Apparatus – Mouth, Esophagus & Stomach”.
1. How many types of teeth are present?
A. 3
B. 4
C. 5
D. 2
Answer: B
Clarification: Permanent teeth of man are 4 types. They are incisors, canines premolars and molars.
2. Which structure closes the internal nares during swallowing of food bolus?
A. Uvula
B. Tongue
C. Palate
D. Larynx
Answer: A
Clarification: 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.
3. Crown of teeth is covered by ________
A. Dentine
B. Enamel
C. Pinocytic
D. Muscles
View Answer
Answer: b
Clarification: 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.
4. 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
Answer: a
Clarification: The dental formula indicates 2 incisors 1 canine 2 premolars and 3 molars on one side of upper mouth.
5. ph of saliva is ___________
A. 6
B. 6.8
C. 7.5
D. 9.6
Answer: B
Clarification: ph of saliva is slightly alkaline range. The ph of saliva is around 6.8 to 7.1.
6. Salivary amylase is also known as _________
A. Gastrin
B. Glyoxylase
C. Pepsin
D. Ptyalin
Answer: d
Clarification: Digestion of carbohydrates begins from the mouth itself. It breaks starch into maltose and dextrin.
7. The esophagus connects _________
A. Mouth to throat
B. Throat to stomach
C. Mouth to stomach
D. Stomach to large intestine
Answer: b
Clarification: The esophagus is a muscular tube connecting the throat with a stomach. It is about 8 inches long.
8. The esophagus is also known as ________
A. Food pipe
B. Wind pipe
C. Stomach
D. Voice box
Answer: a
Clarification: It is also known as gullet. It is an organ through which food passes. It is aided by peristaltic contractions.
9. The esophagus is ____________ to the trachea.
A. Posterior
B. Anterior
C. Lateral
D. Dorsal
View Answer
Answer: A
Clarification: 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.
10. 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
View Answer
Answer: A
Clarification: Esophageal hiatus is an opening in the diaphragm through esophagus and the vagus nerve pass. It connects diaphragm to the spine.
11. The stomach is formed of __________ parts.
A. 3
B. 4
C. 2
D. 1
View Answer
Answer: A
Clarification: The stomach is formed of 3 parts. They are the cardiac stomach, phyloric antrum and fundic part.
12. Inner mucosa of the stomach is raised into large number of folds called as _________
A. Villi
B. Cilia
C. Rugae
D. Capillaries