Digestive System – 1
1. Which of the following is not a major component of our food?
A. Carbohydrates
B. Proteins
C. Fats
D. Minerals
Answer: D
Explanation: Minerals doesn’t belong to the category of major components of food. Carbohydrates are most required by the body to meet the energy requirements. Proteins are next important for meet growth requirements of the body. Fats are required by the body for insulation of organs as well as to energy requirements in absence of carbohydrates in the diet.
2. Trachea serves as a common passage for food and air.
A. True
B. False
Answer: B
3. The process of conversion of complex food substances into simple absorbable forms _________
A. Digestion
B. Excretion
C. Respiration
D. Circulation
Answer: A
Explanation: Digestion is the process of conversion of food substrates into digestible form. Excretion is the process of release of undigested and required wastes of the body. Respiration is the process of exchange of O2 from atmosphere with CO2 produced by the cells. Circulation is the process of transport of connective tissues blood in the body and the elements it carries.
4. Statement A: The opening of wind pipe is called gastro-esophageal sphincter.
Statement B: Its covering prevents the entry of food.
A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer: D
Explanation: Trachea is the wind pipe. It has a cartilaginous flap called epiglottis. It prevents the entry of food into the glottis during swallowing.
5. Statement A: Water is important for repair of tissues.
Statement B: It also prevents dehydration of the body.
A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer: C
Explanation: Food is important for the repair of tissues as well as their growth. Water is essential for metabolic processes. It also prevents dehydration of the body. Body is made up of 70% water.
6. Humans have acrodont form of dentition.
A. True
B. False
Answer: B
Explanation: Humans have thecodont type of dentition. In this type, each tooth is embedded in the socket of jaw bone. Acrodont type of dentition is found in fish and amphibians. In this form of dentition teeth are attached to the top surface of the jaw bone.
7. Statement A: The alimentary canal begins with an anterior opening-the anus.
Statement B: The alimentary canal ends with a posterior opening-the mouth.
A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer: B
Explanation: The alimentary canal is the part of digestive system in the movement of food takes places. It begins with an anterior opening–the mouth. It ends with the posterior opening–the anus.
8. Which portion of stomach opens into small intestine?
A. Cardiac portion
B. Fundic portion
C. Pyloric portion
D. Body portion
Answer: C
Explanation: Stomach is J shaped bag like structure which temporarily stores food. It is divided into Fundus, Cardiac, Body and Pyloric regions. The pyloric region opens into the small intestine via Pyloric sphincter.
9. The hard chewing surface of the teeth is ________
A. enamel
B. tongue
C. frenulum
D. papillae
Answer: A
10. The oral cavity leads into the trachea.
A. True
B. False
Answer: B
Explanation: The oral cavity leads into a short pharynx which serves as a common passage for food and air. Arrangement of tonsils in a ring-like manner in the pharynx is called as Waldeyer’s ring.
11. Epiglottis is made up of which of the following tissues?
A. Ligament
B. Tendon
C. Cartilage
D. Bone
Answer: C
Explanation: A cartilaginous flap called epiglottis prevents the entry of food into the glottis- the opening of the windpipe-during swallowing. The oesophagus and the trachea open into the pharynx.
12. Which of the following is not correct regarding oesophagus?
A. Thick
B. Long tube
C. Passes through neck
D. Extends posteriorly
Answer: A