Animal nutrition (digestion and absorption)

DAILY PRACTICE PAPER (DPP):

1.This process of conversion of complex food substances to simple absorbable forms is

called digestion and is carried out by our digestive system by

1. Mechanical methods
2. Biochemical methods.
3. Both 1 and 2
4. Only 2

Ans 3

2.Two sets of teeth, a set of temporary milk or deciduous teeth replaced by a set of permanent or

adult teeth, occur during the life of.

1. Majority of mammals
2. Majority of reptiles
3. Majority of amphibians
4. Majority of fishes

Ans 1

3. Arrangement of teeth in each half of the upper and lower jaw in the

order I, C, PM, M is represented by a dental formula which in human

is

1. 2123/2123
2. 2213/2213
3. 2132/2132
4. 2321/2321

Ans 1

4.Which of the following statements is incorrect w.r.t. alimentary canal of human beings

1. The opening of the stomach

into the duodenum is guarded by the pyloric

sphincter.

2. Jejunum opens into the large

intestine.

3. Large intestine consists of caecum, colon and

rectum.

4. Caecum is a small blind sac which

hosts some symbiotic micro-organisms. A

narrow finger-like tubular projection, the

vermiform appendix which is a vestigial

organ, arises from the caecum.

Ans 2

5. The wall of alimentary canal from oesophagus to rectum possesses four layers namely serosa, muscularis, sub-mucosa and mucosa. Choose the false w.r.t. the wall of alimentary canal

1. Serosa is the outermost layer and is made up of a thin

mesothelium (epithelium of visceral organs)

with some connective tissues.

1. Muscularis is formed by smooth muscles usually

arranged into an outer circular and an inner

longitudinal layer.

1. The submucosal layer is formed of loose connective tissues containing nerves, blood and lymph

vessels.

1. The innermost layer lining the lumen of the alimentary canal is the mucosa

Ans 2

6. The innermost layer lining the

lumen of the alimentary canal is the mucosa. Which one of the following statements is not true about mucosa

1. This layer forms irregular folds (rugae) in the stomach

and small finger-like foldings called villi in the

small intestine.

1. The cells lining the villi produce numerous microscopic projections

called microvilli giving a brush border

appearance. These modifications increase the

surface area enormously.

1. Villi are supplied with a network of capillaries and a large lymph vessel

called the lacteal.

1. Mucosal epithelium has goblet cells which secrete digestive enzymes

Ans 4

7. The hepatic lobules are the structural and

functional units of liver containing hepatic cells arranged in the form of

cords. Each lobule is covered by a thin connective tissue sheath called

the

1. Glisson’s capsule.
2. Renal capsule
3. Cord capsule
4. All the above

Ans 1

8. The duct of gall bladder is called as
9. cystic duct
10. hepatic duct
11. bile duct
12. hepatopancreatic duct

Ans 1

9. A common duct, that opens into the duodenum

and is  guarded by a sphincter

called the sphincter of Oddi,is formed by combination of

1. cystic duct and  hepatic duct
2. bile duct and  hepatic duct
3. pancreatic duct and cystic duct
4. bile duct and the pancreatic duct

ans 4

10. The saliva secreted into the oral cavity contains

1. electrolytes (Na+, K+, Cl–, HCO–)
2. salivary amylase
4. All of the above

Ans 4

11. The mucosa of stomach has gastric glands. Choose the Gastric gland that has not been matched with its appropriate function

(1) neck cells secrete mucus;

(2) peptic or chief cells which secrete the proenzyme pepsinogen

(3) parietal or oxyntic cells which secrete HCl and intrinsic factor

(factor essential for absorption of vitamin B12).

4) Neck Cells secrete pepsinogen

Ans 4.