The mucosal layer in the stomach form irregular folds known as:-

  • villi
  • lumen
  • rugae
  • crypts of Lieberkuhn

What regulates the opening of oesophagus into the stomach?

  • A membranous valve

  • A muscular sphincter

  • A mesodermal septum

  • A cartilaginous flap

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

(vitamin)

Column II

(source)

I. A

II. B1

III. PP

IV. C

1. cereals

2. carrot

3. citrus fruits

4. synthesized in human body

Codes:

                I            II            III            IV

  • 4.             1            2             4               3

  • 3.             2            1             3               4

  • 1.             1            2             3               4

  • 2.             2            1             4               3

Which cells of ‘Crypts of Lieberkuhn' secrete antibacterial lysozyme?

  • Argentaffin cells

  • Paneth oaks

  • Zymogen cells

  • Kupffer cells

A baby boy aged two years is admitted to play-school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

  • Incisors

  • Canines

  • Premolars

  • Molars

Which of the following guards the opening of hepatopancreatic duct into the duodenum ?

  • Illeocaecal valve

  • Pyloric sphincter

  • Sphincter of Oddi

  • Semilunar valve

In the stomach, gastric acid is secreted by the:-

  • parietal cells

  • peptic cells

  • acidic cells

  • gastrin secreting cells

The primary dentition in human differs from permanent dentition in not having one of the

following type of teeth

  • Canine                   

  • Premolars

  • Molars                   

  • Incisors

The enzyme that is not present in succus entericus is

  • maltase

  • nucleases

  • nucleosidase

  • lipase

Which of the following statement is not correct ?

  • Brunner's glands are present in the submucosa of stomach and secret pepsinogen.

  • Goblet cells are present in the mucosa of intestine and secret mucus.

  • Oxyntic cells are present in the mucosa of stomach and secret HCl.

  • Acini are present in the pancreas and secrete carboxypeptidase

Gastric juice of infants contains?

  • maltase, pepsinogen, rennin

  • nuclease, pepsinogen, lipase

  • pepsinogen, lipase, rennin

  • amylase, rennin, pepsinogen

Which of the following enzymes carries out the initial step in the digestion of milk in

humans?

  • Rennin

  • Lipase

  • Trypsin

  • Pepsin

Which one of the following statement is false regarding digestion and absorption of food

in humans?

blood capillaries.

 

  • Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

  • Glucose and amino acids are absorbed with the help of carrier ions like Na+.

  • Chylomicrons are small lipoprotein particles that are transported from intestine into

  • About 30% of starch is hydrolysed by salivary amylase in our mouth.

What will happen if the secretion of parietal cells of gastric glands is blocked with an

inhibitor?

enzyme pepsin

converted to trypsin

  • Gastric juice will be deficient in chymosin

  • Gastric juice will be deficient in pepsinogen

  • In the absence of HCl secretion, inactive pepsinogen is not converted into the active

  • Enterokinase will not be released from the duodenal mucosa and so trypsinogcn is not

Which one of the following is the correct matching of the site of action on the given

substrate, the enzyme acting upon it and the end product?

  • Duodenum :Triglycerides→Trypsin→Monoglycerides
  • Small intestine :Starch→α-amylase→Disaccharide (maltose)
  • Small intestine :Proteins→Pepsin→Amino Acids
  • Stomach :Fats→ Lipase→Micelles

The following is a scheme showing the fate of carbohydrates during digestion in the

human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C

and D. Choose the correct option from those given.
  • A = Amylase, B = Maltase, C = Lactase,D = Invertase

  • A = Amylase, B = Maltase, C = Invertase,D = Lactase

  • A = Amylase, B = Invertase, C = Maltase, D = Lactase

  • A = Amylase, B = Lactase, C = Maltase, D = Invertase

During digestion, before the action of lipase, fat is emulsified by:-

  • ergosterols

  • phospholipids

  • lipoproteins

  • digitonin

Which of the folowing teeth are lophodont ?

  • Incisor and canine

  • Canine and premolar

  • Premolar and molar

  • Premolar and incisor

Which of the following digestive juices has the minimum pH value ?

  • Gastric juice

  • Saliva

  • Bile

  • Pancreatic juice

In adults, curdling of the milk in small intestine occurs due to the action of

  • rennin

  • erypsine

  • trypsin

  • chymotrypsin

Excessive stimulation of vagus nerve in humans may lead to:

  • hoarse voice

  • peptic ulcers

  • efficient digestion of proteins

  • irregular contractions of diaphragm.

Which one of the following pairs of the kind of cells and their secretion is correctly matched ?

  • Oxyntic cells --- a secretion with pH between 2.0 and 3.0

  • Alpha cells of islets of Langerhans ---- secretion that decreases blood sugar level

  • Kupffer cells --- a digestive enzyme that hydrolyses nucleic acids

  • Sebaceous glands --- a secretion that evaporates for cooling

Which match is true?
  • 1
  • 2
  • 3
  • 4

A child took sugar cane and sucked its juice. Regarding this which of the following match is correct ?

 

Substrate

Enzyme

Site of secretion of enzyme

Products formed

(1)

Proteins

Pepsin

Duodenum

Polypetides

(2)

Starch

Amylase

Salivary glands

Glucose

(3)

Lipids

Lipase

Pancreas

Fat globules

(4)

Sucrose

Invertase

Duodenum

Glucose + Fructose
  • 1
  • 2
  • 3
  • 4

Which of the following gastric secretions is correctly matched with its source?

  • Pepsin-Chief cells

  • Chymotrypsin-Parietal cells

  • HCl-Goblet cells

  • Mucus-Oxyntic cells

Wharton's duct is the duct of

  • submandibular salivary gland

  • paritid gland

  • sublingual gland

  • all of these.

Which of the following option is correct regarding digestion of food substrates ?
  • 1
  • 2
  • 3
  • 4

In mammals, the teeth are.
I. only two sets, present throughout life.
II. embedded in the socket of the jaw bones.
III. different types.

These conditions are respectively referred as

  • diphyodont, heterodont and thecodont
  • diphyodont, thecodont and heterodont
  • the codont, diphyodont and heterodont
  • thecodon, heterodont and diphyodont

Wernickes syndrome is generally common in alcoholic person; which is characterised by less mental activity and dual vision. It is caused by the deficiency of

  • riboflavin

  • pyridoxine

  • thiamine

  • retinol

Brunner's gland are characteristic feature of:-

  • jejunum of small intestine

  • ileum

  • duodenum

  • fundic region of stomach

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Practice Zoology Quiz Questions and Answers