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COMPETITIVE EXAM

DOCTORS LISTING

Physiology-PHY8 Language : English Your Physiology SCORE

Text Size A- A+

Total Score : 9.36

Q.1

Kidney produces
a) Vasopressin
b) Erythropoietin
c) Renin
d) Angiotensinogen
e) 25 hydroxy vit D

A. BC

B. ABC

C. AdE

D. Abcd

Explanation :

Hormones secreted by Kidney

- Renin

- Erythropoietin

- 1,25 DHCC

Q.2

Substrate which is both secreted & filtered

A. Uric Acid

B. Glucose

C. Urea

D. Na+

Explanation :

Substances those are both filtered and secreted

K+, Uric acid, creatinine (minimally secreted)

Q.3

Myentric plexus is present in

A. Muscularis externa

B. Submucosa

C. Mucosa

D. Serosa

Explanation :

Between the circular and longitudinal muscle layer lies the Auerbach plexus/ Myenteric plexus.

Q.4

Highest concentration of potassium is in?

A. Bile

B. Pancreatic juice

C. Terminal ileal secretions

D. Rectal fluid

Explanation :

Colon and rectal secretion contain highest concentration of K+.

Q.5

Rennin is present in

A. Gastric juice

B. Liver

C. Kidney

D. Lung

Explanation :

Rennin/ Chymosin- Secreted by chief cells in stomach.

Q.6

Normal gastric juice contains all except

A. Na+

B. K+

C. Ca++

D. Mg++

Explanation :

Contents of gastric juice

- Cations

Na+
K+
Mg+2
H+

- Anions

Cl-
PO4-2
SO4-2

- Pepsin

- Gastric lipase

- Mucus

- Intrinsic factor of Castle

Q.7

Parietal cell secretes

A. Mucous

B. Pepsinogen

C. Gastrin

D. Intrinsic factor

Explanation :

Secretions of stomach

- HCl- Parietal cells/ Oxyntic cells

- The intrinsic factor of Castle- Parietal cells/ Oxyntic cells

- Pepsinogen- Chief cells/ Peptic cells

- Gastrin- G cells

- Somatostatin- D cells

- Histamine- ECL cells

Q.8

Which inhibits gastric secretion?

A. Secretin

B. High gastric pH

C. Insulin

D. Calcium

Explanation :

HCl secretion

- Stimulated by

Acetylcholine- Cephalic and Gastric phase (Vaso vagal reflex)
Gastrin- Gastric and Intestinal phase
Histamine

- Inhibited by

Acid (low pH)
Somatostatin
Secretin
Cholecystokinin
GIP
VIP

Q.9

Cephalic phase of gastric secretion

A. On food entering stomach

B. On food entering intestine

C. On seeing food

D. On stress

Explanation :

Sight, smell, though, the taste of food or even increased appetite will stimulate the cephalic phase of gastric secretion.

Q.10

Gastric acid decreased by

A. Secretin

B. Vagal Stimulation

C. Proteins in gastric fluids

D. Gastric antral distension

Explanation :

HCl secretion

Acetylcholine- Cephalic and Gastric phase (Vaso vagal reflex)
Gastrin- Gastric and Intestinal phase
Histamine

- Inhibited by

Acid (low pH)
Somatostatin
Secretin
Cholecystokinin
GIP
VIP

Q.11

Bilirubin secretion is stimulated by

A. Bile salts

B. Bile pigments

C. Secretin

D. CCK

Explanation :

Bile salts are the most important cholerectic or the substance that increases bile secretion. Cholecystokinin (CCK) is the most important cholagogue or substance that increases gallbladder contraction.

Q.12

Chymotrypsinogen is a

A. Zymogen

B. Carboxypeptidase

C. Transaminase

D. Elastase

Explanation :

Chymotrypsinogen is the inactive precursor form of Chymotrypsin. The precursor forms are called as a zymogen.

Q.13

Trypsinogen is converted to trypsin by

A. Pepsin

B. Enterokinase

C. HCl

D. None

Explanation :

Enterokinase converts Trypsinogen to Trypsin initially. These trypsin can further activate more trypsinogen to trypsin.

Q.14

Iron is actively absorbed in

A. Stomach

B. Duodenum and proximal jejunum

C. Large intestine

D. Ileum

Explanation :

Iron is mainly absorbed in Duodenum and proximal region of Jejunum.

Q.15

Vitamin B12 is absorbed in

A. Duodenum

B. Jejunum

C. Ileum

D. Stomach

Explanation :

For the absorption of Vit B12, it has to form a complex with the Intrinsic factor. This complex has a receptor on the epithelial cell surface of the ileum. Once attached, the complex is absorbed.

Q.16

Intestinal absorption is faster for

A. Hexoses

B. Disaccharides

C. Oligosaccharides

D. Polysaccharides

Explanation :

In the intestine, absorption is faster in case of monosaccharides when compared to disaccharides or polysaccharides. Glucose, fructose and galactose are hexoses which are monosaccharides.

Q.17

Fastest absorbing sugar in the intestine

A. Glucose

B. Sucrose

C. Maltose

D. Mannose

Explanation :

In the intestine, absorption is faster in case of monosaccharides when compared to disaccharides or polysaccharides. Glucose, fructose and galactose are hexoses which are monosaccharides.

Q.18

Main enzyme involved in digestion of fatty food

A. Pancreatic lipase

B. Lingual lipase

C. Gastric lipase

D. Phospholipase

Explanation :

Ebner’s glands on the dorsum of the tongue secrete lingual lipase and the stomach also secretes a lipase (gastric lipase}.

However, they are of very little significance in fat digestion.

Fat digestion essentially begins in the duodenum with the entry of pancreatic and biliary secretions.

Pancreatic juice contains lipase (pancreatic lipase), the most important enzyme for fat digestion.

The pancreatic lipase digests triglycerides (triacylglycerols) into free fatty acids and 2-monoglycerides (2- monoacylglycerols).

Q.19

Brunner's glands are seen in:

A. Duodenum

B. Stomach

C. Esophagus

D. Colon

Explanation :

Brunner's glands - They are compound mucous glands.

They are located in the wall of the first few centimetres of the duodenum, mainly between the pylorus of the stomach and the papilla of Voter.

where pancreatic secretion and bile empty into the duodenum. Brunner’s glands are stimulated by tactile or irritating stimuli on the duodenal mucosa, vagal stimulation & secretin.

They are inhibited by sympathetic stimulation. Mucus secreted by Brunner’s glands protects the duodenal wall from digestion by the highly acidic gastric juice.

Q.20

All are actions of CCK except

A. Relax lower esophageal sphinctor

B. Increased pancreatic secretion

C. Increased gastric secretion

D. Causes GB contraction

Explanation :

Actions of CCK

- Stimulates pancreatic enzymes secretion.

- Stimulates enterokinase secretion.

- Stimulates insulin secretion.

- Stimulates glucagon secretion.

- Potentiates Secretin

- Increases pyloric sphincter tone.

- Inhibits gastric emptying

- Stimulates gall bladder contraction

- Stimulates small intestinal and colonic motility

- Relaxes lower esophageal sphincter

- Trophic effect on the pancreas

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Exam Start Time :10:29:21 pm

Exam Submit Time :11:41:45 am

Number Of Questions

Q.01Q.02Q.03Q.04Q.05Q.06Q.07Q.08Q.09Q.10Q.11Q.12Q.13Q.14Q.15Q.16Q.17Q.18Q.19Q.20

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