Chemical Coordination and Integration Test 6

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Chemical Coordination and Integration Test 6

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Weekly Quiz Competition

Question 1
1 / -0

The trypsin enzyme is secreted by

A
Stomach

B
Duodenum

C
Pancreas

D
Liver

Solution

Trypsin is produced in the pancreas as the inactive proenzyme trypsinogen. In the duodenum, trypsin catalyzes the hydrolysis of peptide bonds, breaking down proteins into smaller peptides.
Question 2
1 / -0

Cells of the pancreas are not digested by their own enzymes because

A
Enzymes are secreted in inactive form

B
Cells are not lined by mucous membrane

C
Enzymes are released only when needed

D
None of the above

Solution

The pancreatic enzymes are actually proto-enzymes; they require another chemical in the duodenum to transform into an actual enzyme. For example, trypsinogen, produced in the pancreas, activates in the presence of enterokinase, produced in the duodenum. When activated, trypsinogen becomes the enzyme trypsin. This method of activating an enzyme only in the duodenum protects the pancreas from destruction by its own enzyme production.
Question 3
1 / -0

The acinar cells loaded with zymogen granules can be seen in

A
Liver

B
Pancreas

C
Ovary

D
Kidney

Solution

Pancreas have dual nature exocrine and endocrine, endocrine secretes hormone and exocrine secretes digestive enzymes. Acinar cells are the exocrine part of the pancreas which stores zymogen granules which secrete and transports digestive enzymes.
So, the correct answer is 'pancreas'
Question 4
1 / -0

In pancreas, pancreatic juice and hormones are secreted by

A
Same cells

B
Different cells

C
Same cells at different times

D
None of the above

Solution

Pancreas have dual nature exocrine and endocrine, endocrine secretes hormone and exocrine secretes digestive enzymes. Acinar cells are the exocrine part of the pancreas which secretes pancreatic juice. Whereas beta cells of islets of Langerhans in the pancreas secrete insulin hormone and glucagon hormone is secreted by the alpha cell of islets of Langerhans. Thus, the correct answer is option B.
Question 5
1 / -0

Duct of Wirsung is a duct of

A
Liver

B
Pancreas

C
Gall bladder

D
Duodenum

Solution

Duct of Wirsung and duct of Santorini are found in pancreas. The pancreatic duct or duct of Wirsung (major pancreatic duct) joins the pancreas to the common bile duct to supply pancreatic juices to the duodenum.
Question 6
1 / -0

Deoxyribonuclease and ribonuclease are secreted by

A
Liver

B
Stomach

C
Pancreas

D
Kidney

Solution

Deoxyribonuclease and ribonuclease are the nucleases which catalyze the degradation of DNA and RNA respectively. They bring about the hydrolytic cleavage of phosphodiester bonds. These enzymes are present in the digestive juice and are secreted by acinar cells of the pancreas in their active forms along with other enzymes such as lipase and amylase. Thus, the correct answer is option C.
Question 7
1 / -0

Enzyme released from kidney is

A
Renin

B
Uricase

C
Pepsin

D
None of the above

Solution

Renin is the enzyme secreted by the kidney. Juxa glomerular cells present in kidney release renin. It activates the renin-angiotensin system and produces a rise in blood pressure. It has stretch receptors in the vascular walls which sense changes in renal perfusion pressure.
So, the correct answer is option A.
Question 8
1 / -0

How many kinds of cells are found in islet of Langerhans?

A
1

B
2

C
3

D
5

Solution

Islets of Langerhans are irregularly shaped patches of endocrine tissue located within the pancreas of most vertebrates. The islets consist of four distinct cell types. Alpha cells produce glucagon, beta cells produce insulin and amylin, delta cells produce somatostatin, gamma cells produce pancreatic polypeptide and epsilon cells produces ghrelin.
So, the correct answer is option D.

Question 9

1 / -0

The following flow chart represents the feedback loops that regulate secretion of thyroid hormones (T3 and T4). Such secretion essentially regulates the basic metabolism rate in mammals. The '+' and '' signs represent positive and negative regulation, respectively.
Three disease conditions are being studied where (x) the anterior pituitary fails to produce TSH, (y) the thyroid fails to produce T3 and T4 and (z) the hypothalamus fails to secrete TRH. In the Table below, match the hormone levels in column A with the disease conditions in column B.

	Column A		Column B
(i)	Low TRH, Low TSH and Low T3, T4	(x)	Anterior pituitary fails to produce TSH
(ii)	High TRH, High TSH and Low T3, T4	(y)	Thyroid fails to produce T3 and T4
(iii)	High TRH, Low TSH and Low T3, T4	(z)	Hypothalamus fails to secrete TRH

Which of the following is the correct match for the above?

(i) -(x) ; (ii)- (y) ; (iii)- (z)

(i)- (z) ; (ii)- (y) ; (iii)- (x)

(i)-(y) ; (ii) -(x) ; (iii) -(z)

(i) -(z) ; (ii)- (x) ; (iii)-(y)

Question 10
1 / -0

Which one of the following is not a second messenger in hormone action ?

A
cGMP

B
Calcium

C
Sodium

D
cAMP

Solution

Second messengers are the organic molecules and sometimes the metal ions, acting as intracellular signals, whose production or release usually amplifies a signal such as a hormone, received at the cell surface. Sodium (Na) is not a second messenger to be discovered. In addition to cyclic AMR Cyclic Guanosine Monophosphate (CGMP) functions as a second messenger in certain cases. Calcium ions (Ca++) also act as second messenger in phospholipase c - ca* second messenger system.

So, the correct answer is 'Sodium'.

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Chemical Coordination and Integration Test 6

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Chemical Coordination and Integration Test 6

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SHARING IS CARING

Question 1

Stomach

Duodenum

Pancreas

Liver

Solution

Question 2

Enzymes are secreted in inactive form

Cells are not lined by mucous membrane

Enzymes are released only when needed

None of the above

Solution

Question 3

Liver

Pancreas

Ovary

Kidney

Solution

Question 4

Same cells

Different cells

Same cells at different times

None of the above

Solution

Question 5

Liver

Pancreas

Gall bladder

Duodenum

Solution

Question 6

Liver

Stomach

Pancreas

Kidney

Solution

Question 7

Renin

Uricase

Pepsin

None of the above

Solution

Question 8

1

2

3

5

Solution

Question 9

(i) -(x) ; (ii)- (y) ; (iii)- (z)

(i)- (z) ; (ii)- (y) ; (iii)- (x)

(i)-(y) ; (ii) -(x) ; (iii) -(z)

(i) -(z) ; (ii)- (x) ; (iii)-(y)

Question 10

cGMP

Calcium

Sodium

cAMP

Solution

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