Digestion and Absorption Test

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Digestion and Absorption Test - 64

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is the primary absorptive process in the large intestine?

A
Active transport of $$Na^+$$ from the lumen to the blood

B
Absorption of amino acids and fructose

C
Active transport of potassium from the lumen to the blood

D
Active absorption of $$HCO_3$$ into the blood

Solution

A. Active transport of Na+ from the lumen to the blood.
Solution: Large intestine has a high capability for active absorption of sodium ions which create a gradient for chloride ions absorption as well. This forms an osmotic gradient across the large intestinal mucosa causing absorption of water.
Question 2
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Select what is not true of intestinal villi among followings.

A
They possess microvilli.

B
They increase the surface area.

C
They are supplied with capillaries and the lacteal vessels.

D
They only participate in digestion of fats.

Solution

Intestinal villi are the numerous small finger-shaped projections which increase the absorptive surface area, they contain abundant blood capillaries and lymph vessels, they do not participate in the digestion of fats but helps in absorption of fats and other food substances.

So, the correct option is 'They only participate in the digestion of fats.'
Question 3
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Rennin and lactase, the enzymes required to digest milk, disappear in the human body by the age of

A
Five

B
Three

C
Two

D
Eight

Solution

Rennin is an aspartic endopeptidase belonging to MEROPS A1 family. It is produced by newborn ruminant animals in the lining of the abomasum to curdle the milk they ingest, allowing a longer residence in the bowels and better absorption. It is widely used in the production of cheese. Lactase is an enzyme produced by many organisms. Lactase can be purchased as a food supplement, and is added to milk to produce "lactose-free" milk products. Lactase is the enzymes that splits lactose (milk sugar) into glucose and galactose. The enzymes necessary to break down and digest milk (rennin and lactase) are all gone by the age of three in most humans.
So the correct option is 'three'.
Question 4
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Which of the following is the most rapidly transported monosaccharide into the bloodstream from the intestine?

A
Mannose

B
Glucose

C
Galactose

D
Fructose

Solution

Transportation of galactose is most rapid as it attaches with sodium ion and easily dragged by the protein carries so it is very easy to transport it while glucose and fructose require energy to transport as they are transported by active transport.
So the correct option is 'Galactose'.
Question 5
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Which of the following statement is incorrect related to digestion?

A
Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules.

B
It is a anabolic process.

C
Digestion is both voluntary and involuntary process.

D
None of these.

Solution

A) Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules.
B) It is a catabolic process as it breaks down the molecule into a simple form.
C) It is voluntary until swallowing as food is swallowed the whole process becomes involuntary.

So the correct option is '(B) It is an anabolic process.
Question 6
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Which of the following are secreted by duodenum or small intestine?

A
Enterokinin

B
Secretin

C
Villikinin

D
All of the above

Solution

(A) Enterokinin is the hormone secreted by Brunner's gland activates the inactive enzyme of the pancreas and convert procarboxypeptidase into carboxypeptidase.
(B) Secretin secreted bu duodenum into blood stimulates the secretion of the pancreas and liver.
(C) VIlikinin is released by duodenal mucosa and increases the motility of villi.
So the correct option is 'All of the above.
Question 7
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A muscular structure that regulates the opening of the oesophagus into the stomach is known as

A
Epiglottis

B
Lower esophagus sphincter

C
Pyloric sphincter

D
Sphincter of Oddi

Solution

A. The epiglottis is a leaf-shaped cartilaginous flap located behind the tongue. It prevents the entry of food in the windpipe by sealing off the windpipe while eating the food.
B. Lower oesophagus sphincter, also known as a cardiac orifice, is the opening of the oesophagus into the stomach. It regulates the opening of the oesophagus into the stomach.
C. Pyloric sphincter is found between the duodenum and posterior stomach. It regulates the opening of the duodenum into the stomach.
D. Sphincter of Oddi is the opening of the hepatopancreatic duct into the duodenum.
So, the correct answer is 'Lower oesophagus sphincter'.
Question 8
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In which of the following parts of the alimentary canal does absorption of nutrients and drugs takes place?

A
Mouth

B
Stomach

C
Small intestine

D
All of the above
Question 9
1 / -0

Where in the human body would you find ilium?

A
Leg

B
In the abdomen

C
Near the hip

D
Chest

Solution

The ilium is the largest of three bones that fuse together over time to comprise the outer sections of the pelvis.
So the correct option is C. ( Near the hip )
Question 10
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Which of the following substances are not absorbed into the lymphatic system?

A
Fatty acids

B
Glycerol

C
Fat soluble vitamins

D
Water soluble vitamins

Solution

Water-soluble vitamins are directly absorbed into the intestine and transported to water as they do not require any emulsification because water is free to move in and out but fat soluble liquids absorb into lymph due to their insolubility in water and they need to emulsify before absorption.
So the correct option is 'Water-soluble vitamins'

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Digestion and Absorption Test - 64

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Digestion and Absorption Test - 64

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SHARING IS CARING

Question 1

Active transport of $$Na^+$$ from the lumen to the blood

Absorption of amino acids and fructose

Active transport of potassium from the lumen to the blood

Active absorption of $$HCO_3$$ into the blood

Solution

Question 2

They possess microvilli.

They increase the surface area.

They are supplied with capillaries and the lacteal vessels.

They only participate in digestion of fats.

Solution

Question 3

Five

Three

Two

Eight

Solution

Question 4

Mannose

Glucose

Galactose

Fructose

Solution

Question 5

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules.

It is a anabolic process.

Digestion is both voluntary and involuntary process.

None of these.

Solution

Question 6

Enterokinin

Secretin

Villikinin

All of the above

Solution

Question 7

Epiglottis

Lower esophagus sphincter

Pyloric sphincter

Sphincter of Oddi

Solution

Question 8

Mouth

Stomach

Small intestine

All of the above

Question 9

Leg

In the abdomen

Near the hip

Chest

Solution

Question 10

Fatty acids

Glycerol

Fat soluble vitamins

Water soluble vitamins

Solution

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