All of the following is true about the digestive system, except

Digestive enzymes from the pancreas are released via a duct into the duodenum.

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Peristalsis is a wave of smooth-muscle contraction that proceeds along the digestive tract.

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In the small intestine, villi absorb nutrients into both the lymphatic and circulatory systems.

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The low pH of the stomach is essential in order for carbohydrate digestive enzymes to function.

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The release of bile from the gallbladder is triggered by the hormone cholecystokinin.

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Solution

The correct option is D The low pH of the stomach is essential in order for carbohydrate digestive enzymes to function.
The saliva contains an enzyme called salivary amylase which initiates breaking down of starch into maltose. The complete digestion of carbohydrate occurs in small intestine by pancreatic amylase. The activity of both of these enzymes is affected by pH. Salivary amylase requires pH of 6.5 to 7 to function while the enzymes in small intestines require pH around 7.5 for functioning well.
So, option D is the correct answer.

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Similar questions

Q.
Digestive enzymes are released by pancreas and bile is released by liver in response to the hormone :-

Q. Read the following passage carefully and answer the questions that follow it. Bile juice is stored in a sac called, gallbladder, located near its organ of secretion, the liver. The gallbladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas.

(a) Which organ secretes the bile juice?
(b) Why is digestion of fats difficult as compared to that of other nutrients?
(c) How does bile juice help in the digestion of fat?
(d) Where is the digestion of fat completed?
(e) Does bile juice digest fat completely?

Question 27
Read the following passage carefully and answer the questions that follows it.

Bile juice is stored in a sac called the gall bladder, located near its organ of secretion that is the liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released by the pancreas.

(a) Which organ secretes the bile juice?

(b) Why is digestion of fats difficult as compared to that of other nutrients?

(d) Where is the digestion of fat completed?

(e) Does bile juice digest fat completely?

1. Why are protein digesting enzymes in the stomach release as inactive enzyme or zymogens

2. Which enzyme is responsible for digestion of protein what kind of PH do you think this enzyme needs? how does the stomach maintained is pH? What is another advantage of having such a PH?

3. Enzymes are catalyst true or false justify your answer.

4. The stomach is wired to the Brain via the parasympathetic nervous system. Why do you believe is it essential for the brain to communicate with the stomach even though digestion is mostly an involuntary process?

5.Which part of the large intestine stores feces?

Q. In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas

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