Answer
Verified
400.2k+ views
Hint: It is a scale to measure the number of hydrogen ions present in a solution and helps to detect whether a solution is acidic or basic.
Complete answer:
Gastric juice or stomach acid is a digestive fluid formed within the stomach lining. It is acidic because the protein-digesting enzymes of the stomach such as pepsin do not work well in the basic medium so the pH is maintained between 1.5 – 3.5 in the stomach. So, the pH is normally around 2.
Additional information
> Gastric juice composed of hydrochloric acid, potassium chloride, and sodium chloride.
> It helps in the digestion of proteins by activating digestive enzymes, which breaks the long chains of amino acids of proteins.
> Gastric juice is secreted by the oxyntic or parietal cells of the stomach.
> Gastric acid is regulated by both the autonomous nervous system and several hormones.
> The parasympathetic nervous system, via the vagus nerve, and the hormone gastrin stimulate the parietal cell to produce gastric acid.
> The production of gastric acid in the stomach is tightly regulated by positive regulators and negative feedback mechanisms.
So, the correct answer is 2.
Note: The role of gastric acid in the digestion was established in the 1820s and 1830s by William Beaumont on Alexis St. Martin, who as a result of an accident, had a hole in his stomach, which allowed Beaumont to observe the process of digestion and to extract gastric acid, verifying that acid played a crucial role in digestion.
Complete answer:
Gastric juice or stomach acid is a digestive fluid formed within the stomach lining. It is acidic because the protein-digesting enzymes of the stomach such as pepsin do not work well in the basic medium so the pH is maintained between 1.5 – 3.5 in the stomach. So, the pH is normally around 2.
Additional information
> Gastric juice composed of hydrochloric acid, potassium chloride, and sodium chloride.
> It helps in the digestion of proteins by activating digestive enzymes, which breaks the long chains of amino acids of proteins.
> Gastric juice is secreted by the oxyntic or parietal cells of the stomach.
> Gastric acid is regulated by both the autonomous nervous system and several hormones.
> The parasympathetic nervous system, via the vagus nerve, and the hormone gastrin stimulate the parietal cell to produce gastric acid.
> The production of gastric acid in the stomach is tightly regulated by positive regulators and negative feedback mechanisms.
So, the correct answer is 2.
Note: The role of gastric acid in the digestion was established in the 1820s and 1830s by William Beaumont on Alexis St. Martin, who as a result of an accident, had a hole in his stomach, which allowed Beaumont to observe the process of digestion and to extract gastric acid, verifying that acid played a crucial role in digestion.
Recently Updated Pages
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
The branch of science which deals with nature and natural class 10 physics CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Define absolute refractive index of a medium
Which of the following would not be a valid reason class 11 biology CBSE
What are the measures one has to take to prevent contracting class 12 biology CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
How do you solve x2 11x + 28 0 using the quadratic class 10 maths CBSE
Select the correct plural noun from the given singular class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
The sum of three consecutive multiples of 11 is 363 class 7 maths CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
How many squares are there in a chess board A 1296 class 11 maths CBSE