Question
How do carbohydrates, proteins and fats get digested in human beings?

Answer

Digestion of carbohydrates: Digestion of carbohydrates begins from buccal cavity. Salivary amylase converts starch into sugar. Other complex carbohydrates are converted into glucose in the small intestine.
Digestion of Proteins: Protein is partially digested in the stomach. For this, stomach secretes the enzyme pepsin. In small intestine, pancreatic juice provides the enzymes trypsin and chymotrypsin. These enzymes complete the digestion of proteins.
Digestion of Fats: Digestion of fats takes place in small intestine. Bile; from liver; emulsifies the fat. Due to this, fat is broken into small globules. This makes it easier for the enzyme to digest fat. Lipase is the enzyme which converts fat into glycerol and fatty acid.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

  1. In tabular form, differentiate between ethanol and ethanol acid under the following heads:
  1. Physical state.
  2. Taste.
  3. $NaHCO_3$ test.
  4. Ester test.
  1. Write a chemical reaction to show dehydration of ethanol.
  1. Write the function of each of the following parts of human eye:
CORNEA; IRIS; CRYSTALLINE LENS; CILIARY MUSCLES.
  1. Millions of people of the developing countries of world are suffering from corneal blindness. These persons can be cured by replacing the defective cornea with the cornea of a donated eye. A charitable society of your city has organised a campaign in your neighbourhood in order to create awareness about this fact. If you are asked to participate in this mission how would you contribute in this noble cause?
  1. State the objective of organising such campaigns.
  2. List two arguments which you would give to motivate the people to donate their eyes after death.
  3. List two values which are developed in the persons who actively participate and contribute in such programmes.
An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.
  1. Identify the element X. How many valence electrons does it have?
  2. Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?
  3. Draw the electron dot structure for ammonia and what type of bond is formed in it?
Given below is a labelled diagram of the human brain.

Image

Using the given diagram, answer the following questions:
i. Which part of the brain controls reflex movements of the head, neck, and trunk?
ii. Name the part of the human brain which contains a vital centre for controlling blood pressure.
iii. Which part of the hindbrain regulates respiration?
iv. How is the brain protected from injuries and shock?
v. Which part of the human brain is the main thinking region?
Describe the process of urine formation in kidneys.
Why detergents are better cleansing agents than soaps? Explain.
a) Rehmat classified the reaction between Methane and Chlorine in presence of sunlight as a substitution reaction. Support Rehmat's view with suitable justification and illustrate the reaction with the help of a balanced chemical equation.
b) Chlorine gas was prepared using electrolysis of brine solution. Write the chemical equation to represent the change. Identify the other products formed in the process and give one application of each.
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
  1. Name the device X.
  2. What is the source of energy which cooks food in this device?
  3. What is the name of the process which traps energy in this device?
  4. State one advantage (other than saving on fuel) or using such a device for cooking food.
Explain the phenomenon of electromagnetic induction. Describe an experiment to show that a current is set up in a closed loop when an external magnetic field passing through the loop increases or decreases.
Give reasons why a woman should avoid frequent pregnancies. Explain the following methods of contraception giving one example of each.
  1. Barrier method.
  2. Chemical method.