Tag: mechanism of digestion

Quizzes (0) Questions (39)

Questions Related to mechanism of digestion

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

One of the following movements is not completely involuntary. It is

  1. Peristalsis

  2. Systole of ventricles

  3. Dilation of eye pupil

  4. Deglutition
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Deglutition (swallowing) is a complex process that begins as a voluntary action in the mouth before becoming an involuntary reflex in the pharynx and esophagus.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Alexis St. Martin is famous for

  1. His views on evolution

  2. Work on animal breeding

  3. Open stomach for experiments on digestion

  4. Being first person to study digestion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Alexis St. Martin was a Canadian voyageur known for his part in the study of digestion in humans.
  • St. Martin was shot with a musket at close range and had a near-fatal accident in 1822.
  • He was treated by an American Army physician William Beaumont.
  • His wound was not healed fully and also left an opening into his stomach.
  • Studies were conducted on St. Martin's stomach which led to helped to understand the structure of the stomach, different types of gastric juices and the processes of digestion and other activities in the stomach.
  • So, the correct answer is 'Open stomach for experiments on digestion'.
Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

The scientist to study digestion for the first time was

  1. Beaumount

  2. Pavlov

  3. Guillemin

  4. Sach
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Beaumont recognized that he had in St. Martin an unusual opportunity to observe digestive processes. Dr. Beaumont began to perform experiments on digestion for the first time using the stomach of St. Martin. He is known as father of gastric physiology.

So, the correct option is 'William Beaumont'.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Read the following statements and select the correct option.
Statement 1 : Deglutition starts as a reflex and then continues by voluntary action.
Statement 2 : Oesophagus has smooth muscles in the beginning and striated muscles In the rest of its wall.

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct answer is (d).

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

  1. Epiglottis

  2. Diaphragm

  3. Neck

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The epiglottis is a flap of cartilage that covers the glottis during swallowing to prevent food from entering the trachea; failure of this mechanism leads to coughing.

Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion

Ammonia formed during digestion is processed in

  1. Liver

  2. Small intestine

  3. Large intestine

  4. Stomach
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • During digestion, the deamination of amino acids results in the production of ammonia (NH3). 
  • However, the liver contains a system of carrier molecules and enzymes which quickly converts the ammonia (and carbon dioxide) into urea
  • This ammonia is an extremely toxic base and its accumulation in the body may cause death.  Hence,  Ammonia is formed during digestion in the liver.
So, the correct answer is 'liver'.
Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

Which of the options given below would not correctly fill the blanks in the following sentence?


In order to absorb and use ____ by the body, these must be broken down by hydrolysis into ___.

  1. Polysaccharides, Monosaccharides

  2. Amino acids, Proteins

  3. Fats, Glycerol and Fatty acids

  4. Disaccharldes, Monosaccharides
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Proteins are converted into dipeptides in the stomach which is followed by the conversion of dipeptides to amino acids in the small intestine. These amino acids are absorbed through the wall of the intestine as simple absorbable substances.
  • Hence In order to absorb and use Proteins by the body, these must be broken down by hydrolysis into proteins.
  • So, the correct answer is 'amino acids, proteins'.
Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

Which one of the following enzyme is absent in invertebrates?

  1. Pepsin

  2. Trypsin

  3. Lipase

  4. Amyalase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Protein in invertebrates is a breakdown by four different enzymes known as a proteinase, carboxypolypeptidase, aminopolypeptidase, and dipeptidase, which can be separated by adsorption but vertebrates have one extra enzyme trypsin is also found that helps in activation of the given four and digestion of protein.

So the correct option is 'Trypsin'.

Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

What is common among amylase, rennin and trypsin?

  1. These are produced in stomach
  2. These act at a pH lower than $7$

  3. These all are proteins

  4. These all are proteolytic enzymes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Amylase, rennin and trypsin are protein enzymes.

Amylase is enzymes that catalyse the hydrolysis of carbohydrates. Amylase is produced by the pancreas and salivary glands.
Rennin is an enzyme especially produced by stomach for digestion of milk proteins in infants. 
Trypsin is a proteolytic enzyme produced in the small intestine. 
So, the correct option is 'These all are proteins'.