Tag: ingestion of food

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

Digestion is the breaking down of large food molecules into
smaller ones. The main purpose of this is to

  1. Make the food soluble

  2. Enable the digestive enzymes to be used up

  3. Provide many different types of molecules for absorption

  4. Make the Passage of food along the gut easier

  5. Make the food insoluble
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Most of our foods are complicated chemical structure.
In order to be absorbed and utilized by the body, they
must be broken down into relatively simple molecules.
The process by which the complex food materials are
changed to simple molecules is called digestion.

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


Air or food is prevented from going into the trachea during swallowing by the

  1. larynx

  2. epiglottis

  3. pharynx

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

Epiglottis stands open during breathing, allowing air into the larynx. During swallowing it closes to prevent aspiration, forcing the swallowed liquids or food to go into the esophagus instead. It is thus the structure that diverts passage air into  the trachea and food into the esophagus

So, the correct answer is 'epiglottis'

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

Food and air pathway are divided at

  1. Larynx

  2. Pharynx

  3. Oesophagus

  4. Stomach
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air. At the bottom of the pharynx, this pathway divides in two, one for food (the oesophagus, which leads to the stomach) and the other for air.
So, the correct option is 'Pharynx'.
Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Succus entericus acts in?

  1. Alkaline medium

  2. Strongly acidic medium

  3. Neutral medium

  4. Weakly acidic medium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Succus entericus, or intestinal juice, contains enzymes that function optimally in an alkaline environment, which is maintained by secretions from Brunner's glands and the pancreas.

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

For how much time an average meal stays in a fish-hook stomach?

  1. 6---8 hrs

  2. 3----4 hrs

  3. 1---2 hrs

  4. 8---10 hrs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Variables considered with feeding rate and gastric evacuation time includes temperature, season, activity, body size, gut capacity, satiety, and metabolic rate. 
  • Gastric emptying rate declines more or less exponentially with time. Larger meals first are digested at a faster rate than small meals and the amount of pepsin and acid produced was somewhat proportional to the degree of distension of the stomach.
  •  Stomach mobility often increases with the degree of stomach distension also. Gastric emptying time is approximately 3 - 4 hours.
Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

The swallowing of food from buccopharyngeal cavity to stomach is called 

  1. Deglutition

  2. Mastication

  3. Peristalsis

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Deglutition is the medical term for the act of swallowing, which involves the movement of food from the mouth through the pharynx and esophagus to the stomach.

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

What are called micelles during absorption

  1. Small glycerol molecules

  2. Small droplets of fatty acids

  3. Very small fat droplets

  4. Large fat molecules
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micelles are small spherical aggregates formed by bile salts and fatty acids/monoglycerides, which facilitate the transport of lipids to the intestinal absorptive cells.

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

The secretion of brush border cells of intestinal mucosa along with secretion of goblet cells constitute

  1. Succus entericus

  2. Chyme

  3. Gastric juice

  4. Chylomicrons

  5. Bolus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Succus entericus is the collective term for the secretions of the intestinal glands (brush border cells) and goblet cells in the small intestine.