Tag: digestion and absorption

Quizzes (37) Questions (218)

Questions Related to digestion and absorption

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

The process of breaking down excess amino acids in the liver is known as

  1. Amination

  2. Denitrification

  3. Deamination

  4. Nitrification
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Deamination is the process by which amino acids are broken down if there is an excess of protein intake.  It is the removal of an amine group from a molecule in the presence of an enzyme called deaminase. It takes place in the liver. Hence the process of breaking down excess amino acids in the liver is known as Deamination. 

So, the correct answer is 'deamination'.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

The recently reported protein angiotensin is produced by

  1. Liver

  2. Kidney

  3. Pancreas

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

Angiotensin is a peptide hormone, that causes vasoconstriction and a subsequent increase in blood pressure. It is derived from the precursor molecule angiotensinogen, a serum globulin produced in the liver. It plays an important role in the renin-angiotensin system. 

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

The liver of carnivore is larger than the herbivore because in carnivores

  1. Their body is also big

  2. The diet contains much more proteins so liver has to do more work

  3. The problem of phagocytosis by Kupffer cells are more

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

Animal flesh is composed of the most highly complex type of protein and requires vast amounts of uric acid to process. Uric acid is released into the system in amounts necessary to break proteins down into amino acids. Uric acid is a toxic substance and must be flushed out by the liver. Hence the carnivore's liver is designed with the capacity to eliminate ten times as much uric acid as the liver of man or other plant eaters. 

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Which one of the following is specific function of the liver?

  1. Excretion

  2. Glycogenolysis

  3. Digestion

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

Glycogenolysis is the process by which glycogen stored in the liver and muscle cells of animals, is broken down into glucose to provide immediate energy and to maintain blood glucose levels during fasting. Glycogenolysis occurs in the liver and is stimulated by the hormones glucagon and epinephrine (adrenaline). It is the catabolic process where break down of glycogen occurs by the enzyme glycogen phosphorylase.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

The major site of protein breakdown to form free amino acids is in the

  1. Kidney

  2. Spleen

  3. Intestine

  4. Bone marrow
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kidner functions as a blood filtration tool which separates waste from the blood. The spleen is the site where blood is filtered as a part of immune system, also recycling of old blood cells are done here. Bone marrow is the site where there is the formation of new blood cells. The intestine is the only place where the protein in ingested food is broken down into simple forms after the partial breakdown in the stomach. So major proteinaceous food is broken down into free amino acids in the intestine. 

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Stool of a person contains whitish grey colour due to
malfunction of

  1. Liver

  2. Spleen

  3. Kidney

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

The colour of the stool is determined by the liver. The liver imparts a brown colour to the stool by releasing bile juices which is the normal case. In the case of the colour change of stool. it means that the liver is not functioning properly. For example. the stool is whitish grey in colour when the liver produces less bile juice or the flow of bile from the liver is blocked.

So, the correct option is 'Liver'.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Excess carbohydrates are

  1. Stored in the body

  2. Changed through lipogenesis

  3. Aminated

  4. Passed out in stool
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When carbohydrate intake exceeds energy needs, the liver converts excess glucose into fatty acids through a process called lipogenesis, which are then stored as triglycerides.