Tag: liver

Questions Related to liver

Twenty-four hours after removing the liver of a mammal the concentrations of urea & amino acids in the blood would be changed in which of the following ways?

biology digestion and absorption liver functions of the liver secretory organs

  1. Both urea & amino acid levels would have risen

  2. There would be no change in the level of either

  3. The amino acid level would have risen while the urea level would be fallen

  4. The urea level would have risen while the amino acid

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Correct Option: A

Which of the following blood proteins (clotting factors) are produced by liver?

biology digestion and absorption liver functions of the liver secretory organs

  1. Thrombin and prothrombin

  2. Anti hemophilic and fibrinogen

  3. Prothrombin and Fibrinogen

  4. Thromboplastin and thrombin

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Correct Option: A

Liver excretes?

biology digestion and absorption liver functions of the liver secretory organs

  1. Urea

  2. Uric acid

  3. Bile pigments

  4. Albumin

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Correct Option: A

How many statement are false with respect liver :-

biology digestion and absorption liver functions of the liver secretory organs

  1. Stores vitamin $B _{12}$

  2. Change $\beta$-carotene into vitamine A

  3. Haemopoitic organ in adult

  4. Deamination of amino acid is not mainly done by liver

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Correct Option: A

Which one of the following statements about glycogen is correct?

biology digestion and absorption liver functions of the liver secretory organs

  1. It is a disaccharides stored in liver which can react with ammonia to form proteins

  2. It is synthesized in the liver and takes part in the formation of bile and lipase, besides being a source of energy

  3. It is a polysaccharide which is synthesized and stored in liver cells

  4. It is synthesized in blood and stored in liver and muscles to provide glucose in tomes of need

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Correct Option: A

Lactic acid is converted into glycogen most readily in

biology digestion and absorption liver functions of the liver secretory organs

  1. Muscles

  2. Liver

  3. Kidney

  4. Brain

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Correct Option: B
Explanation:

Instead of accumulating inside the muscle cells, lactate produced by anaerobic fermentation is taken up by the liver. This initiates the Cori cycle. In the liver, gluconeogenesis occurs, which reverses both glycolysis and fermentation by converting lactate first into pyruvate, and finally back to glucose. The glucose is then supplied to the muscles through the bloodstream. If muscle activity has stopped, the glucose is used to replenish the supplies of glycogen through glycogenesis.

.......... is the largest gland in the body.

biology digestion and absorption liver functions of the liver secretory organs

  1. Spleen

  2. Thymus

  3. Liver

  4. Pancreas

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Correct Option: C
Explanation:

Liver is the largest gland in the body. It is a digestive gland present at the left half of the digestive system besides stomach. It synthesises bile, which emulsify (breaking into small droplets) fats and increase the surface area for the action of lipase enzyme.

Therefore, the correct answer is option C.

The end products of fat metabolism are excreted by 

biology digestion and absorption liver functions of the liver secretory organs

  1. Lung

  2. Skin

  3. Kidneys

  4. Liver

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Correct Option: D
Explanation:

The fat in the human diet is in the form of triglycerides. To use the fat as a source of energy for the body it needs to be broken down - a process referred to as fat metabolism.  This metabolism which takes place primarily in the liver gives out cholesterol and phospholipids. These are made available to the rest of the body along with lipoproteins and the rest are excreted out through bile. Thus, the correct answer is option D.

The food stored in the liver is in the form of

biology digestion and absorption liver functions of the liver secretory organs

  1. Albumen

  2. Glucose

  3. Glycogen

  4. Amino acids

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Correct Option: C
Explanation:

Once glucose is inside the liver, glucose is phosphorylated into glucose-6-phosphate, or G6P. G6P is further metabolized into triglycerides, fatty acids, glycogen or energy. Glycogen is the form in which the body stores glucose. The liver can only store about 100 g of glucose in the form of glycogen. 

If a person is kept on food with almost no carbohydrates, the first stored source of energy provided by the body is 

biology digestion and absorption liver functions of the liver secretory organs

  1. Proteins

  2. Fats

  3. Glycogen

  4. Salts

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Correct Option: C
Explanation:

The glucose stored in the liver serves as a buffer for blood glucose levels. Therefore, if the blood glucose levels start to get low because person has not consumed food for a period of time, the liver is able to release glucose into the bloodstream to maintain healthy levels. If the body reserves of glucose deplete, a process called gluconeogenesis will take place. During gluconeogenesis, glucose is synthesized from molecules that are not carbohydrates.