Tag: biology

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Multiple choice biology digestive system of human digestive glands liver pancreas

Acini cells are

  1. Endocrine

  2. Exocrine

  3. Both endocrine and exocrine

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

There are two types of cells in the pancreas, the acinar cells and the islet of Langerhans. The acinar cells are lobed cells. These cells are responsible for the exocrine function of the pancreas. They secrete the pancreatic enzymes and forms the pancreatic juice which is involved in the process of digestion.

Thus, the correct answer is option B. 

Multiple choice biology digestive system of human digestive glands liver pancreas

Pancreas are derived from 

  1. Ectoderm

  2. Endoderm

  3. Mesoderm

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In organogenesis, cells of the three germ layers lead to the formation of specific structures. The ectoderm eventually forms the outer layer of the skin and gives rise to the nervous system and sense organs. Tissues that eventually line the digestive tract and organs like liver, pancreas and lungs are all of endodermal origin. Skeletal tissue, muscle, and the circulatory, excretory, and reproductive systems are derived from mesoderm.

Thus, the correct answer is option B.

Multiple choice biology digestive system of human digestive glands liver pancreas

Which of the following data can be related to pancreas?

  1. It is 3 to 9 cm in breadth

  2. It is 10-23 cm in length

  3. It extends up to spleen in the abdominal cavity

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The pancreas is about 10-23 cm in length, 3-9 cm in breadth and 6 inches long and sits across the back of the abdomen, behind the stomach. It extends laterally and superiorly across the abdomen from the curve of the duodenum to the spleen. It is considered as heterocrine gland.
So, the correct answer is option D.
Multiple choice biology digestive system of human digestive glands liver pancreas

Pancreas has double role of

  1. Storage and digestion

  2. Digestion and absorption

  3. Digestion and endocrine activity

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

The pancreas is a heterocrine gland; it functions as an exocrine gland by secreting digestive enzymes into the duodenum and as an endocrine gland by secreting hormones like insulin and glucagon into the blood.

Multiple choice biology digestive system of human digestive glands liver pancreas

$\beta$ cells in the islet of Langerhans of man comprise.

  1. $60\%$ to $90\%$
  2. $40\%$ to $50\%$
  3. Less than $40\%$

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

In the human pancreas, beta cells are the most abundant cell type within the islets of Langerhans, typically comprising about 60 to 80 percent of the islet cells.

Multiple choice biology digestive system of human digestive glands liver pancreas

Assertion  :    In alcoholic drink, the alcohol is converted
                         into glucose in the liver.

Reason  :      Liver cells are able to produce glucose from
                       alcohol by back fermentation.


  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In liver, alcohol is oxidised into acetaldehyde which is further oxidised into acetate. The latter is converted to acetyl coenzyme A which is used in Krebs' cycle. Ethyl alcohol $\rightarrow $ Acetaldehyde $\rightarrow $  Acetate $\rightarrow $ Acetyl Co A $\rightarrow $ $CO _{2}+H _{2}O$




Multiple choice biology digestive system of human digestive glands liver pancreas

Human liver has.

  1. $1000$ lobules
  2. $10000$ lobules

  3. About one million lobules

  4. No lobules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The human liver is composed of a vast number of functional units called hepatic lobules, estimated to be around one million in an adult liver.

Multiple choice biology digestive system of human digestive glands liver pancreas

Liver performs the function of

  1. Glycogenesis

  2. Glycogenolysis

  3. Deammination

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The liver performs all these functions: glycogenesis (glucose to glycogen), glycogenolysis (glycogen to glucose), and deamination (removal of amino groups from amino acids).

Multiple choice biology digestive system of human digestive glands liver pancreas

The endocrine part of the pancreas is known as.

  1. Crypts of Lieberkuhn

  2. Islets of Langerhans

  3. Peyer's patches

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

The Islets of Langerhans are the clusters of endocrine cells scattered throughout the pancreas that secrete hormones like insulin and glucagon.