Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology digestive system of human digestive glands liver pancreas

In human beings, sphincter of oddi is situated in 

  1. Common bile duct

  2. Ampulla of vater

  3. Main pancreatic duct

  4. Common hepatic duct
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sphincter of Oddi, abbreviated as SO, is a muscular valve that controls the flow of digestive juices through the ampulla of Vater into the second part of the duodenum. The sphincter of Oddi is relaxed by the hormone cholecystokinin via vasoactive intestinal peptide. 

So, the correct option is 'Ampulla of Vater'.

Multiple choice biology digestive system of human digestive glands liver pancreas

Stool of a person contain whitish grey colour due to malfunction of which type of organ : -

  1. Pancrease

  2. Spleen

  3. Kidney

  4. Liver
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Bilirubin is broken down to urobilinogen and stereobilinogen. The yellowish-brown colour of stool is due to the stereobilinogen. Due to the malfunctioning of the liver, insufficient production of stereobilinogen leads to white stool.

So, the correct answer is 'Liver'.
Multiple choice biology digestive system of human digestive glands liver pancreas

The pancreas produces?

  1. Three digestive enzymes and one hormone

  2. Three types of digestive enzymes and two hormones

  3. Two digestive enzymes and one hormone

  4. Only digestive enzyme and no hormone
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The pancreas produces majorly three types of digestive enzymes:
  • Proteases: to digest proteins.
  • Lipase: to break down fats.
  • Amylase: for the digestion of carbohydrates.

 The pancreas maintains the body’s blood glucose (sugar) balance. Primary hormones of the pancreas include insulin and glucagon, and both regulate blood glucose.
  • Insulin: This hormone regulates blood glucose by allowing many of your body’s cells to absorb and use glucose. In turn, this drops blood glucose levels.
  • Glucagon: Glucagon helps insulin maintain normal blood glucose by working in the opposite way of insulin. It stimulates your cells to release glucose, and this raises your blood glucose levels.

So, the correct answer is 'Three types of digestive enzymes and two hormones'.

Multiple choice biology digestive system of human digestive glands liver pancreas

Kupffer's cells of liver are an example of ________________.

  1. Anatomical barrier

  2. Inflammatory barrier

  3. Physiological barrier

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

Kupffer cells are also known as stellate macrophages (star-shaped) located in the liver, lining the walls of the sinusoids. They form part of the mononuclear phagocyte system. This means that they are a part of the first line of defense (inflammatory barrier) of the body and are involved in engulfing any invading pathogen (virus, bacteria, etc.) and destroy them.

So, the correct answer is 'Inflammatory barrier'. 

Multiple choice biology digestive system of human digestive glands liver pancreas

Simple absorbable forms are produced by secretions of all except

  1. Hepatocytes

  2. Enterocytes

  3. Parietal cells

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

Hepatocytes produce bile, which emulsifies fats but does not contain digestive enzymes that break down macromolecules into absorbable forms. Enterocytes, parietal cells, and oxyntic cells all contribute to the production of enzymes or acid that facilitate digestion.

Multiple choice biology digestive system of human digestive glands liver pancreas

Meat does not contain much glycogen because 

  1. It is stored only in liver

  2. Animals do not store much glycogen

  3. It is degraded by enzymes immediately after death

  4. Clinical death is not biological death
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Meat does not contains much of glycogen as all the excess glucose present in body is converted to glycogen and is stored in the liver.
Some of the glycogen is stored in muscle but is as less as $1-2\%$. Major portion, i.e., $100-120$gm of glycogen is stored in liver cells and are released and broken down when needed.
Multiple choice biology digestive system of human digestive glands liver pancreas

Bilirubin is the breakdown product of

  1. Haemoglobin

  2. RBC

  3. WBC

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

The dead RBCs are metabolised in the spleen and liver and the heme is broken down into bilirubin which is a yellow coloured pigment.

So, the correct option is 'Haemoglobin'.

Multiple choice biology digestive system of human digestive glands liver pancreas

Removal of the pancreas impairs the breakdown of 

  1. lipids and carbohydrates only

  2. lipids and proteins only

  3. lipids, proteins and carbohydrates

  4. proteins and carbohydrates only
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pancreas secretes pancreatic juice containing enzymes for all three major classes of nutrients: amylase for carbohydrates, lipases for lipids, and proteases (like trypsin) for proteins.

Multiple choice biology digestive system of human digestive glands liver pancreas

The function of the liver is to

  1. Promote digestion of food

  2. Promote respiration

  3. Store glucose as glucogen

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

The liver plays a central role in metabolism, including glycogenesis (storing glucose as glycogen), gluconeogenesis, and glycogenolysis to maintain blood glucose levels.

Multiple choice biology digestive system of human digestive glands liver pancreas

The cells which occupy only 5% of the islets are known as 

  1. Alpha cells

  2. Beta cells

  3. Gamma cells

  4. Both of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The islets of Langerhans are the cells in the pancreas. These cells are responsible for the endocrine functions of the pancreas. There are three type of cells, alpha cells, beta cells and gamma cells. The gamma cells are known delta cells. These cells comprise only 5% of the islets cells. These cells are responsible for the production of somatostatin hormone.

Thus, the correct answer is option C.