Tag: phagocytosis

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Questions Related to phagocytosis

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Which of the following cells does not exhibit phagocytic activity?

  1. Monocytes

  2. Neutrophil

  3. Basophil

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

Phagocytes have the ability to phagocytose or kill foreign cells and particles like pathogens by ingesting them. Many blood cells have this function, including monocytes, neutrophils and macrophages. Basophils do not have phagocytic activity.

Thus, the correct answer is 'Basophil.'

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Collecting of WBCs at the site of injury occurs due to

  1. Phagocytotis

  2. Hemolysis

  3. Diapedesis

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Phagocytosis is a process of cell eating in which a cell engulfs a particle and digests it.
B. Hemolysis is a process of rupture of red blood cells which release their contents into the blood plasma or any other surrounding fluid.
C. Diapedesis is the process of passage of WBCs or leucocytes from the capillaries towards the site of injury.
So, the correct answer is 'Diapedesis'.
Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Which of these are phagocytic in nature

  1. Neutrophil, monocyte and basophil

  2. Neutrophil, monocyte and macrophage

  3. Neutrophil, basophil and macrophage

  4. Acidophil, basophil and lymphocyte
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among the White blood cells (WBCs) four cells have the phagocytic ability. The neutrophils, monocytes, eosionophils and basophils. The basophils and the eosinophils have very less phagocytic ability when compared to the phagocytic ability of neutrophils and monocytes. When monocytes leave the blood and enter tissue spaces they grow and modify to form macrophages which still have the phagocytic ability. Thus, the correct option is B.

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Heparin present normally in blood is formed by

  1. Granulocytes

  2. Clumped platelets

  3. Mast cell granules

  4. Monocytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Mast cells are a type of white blood cells (WBCs) or leucocytes and contain many granules. Their granules are rich in heparin and histamine. They are formed from myeloid stem cells which are part of immune system. These cells release heparin which is an anticoagulant and prevents the clotting of blood in blood vessels by inactivating the clotting factors. Heparin is also released from basophils which are an another type of white blood cells.
So, the correct answer is 'Mast cell granules'.
Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

What is the name given to a large amoeboid cell that engulfs and destroys bacteria invading the human body?

  1. Elastocyte

  2. Mast cell

  3. Macrophage

  4. T-cell
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A macrophage is a type of phagocyte, which is a cell responsible for detecting, engulfing and destroying pathogens and apoptotic cells. Macrophages are produced through the differentiation of monocytes, which turn into macrophages when they leave the blood. Macrophages also play a role in alerting the immune system to the presence of invaders. Phagocytosis is the term used to describe the engulfing and destroying of defective or microbial cells. When inflammation occurs, monocytes undergo a series of changes to become macrophages and target cells that need eliminating. Once engulfed, cellular enzymes inside the macrophage destroy the ingested particle. Some macrophages act as scavengers, removing dead or necrotic cells while others provide host immunity by engulfing microbes.

So the correct option is 'macrophage'.

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Antibodies are produced by

  1. Lymph nodes

  2. B lymphocytes

  3. Spleen

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

An antibody also known as an immunoglobulin (Ig) is a large, Y-shaped protein molecule produced by B lymphocytes, that is used by the immune system to identify and neutralize pathogens (antigens) such as bacteria and viruses.

Therefore, the correct answer is option B.

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

Phagocytosis

  1. Is carried by cells of the adaptive immune system

  2. Is restricted to macrophages

  3. Is important in bacterial infections

  4. Is a process that does not involve energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phagocytosis is a process by which certain living cells called phagocytes ingest or engulf other cells or particles It is normally important in bacterial infections.

So, the correct option is 'is important in bacterial infections'

Multiple choice biology immunity phagocytosis cells in immune system immune system, its cells, mediators and antigens

The blood cells which destroy disease causing germs are

  1. RBCs

  2. WBCs

  3. Platelets

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

The cells involved in the immune system are white blood cells, or leukocytes, which destroy disease-causing organisms or substances. The two types of leukocytes are phagocytes and lymphocytes. The most common type of phagocyte is the neutrophil, which primarily fights bacteria. The two kinds of lymphocytes are B lymphocytes and T lymphocytes. Lymphocytes form in the bone marrow and either stay there and mature into B cells, or they leave for the thymus gland, where they mature into T cells.