Test: Blood & Lymph

10 Questions MCQ Test Biology Class 11 | Test: Blood & Lymph

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 Find out the wrong match:


Monocytes are phagocytic cells which destroy foreign organisms entering the body .There is no such information that it secretes Heparin.

  • Heparin is a naturally occurring anticoagulant produced by basophils and mast cells. In therapeutic doses, it acts as an anticoagulant, preventing the formation of clots and extension of existing clots within the blood.
  • Allergic reactions may generally be divided into two components; the early phase reaction, and the late phase reaction. Typically, the infiltrating cells observed in allergic reactions contain a high proportion of lymphocytes, and especially, of eosinophils.
  • Basophils are a type of white blood cell. They produce histamine and serotonin that induce inflammation and heparin that prevents blood clotting, although there are less than that found in mast cell granules.
  • Neutrophils are phagocytes, capable of ingesting microorganisms or particles.

Hence option C, turns to be incorrect statement among the following.


The important function of lymph is to:


Lymph is the fluid present in lymphatic system. Its main function is to return interstitial fluid back to the blood. Interstitial fluid is also called extracellular fluid, which is formed from blood due to various factor such as hydrostatic pressure, osmotic gradients, etc.


After birth, Erythropoiesis starts in:

  • Erythropoiesis is derived from the Greek words erythron means “red” and poiesis means “to make”.
  • The process of producing red blood cells or erythrocytes is known as erythropoiesis.
  • A particular hormone known as erythropoietin secreted by kidneys stimulates the red blood cell precursors.
  • It helps in the activation process of production of red blood cells in hematopoietic tissues present in the red bone marrow.

Which of the following is not a main function of lymph glands?

  • The lymph node is an oval-shaped organ of the lymphatic system, which is widely distributed throughout the body.
  • The lymph fluid inside the lymph node contains lymphocytes, a type of WBCs, which continuously recirculates through the lymph nodes and the bloodstream.
  • In response to antigens, the lymphocytes in the lymph node make antibodies, which go out of the lymph node into circulation, seek and target pathogens. They also destroy bacteria.

Lymph node is not involved in the formation of RBC. Thus, the correct answer is option (B): 'Forming RBC'.


Which one of the following is correct?

  • Blood has four main components: plasma, red blood cells, white blood cells, and platelets.
  • Blood has many different functions, including transporting oxygen and nutrients to the lungs and tissues forming blood clots to prevent excess blood loss.


Which of the following engulfs pathogens rapidly?

  • Acidophils and basophils are not phagocytic in nature.
  • Monocytes are also phagocytes but take 7-8 hours to reach at the site of injury.
  • Neutrophils, are the most abundant type of white blood cells and form an integral part of the immune system.
  • These phagocytes are normally found in the blood stream. However, during the acute phase of inflammation, particularly as a result of bacterial infection, neutrophils leave the vasculature and migrate toward the site of inflammation in a process called chemotaxis.
  • They are the predominant cells in pus, accounting for its whitish/yellowish appearance.
  • Neutrophils react within an hour of tissue injury and are the hallmark of acute inflammation.

Hence, the correct answer is option (D): Neutrophils 


 Which of the following is a non-granulocyte?

  • Basophils are granulocytes, i.e., they contain large cytoplasmic granules in the cell nucleus and it stores histamine (a vasodilator), a chemical, which is secreted by the cells. When stimulated, it promotes blood flow to tissues.
  • Monocytes are a type of WBCs. Monocytes mature in different types of macrophages at different locations.
  • Acidophils are more commonly called as eosinophils. They are granulocytes that develop during hematopoiesis in the bone marrow.
  • Neutrophils are the most abundant type of WBCs. They are granulocytes which are phagocytic in nature and are able to engulf foreign substances (like bacteria).

Thus, the correct answer is option B.


Antigens are present:

  • Basically antigens are present on the cell surface.
  • Your immune system “sees” foreign invaders, like viruses, by looking at antigens produced from the proteins in those viruses.

Rh factor is present in

  • Rh factor, or ‘Rhesus factor’, is a group of antigens that determine the blood group of human beings is Rh-positive or Rh-negative. If a person’s blood group is O +ve, the person has no A or B antigens and Rh factors on the RBCs.
  • The factor was discovered first when Landsteiner and Weiner immunized a rabbit with blood in Rhesus macaques, hence the name.
  • The antibodies are known as anti-Rh.
  • These factors have been discovered only in humans and Rhesus monkeys.


Mark the odd one:


Erythrocytes because its stands for RBC's whereas others are different types of WBC's

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