Biology
Human Immunity and Blood
2,051 Questions
Human immunity and blood questions cover the physiological mechanisms protecting the body against diseases and the components of blood. Topics include blood groups, cell mediated immunity, monoclonal antibodies, and blood coagulation. These biology topics frequently appear in general science sections of competitive exams.
Blood groupsCell mediated immunityMonoclonal antibodiesBlood coagulationCancer immunology
Human Immunity and Blood Questions
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Mast cells
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Neutrophils
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Eosinophils
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Macrophages
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Langerhans' cells
B
Correct answer
Explanation
Arthus reaction is a type III immune complex-mediated hypersensitivity.
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Humoral immune system
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Antibody
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Antigen
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Cell mediated immune system
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Infection
C
Correct answer
Explanation
Antigen is a foreign material triggers antibody formation. They are proteins or polysaccharides.
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4000 molecules/second
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4500 molecules/second
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3000 molecules/second
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2000 molecules/second
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1000 molecules/second
D
Correct answer
Explanation
The rate of production of anti-bodies by B-cells is 2000 molecules / second.
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interferons
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antihistamines
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lysozyme
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immunosuppressants
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lymphocytes
B
Correct answer
Explanation
Chemicals, which control allergic reactions are Antihistamines.
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Stem cells
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Complement system
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Suppressor cells
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Tears
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Saliva
C
Correct answer
Explanation
Suppressor cells prevents immune system from attacking body's own cells.
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Brutons Disease
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Leukocyte Adhesion deficency
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Di George Syndrome
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Severe combined immunodeficency
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Agammaglobulinemia
B
Correct answer
Explanation
Leukocyte Adhesion deficency is a myeloid lineage defect.
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RBC
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ATP
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Granuloctes
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Platelets
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Agranulocytes
B
Correct answer
Explanation
Adenosine triphosphate. It is not a kind of blood cell, it is a form of energy.
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dialysis
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phagocytosis
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diapedesis
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diffusion
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active transport
C
Correct answer
Explanation
The process in which the WBCs squeeze through the walls of the capillaries into the tissue is diapedesis.
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neutrophils and basophils
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basophils and eosinophils
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lymphocytes and basophils
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monocytes and eocinophils
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lymphocytes and monocytes
E
Correct answer
Explanation
Lymphocytes and Monocytes are agranulocytes.
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Albumin
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Heparin
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Fibrinogen
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Globulin
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Fibrin
B
Correct answer
Explanation
Heparin also known as unfractionated heparin, a highly sulfated glycosaminoglycan is widely used as an injectable anticoagulant and has the highest negative charge density of any known biological molecule. It can also be used to form an inner anticoagulant surface on various experimental, and medical devices such as test tubes and renal dialysis machines.
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RBCs are of several kinds whereas WBCs are of one kind.
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Leukocytes show amoeboid movement.
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WBC contains hemoglobin.
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The walls of auricles are thicker than that of ventricles.
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The average life of RBCs in our body is about 120 hours.
B
Correct answer
Explanation
This statement is correct.
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In the RBC
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In the plasma
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In the skin
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In the blood vessel
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In the nucleus of each cell
B
Correct answer
Explanation
Yes, it is the correct answer. Haemoglobin is present in plasma as RBCs are absent.
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WBC
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RBC
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plasma
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platelets
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pus cells
B
Correct answer
Explanation
Haemoglobin is found in RBC’s only. They carry iron content in them.
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RBC
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platelets
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plasma
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WBC
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lymph
D
Correct answer
Explanation
The human body is protected from invading bacteria by the WBC. They play a major role in the body defense mechanism.
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lymph
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clot
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serum
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platelet
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whole plasma
C
Correct answer
Explanation
The blood plasma from which fibrinogen has been removed is called serum.