Biology
Human Immunity and Blood
2,096 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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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.
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WBC production will be lowered.
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Removal of dead RBCs will not take place.
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Antibody production will be decreased.
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RBC production will be stopped.
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WBC production will be increased.
A
Correct answer
Explanation
It is because WBCs are produced in the spleen of a man.
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Dendritic cells
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Plasma cells
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Neutrophil polymorphonuclear leucocytes
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Erythrocytes
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Platelets
A
Correct answer
Explanation
Dendritic cells are a peculiar type of antigen-presenting cells.
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T lymphocytes
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Basophils
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Erythrocytes
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Epithelioid cells
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Giant cells
E
Correct answer
Explanation
Giant cells are the multinucleate cells formed by fusion of macrophages.
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Mast cells
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Eosinophils
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Basophils
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T lymphocytes
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Plasma cells
E
Correct answer
Explanation
Plasma cells produce immunoglobulins of all isotypes including IgE.
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Hepatocytes
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Lymphocytes
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Monocytes
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Erythrocytes
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Plasma cells
C
Correct answer
Explanation
They are circulating immature macrophages or dendritic cells.
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Tonsils
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Malt
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Spleen
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Lymph node
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Thymus
B
Correct answer
Explanation
The respiratory, alimentary and genitourinary tracts are guarded immunologically by subepithelial accumulations of lymphoid tissues.
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IL-5
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IL-10
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IFN-gamma
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IL-2
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IL-7
A
Correct answer
Explanation
Part of the pathway is involved in IgE production as well as in Th2 cellular responses.
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Neutrophils
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Follicular dendritic cells of lymph nodes
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Kupffer cells in liver
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Histiocytes in tissues
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Monocytes in blood
A
Correct answer
Explanation
These are of the myeloid lineage.
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Surface immunoglobulin
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Polyclonal activation by concanavalin A
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Measles virus receptor
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CD3
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Class I MHC
A
Correct answer
Explanation
A totally different gene set encodes the T cell receptor for antigen.