Leucocytes - class-XI
Description: leucocytes | |
Number of Questions: 48 | |
Created by: Tanuja Atwal | |
Tags: the circulatory system our body- its internal organ system transport in animals body fluids and circulation soldiers of defense evs biology |
Number of WBCs per $mm^3$ of human blood is ideally.
-
$8000$
-
$7000$
-
$6500$
-
$6000$
Number of leucocytes in decreasing order in human blood is?
-
Eosinophils $>$ basophils $>$ neutrophils
-
Neutrophils $>$ eosinophils $>$ basophils
-
Basophils $>$ eosinophils $>$ neutrophils
-
Eosinophils $>$ neutrophils $>$ basophils
Basophils: 0.5–1.0 percent. Eosinophils: 1–4 percent. Lymphocytes: 20–40 percent. Monocytes: 2–8 percent, Neutrophils: 40% to 60% Lymphocytes: 20% to 40%.
Find the correct descending order of percentage proportion of leucocytes in human blood.
-
Neutrophils --> Basophils --> Lymphocytes Acidophils (Eosinophils) -->Monocytes
-
Monocytes --> Neutrophils --> Lymphocytes --> Acidophils-->Basophils
-
Neutrophils --> Lymphocytes Monocytes --> Acidophils -->Basophils
-
Lymphocytes Acidophils --> Basophils --> Neutrophils-->Monocytes
The relative proportions of the different types of white blood cells are: Neutrophils (roughly 60 – 70%), Lymphocytes (roughly 20 – 30%), Monocytes (approximately 1 – 6%), Eosinophils (approximately 1 – 3%), Basophils (less than 1%).
Thus, the correct answer is 'Neutrophils --> Lymphocytes Monocytes --> Acidophils -->Basophils.'
Compounds released by WBCs, which raise the body's temperature, are known as
-
Insulin
-
Catecholamines
-
Pyrogens
-
Prostaglandins
Immunocomplexes are removed by
-
Basophils and monocytes
-
Basophils and eosinophils
-
Eosinophils and monocytes
-
Neutrophils and basophils
Immunocomplexes also called antigen-antibody complexes are harmful and long deposition of then inside the cell can lead to various autoimmune disorders and primarily removed from the cell by phagocytosis in which eosinophils and monocytes (destruction of antibody) have an important role to play.
In a blood sample, a WBC has a nucleus with drum-sticks. This indicates that the blood sample has come from a person who is
-
Heamphilic
-
Diabatic
-
Female
-
Sickle cell-anemic
Neutrophils are sexually dimorphic. Neutrophils from females exhibit a small additional X chromosome structure, known as a "neutrophil drumstick".
Which of the following cells are associated with immune system of body?
-
Platelets
-
WBC
-
Macrophages
-
RBC
Select the incorrect statement out of the following.
-
Neutrophils constitute the majority of leucocytes
-
Eosinophils resist infection.
-
Basophils secrete histamine and serotonin.
-
RBCs in mammals are enucleated and biconvex in shape.
Mark, among the following the a cell which does not exhibit pahgocytotic activity
-
Monocytes
-
Neutrophil
-
Basophil
-
Macrophage
Phagocytotic activity is the process of engulfing or ingestion of food or bacteria.
- Monocytes - They are the largest type of leucocytes present in about 10-20% in blood. They are phagocytotic in nature and engulf bacteria.
- Neutrophils - There are also many in number in leucocytes. They are phagocytotic in nature and thus engulf harmful bacteria and germs.
- Basophils - They are present in the very least amount in the leucocytes. Their main function is the prevention of blood clotting and other allergic reactions.
- Macrophages - They are formed from monocytes in the leucocytes. They are phagocytes that engulf and destroy all the bacteria.
So, the correct option is 'Basophil'.
The blood cells with polymorphic nucleus are?
-
Granulocytes
-
Thrombocytes
-
Erythrocytes
-
None of these
Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm. They are also called polymorphonuclear leukocytes or polymorphonuclear neutrophils because of the varying shapes of the nucleus, which is usually lobed into three segments. These are granulocytes involved in fighting off pathogens, such as bacteria and fungi.
Which of the following cell/organism does not form pseudopodia during its movement/locomotion?
-
WBC
-
Sperm
-
Macrophage
-
Amoeba
Find the correct descending order of percentage proportion of leucocytes in human blood.
-
Neutrophils $\rightarrow$ Basophils $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils (Eosinophil) $\rightarrow$ Monocytes
-
Monocytes $\rightarrow$ Neutrophils $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils
-
Neutrophils $\rightarrow$ Lymphocytes $\rightarrow$ Monocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils
-
Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils $\rightarrow$ Neutrophils $\rightarrow$ Monocytes
Decrease of number of leucocytes in blood is due to the deficiency of?
-
Cyanacobalamine
-
Folic acid
-
Ascrobic acid
-
Pyridoxine
Mast cells of connective tissue contain
-
Vasopressin and histamine
-
Heparin and histamine
-
Heparin and calcitonin
-
Serotonin and melanin
A mast cell is derived from the myeloid stem cell and contains many granules rich in histamine and heparin. Mast cells play an important role in allergy and anaphylaxis and are involved in wound healing and defence against pathogens. So, the correct answer is option B.
Which of the following statements are wrong ?
(a) Leucocytes disintegrate in the spleen and liver.
(b) RBC, WBC and blood platelets are produced by bone marrow.
(c) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(d) The important function of lymphocytes is to produce antibodies.
-
a and b only
-
a and d only
-
a and c only
-
b and c only
-
b and d only
Leucocytes do not disintegrate in spleen and liver, in fact they are produced in bone marrow.
Neutrophils are mainly responsible for protection against infection. When they come across the bacteria or any other foreign bodies, they engulf them through phagocytosis, thus playing a important role in cell defense.
Which statement is true for WBC?
-
Non-nucleted
-
In deficiency, cancer is caused
-
Can squeeze through blood capillaries
-
None of the above
WBC's are amoeboid in shape due to which they can easily squeeze through the walls of the capillaries at the site of injury by the process known as diapedesis and engulf the damaged cells by phagocytosis. They are nucleated cells and excess of WBCs causes cancer known as leukaemia.
Spleen and thymus are haematopoietic for
-
RBC
-
WBC
-
Platelets
-
All of the above
The main function of white blood cells is
-
To help red blood cells in the transportation of oxygen and carbon dioxide.
-
To clot the blood at the time of injuries.
-
To accelerate the production of red blood cells in the bone marrow.
-
To defend the body against infections.
White blood cells(WBCs) are the body's defense systems. They attack foreign bodies that invaded the blood or any part of the body. Foreign bodies like the bacteria, viruses and the fungi rendering them less invasive and even destroys them. They are cells involved in the “inflammatory” response. This response develops when tissue is damaged or invaded by microbes. Neutrophils specialize is killing bacteria. Eosinophils kill parasites. Monocytes control inflammation by releasing cytokines. Lymphocytes recognize and destroy cells infected by viruses or transplanted foreign cells.
Myoglobin is found in
-
White fibres
-
Red fibres
-
Can be traced in both
-
Cardiac muscles only
Myoglobin is found in red fibres.
The different types of the blood vessels seen in the body are
-
Three
-
Two
-
Four
-
Five
Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per ${mm}^{3}$ of human blood?
-
Eosinophils --> Basophils --> Neutrophils
-
Basophils --> Eosinophils --> Neutrophils
-
Neutrophils --> Eosinophils --> Basophils
-
Eosinophils --> Neutrophils --> Basophils
Percentage distribution of leukocyte are as follows:
Which blood cells of mammals are concerned with immunity?
-
Young Erythrocytes
-
Leucocytes
-
Thrombocytes
-
Matured Erythrocytes
Leucocytes or the white blood cells are concerned with immunity. They perform phagocytosis, antigen-presenting, the release of antibodies, release of cytokines, opsonization etc. to keep the immunity of the body against the pathogens. Erythrocytes or the red blood cells are responsible for the transportation of oxygen. Thrombocytes or the platelets are responsible for blood clotting.
WBC is called as true cell because of
-
Presence of nucleus
-
Phagocytosis
-
Polymorphism
-
None of the above
The components of blood consists of red blood cells, white blood cells and platelets. Of these, only white blood cells are true cells or complete cells as they have a nucleus, organelles and other cell structures and processes such as expressing proteins.
Thus, the correct answer is option (A).
Diapedesis means.
-
Movement of the food in gut
-
Formation of W.B.C.
-
The process by which leucocytes squeeze through thin capillary wall
-
Formation of R.B.C.
Increase in number of leukocytes beyond normal indicates
-
Anaemia
-
Infection
-
Increased defence against pathogen
-
Non-formation of RBC.
A high white blood cell(leukocyte) count isn't a specific disease, but it can indicate another problem, such as infection, stress, inflammation, trauma, allergy, or certain diseases. That's why a high white blood cell count usually requires further investigation.
Number of leucocytes present in one $mm^3$ of blood is
-
5000-8000
-
2000-3000
-
8000-13000
-
1 million to 1.5 million
Which is correct about leucocytes?
-
They are red coloured.
-
They can cross capillaries.
-
They are enucleate.
-
Decrease in their number causes leukemia.
Which one produces antibodies?
-
Macrophages
-
Plasma cells/Lymphocytes
-
Mast cells
-
Fibroblasts.
Which one are granulocytes?
-
Neutrophils, basophils, lymphocytes
-
Eosinophils, basophils, monocytes
-
Basophils, monocytes, lymphocytes
-
Neutrophils, eosinophils, basophils
- Eosinophils: These cells play important role in immunity and allergic reactions. These make about 1 - 5% of total leucocytes.
- Basophils: These cells contain heparin, serotonin and histamine. These make about 0.5 - 2.7% of total leucocytes.
- Neutrophils: These cells perform phagocytosis and also destroy bacteria. These make about 60 - 70% of total leucocytes.
- Lymphocytes: These cells are of two types, B lymphocytes that maintain humoral immunity and T lymphocytes which maintain cell mediated immunity. These make about 20 - 40% of total leucocytes.
- Monocytes: These cells are actively motile and phagocytic cells. These make about 2 - 7% of total leucocytes.
Which one is not a WBC?
-
Lymphocyte
-
Thrombocyte
-
Monocyte
-
Basophil.
Lymph consists of
-
RBCs, WBCs and plasma
-
RBCs, proteins and platelets
-
All components of blood except RBCs and some proteins
-
WBCs and serum.
Abnormal fall in total count of WBCs in the human blood is called
-
Anaemia
-
Polycythemia
-
Leucopenia
-
Leukaemia
During fever pyrogens are released by
-
Virus
-
Bacteria
-
RBC
-
WBC.
Which of the following is related to leucocytes?
-
They undergo diapedesis or squeeze through capillary walls
-
Sudden fall in number indicates cancer
-
Produced in thymus
-
Enucleate
Find the correct descending order of percentage proportion of leucocytes in human blood
-
NeutrophiIs $\rightarrow$ Basophils $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Monocytes
-
Neutrophils $\rightarrow$ Monocytes $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils
-
Neutrophils $\rightarrow$ Lymphocytes $\rightarrow$ Monocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils
-
Neutrophils $\rightarrow$ Acidophils $\rightarrow$ Basophils $\rightarrow$ Lymphocytes $\rightarrow$ Monocytes.
Which one is agranulocyte?
-
Basophil
-
Eosinophil
-
Lymphocyte
-
Neutrophil
- Eosinophils- These cells play important role in immunity and allergic reactions.
- Basophils- These cells secrete histamine, serotonin and heparin.
- Neutrophils- These cells perform phagocytosis.
- Lymphocytes- These cells produce antibodies.
- Monocytes- These cells are phagocytic.
In terms of descending order of percentage proportions of leucocytes in human blood, which one is correct?
-
Neutrophils $\to$ lymphocytes $\to$ monocytes $\to$ acidophils $\to$ basophils
-
Neutrophils $\to$ basophils $\to$ lymphocytes $\to$ acidophils monocytes
-
Neutrophils $\to$ monocytes $\to$ lymphocytes $\to$ acidophils $\to$ basophils
-
Neutrophils $\to$ acidophils $\to$ basophils $\to$ lymphocytes $\to$ monocytes
Cells | Percentage proportion of total leucocyte count | $Cells/mm^3$ of blood |
---|---|---|
Cells | ||
Percentage proportion of total leucocyte count | ||
Neutrophils | 60-70% | 4000-5000 cells/$mm^3$ |
60-70% | ||
Lymphocytes | 20-40% | 1500-2500 cells/$mm^3$ |
Monocytes | 2-7% | 200-700 cells/$mm^3$ |
Acidophils | 1-5% | 70-300 cells/$mm^3$ |
Basophils | 0.5-2.7% | 35-150 cells/$mm^3$ |
0.5-2.7% |
Thus, the correct answer is (A).
Vincristin and Vinblastin, the chemical substances that can cure Leukemia, are obtained from __________________.
-
Rauwolfia sepentina
-
Catharanthus roseus
-
Witania somnifera
-
Strychnos nux-vomica
Select the incorrect statements
I. Barr body is an another name for neutrophilis
II. Agranulocytes are formed in the red bone marrow
III. Granulocytes are formed is the spleen and lymph node
IV. Lymphocytes exists as two major types, B and T lymphocytes
The correct option with incorrect statements is
-
I, II and III
-
Only I
-
Only III
-
Only II
I.Barr body is an another name of neutrophilis is false – because Barr body is a inactive X chromosome.
II.Agranulocytes are formed in the red bone marrow – False, because, they are formed from the bone marrow of the human being
III.Granulocytes are formed in the spleen and lymph node – False, because granulocytes are formed from myeloid stem cells
IV.Lymphocytes exists as two major types, B and T lymphocytes – True.
So, the correct option is ‘I, II and III’.
Which of the following components of blood fights infection?
-
White blood cells
-
Platelets
-
Red blood cells
-
All of these
The white blood cells or leukocytes are the blood components primarily involved in fighting the infection.
In a healthy adult man, the commonest and smallest type of leucocytes are
-
Basophils
-
Monocytes
-
Eosinophils
-
Lymphocytes
Lymphocytes are the smallest leukocytes with a rounded nucleus. They flow through the lymphatic system or fluid and consist of Natural killer cells, B-Lymphocytes and T-lymphocytes and defend the body against pathogens and infections.
Which statement is true for WBC?
-
Non-nudeated
-
Its deficiency causes cancer
-
Manufactured only in thymus
-
Can squeeze through blood capillaries
Lymphocytes a type of WBC or Leukocyte can squeeze through the walls of the capillaries into the interstitial fluid to the site of infection, or in response to inflamation by a process called as diapedesis.
A type of white blood cell with a very large nucleus, rich in DNA, and a small amount of clear cytoplasm, is found in the blood. It produces antibodies and is important in defence against disease. Name it.
-
Lymphocyte
-
Myeloid cell
-
Fibroblast
-
Neutrophil
Which blood cells transport oxygen?
-
Red
-
White
-
Both A and B
-
None of the above
Erythrocytes or red blood cells (RBC) are the most abundant of all the cells in blood. A healthy adult man has, on an average, 5 millions to 5.5 millions of RBCs per cubic mm of blood. RBCs are formed in the red bone marrow in the adults. RBCs are devoid of nucleus in most of the mammals and are biconcave in shape. They have a red coloured, iron containing complex protein called haemoglobin, hence the colour and name of these cells. These molecules play a significant role in transport of respiratory gases like oxygen and carbon dioxide.
Which one is smallest?
-
Eosinophil
-
Basophil
-
Neutrophil
-
Monocyte
A.Eoisinophil - These cells are 10 - 15 µm in diameter
B.Basophils - They are 14-16 µm in diameter,
C.Neutrophil – The cells are 12 to 17 µm in diameter
D.Monocyte – The cells are 15 to 30 µm in diameter.
So, the correct option is ‘Eosinophils’.
Migration of phagocytes and other leucocytes towards the place of infection occurs through
-
Thromnosis
-
Diapedesis
-
Emboly
-
Phagocytosis
Choose the correct answer from the alternatives given.
The __ produces white blood cells, which function in __ and __.
-
liver; oxygen transport; defense
-
lymph nodes; oxygen transport; pH stabilization
-
bone marrow; housekeeping; defense
-
bone marrow; PH stabilization; defense
The bone marrow produces white blood cells which function in housekeeping and defense by fighting against the invading pathogens.
Macrophages are derived from
-
Basophils
-
Monocytes
-
Neutrophils
-
Eosinophils
Macrophages are scavenging cells derived from monocytes and are found all over the body. These infiltrate the tissue during an inflammatory response.