Description : Which of the following is true with reference to blood platelets? (1) They have prominent nuclei (2) They are involved in phagocytosis (3) They have a pigment called haemoglobin (4) They are also called thrombocytes
Last Answer : (4) They are also called thromb-ocytes. Explanation: Platelets, also called thrombocytes, are a component of blood whose function is to stop bleeding by clumping and clotting blood vessel injuries. ... red and white blood cells, platelets are not actually cells but rather small fragments of cells.
Description : Each of the following regarding plasma cells is true EXCEPT: C A. The nuclei display prominent peripheral chromatin B. They are derived from B lymphocytes C. They contain prominent absorptive vacuoles D. None of these
Last Answer : They contain prominent absorptive vacuoles
Description : Blood platelets are: a) cytoplasmic fragments b) free nuclei c) a kind of red cell d) found only during clot formation
Last Answer : ANSWER: A -- Cytoplasmic fragments
Description : Platelets have a wide array of functions in inflammation. Which of the following are among these? a. Synthesis and release of vasoactive eicosanoids b. Release of chemotactic factors c. ... coating of bacterial and tumor cells d. Increase of vascular permeability e. Phagocytosis of bacteria
Last Answer : Answer: a, b, c, d Platelets are anucleated cells derived from megakaryocytes in the bone marrow. Their central role in hemostasis is well known. Platelets possess a wide ... primitive precursor inflammatory cell. Platelets serve primarily as an amplifier or modulator of the inflammatory response
Description : Which of the following statement(s) is/are true concerning the cell function of phagocytosis? a. Phagocytosis is a mechanistically distinct process of endocytosis performed by special cells to take ... known as clathrin d. Phagocytosis is performed only by white blood cells and tissue macrophages
Last Answer : Answer: a Phagocytosis is a specialized form of endocytosis by which large particles are internalized by specialized cells primarily macrophages and neutrophils. To be phagocytosed, particles ... the lumen of the thyroid follicle, thereby releasing the thyroid hormones, thyroxine triiodothyronine
Description : Haemoglobin is an important constituent of – (1) Red blood cells (2) White blood cells (3) Platelets (4) Plasma
Last Answer : (1) Red blood cells Explanation: Hemoglobin is the ironcontaining oxygen-transport metalloprotein in the red blood cells of all vertebrates. Hemoglobin in the blood carries oxygen from the respiratory ... carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism.
Description : Haemoglobin is an important constituent of (1) Red blood cells (2) White blood cells (3) Platelets (4) Plasma
Last Answer : Red blood cells
Description : The cells of the quiescent centre are characterised by (a) having dense cytoplasm and prominent nuclei (b) having light cytoplasm and small nuclei (c) dividing regularly to add to the corpus (d) dividing regularly to add to tunica.
Last Answer : (b) having light cytoplasm and small nuclei
Description : The cells of the quiescent centre are characterised by (a) having dense cytoplasm and prominent nuclei (b) having light cytoplasm and small nuclei (c) dividing regularly to add to the corpus (d) dividing regularly to add to tunica
Last Answer : b) having light cytoplasm and small nuclei
Description : What are the identifying features of meristematic tissues? (a) thick cellulose wall, small vacuoles, dense cytoplasm, small nuclei (b) thin cellulose wall, almost no vacuoles, dense cytoplasm, ... sparse cytoplasm, prominent nuclei (d) thick cellulose, large vacuoles, sparse cytoplasm, small nuclei
Last Answer : (b) thin cellulose wall, almost no vacuoles, dense cytoplasm, prominent nuclei
Description : White bloods cells are also known as----? A. Thrombocytes B. Leucocytes (Answer) C. Erythrocytes D. None of These
Last Answer : B. Leucocytes (Answer)
Description : Which one of the following is the respiratory pigment in man? (1) Haernocyanin (2) Haemoerythrin (3) b-Carotene (4) Haemoglobin
Last Answer : (4) Haemoglobin Explanation: A respiratory pigment is a molecule, such as hemoglobin in humans, which increases the oxygencarrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
Description : Haemoglobin is a type of (a) carbohydrate (b) respiratory pigment (c) vitamin (d) skin pigment.
Last Answer : (b) decrease in number
Description : Which one of the following is the respiratory pigment in man ? (1) Haemocyanin (2) Haemoerythrin (3) b-Carotene (4) Haemoglobin
Last Answer : Haemoglobin
Description : Transport of oxygen by blood takes place with the help of (1) Erythrocytes (2) Thrombocytes (3) Lymphocytes (4) Leuecocytes
Last Answer : (1) Erythrocytes Explanation: Red blood cells, or erythrocytes, are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O2) to the body tissues via ... iron-containing bio-molecule that can bind oxygen and is responsible for the blood's red color.
Description : Sickle-cell anemia is a disease caused due to the abnormality in – (1) white blood cells (2) red blood cells (3) thrombocytes (4) blood plasma composition
Last Answer : (2) red blood cells Explanation: Sickle cell anemia (sickle cell disease) is a disorder of the blood caused by an inherited abnormal hemoglobin (the oxygencarrying protein within the red blood cells).
Description : Component of blood responsible for producing antibodies is (a) thrombocytes (b) monocytes (c) erythrocytes (d) lymphocytes
Last Answer : (d) lymphocytes.
Description : Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body. (a) Erythrocytes (b) Leucocytes (c) Neutrophils (d) Thrombocytes
Last Answer : (d) Thrombocytes
Description : The several types of white blood cells are sometime collectively referred to as: a) erythrocytes (pron: eh-rith-row-cites) b) leukocytes (pron: lew-kah-cites) c) erythroblasts (pron: eh-rith-rah-blast) d) thrombocytes (pron: throm-bow-cites)
Last Answer : ANSWER: B -- leukocytes
Description : Transport of oxygen by blood takes place with the help of (1) Erythrocytes (2) Thrombocytes (3) Lymphocytes (4) Leucocytes
Last Answer : Erythrocytes
Description : Which of the following statements regarding endothelial cells in acute inflammation are true? a. Endothelial cells are characterized by phenotypic homogeneity b. Specific patterns of receptor expression ... blood flow and leukocyte adhesion d. Endothelial cells may be capable of phagocytosis
Last Answer : Answer: b, c, d Endothelial cells are increasingly recognized to be phenotypically heterogeneous. Specific receptor molecules are expressed at various sites where they help to direct lymphocytes and ... rather, they possess the ability to direct and focus many aspects of an inflammatory event
Description : Canal irrigation is not much prominent in NE because, A. They have other mode of irrigation. B. Land is highly uneven. C. Agriculture not much developed there. D. They are involved more in forestry.
Last Answer : B. Land is highly uneven.
Description : What is triple fusion? Name the nuclei involved in triple fusion.
Last Answer : Ans: Fusion of male gamete with diploid secondary nucleus to form triploid primary endosperm nucleus is known as triple fusion. In triple fusion two polar nuclei and one male gamete are involved.
Description : Identify the wrong statement with reference to transport of oxygen. (a) Binding of oxygen with haemoglobin is mainly related to partial pressure of O2. (b) Partial pressure of CO2 can interfere ... the formation of oxyhaemoglobin. (d) Low pCO2 in alveoli favours the formation of oxyhaemoglobin.
Last Answer : (c) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin.
Description : Laboratory monitoring of coagulation and anticoagulation includes testing of platelet function. Which of the following statements is/are true concerning tests of platelet function? a. A ... platelet aggregation should be part of the standard preoperative evaluation of patients using aspirin
Last Answer : Answer: a, c Tests of platelet function include peripheral platelet counts, bleeding times, and platelet aggregation. Usually, a platelet count of 50,000/mL or more ensures adequate hemostasis ... is not available in most laboratories, probably because of the observer-dependent nature of the test
Description : Which of the following statements about the preparation and storage of blood components is/are true? A. Solutions containing citrate prevent coagulation by binding calcium. B. The ... cells includes development of acidosis, hyperkalemia, and decreased intracellular 2,3DPG (diphosphoglycerate).
Last Answer : Answer: ABD DISCUSSION: After blood has been collected from a donor, it is anticoagulated with a solution containing citrate, which acts by binding calcium. Blood is then separated into its ... transfusion or produce effects other than those predicted based on the content of the unit of blood
Description : The following are true about blood coagulation: a. heparin inhibits blood coagulation through its interference with vitamin K metabolism in the liver b. addition of vitamin K to freshly drawn ... delays clotting c. thrombin converts fibrinogen to fibrin d. platelets are essential for blood clot
Last Answer : thrombin converts fibrinogen to fibrin
Description : Which of the following statements is true for lymph? (a) WBC + serum (b) Blood – RBCs and some proteins (c) RBCs + WBCs + plasma (d) RBCs + proteins + platelets
Last Answer : (b) Blood – RBCs and some proteins
Description : Glucose is the only source of energy for (A) Myocardium (B) Kidneys (C) Erythrocytes (D) Thrombocytes
Last Answer : Answer : C
Description : HIV that causes AIDS, first starts destroying (a) helper T-lymphocytes (b) thrombocytes (c) B-lymphocytes (d) leucocytes.
Last Answer : (a) helper T-lymphocytes
Description : In which one of the following preparations are you likely to come across cell junctions most frequently? (a) Thrombocytes (b) Tendon (c) Hyaline cartilage (d) Ciliated epithelium
Last Answer : (d) Ciliated epithelium
Description : Of the following, which mechanisms are important i the death of erythrocytes (pron: eh-rith-reh-sites) in human blood? Is it a) phagocytosis (pron: fag-eh-seh-toe-sis) b) hemolysis c) mechanical damage d) all of the above
Last Answer : ANSWER: D -- all of the above
Description : The piament involved in red - far red light interconversion is Or The pigm,ent involved in photomorphogenetic movements is Or Pigment involved in phot
Last Answer : The piament involved in red - far red light interconversion is Or The pigm,ent involved in ... Carotene B. Phytochrome C. Cytochrome D. Lycopene
Description : The pigment involved in photo morphogenetic movements is: (a) Cytochrome (b) Phytochrome (c) Chromatin (d) Vernalin
Last Answer : Ans. ((b))
Description : The pigment involved in photosynthetic activity is - (1) anthocyanin (2) fucxanthin (3) carotenoid (4) chlorophyll
Last Answer : (4) chlorophyll Explanation: Chlorophyll is an extremely important bio-molecule, critical in photosynthesis, which allows plants to absorb energy from light. Chlorophyll absorbs light most strongly in ... near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues.
Description : Which vitamin is involved in visual pigment formation
Last Answer : ANSWER: VITAMIN A or BETA CAROTENE or CAROTENE
Description : The pigment involved in photosynthetic activity is (1) anthocyanin (2) fucxanthin (3) carotenoid (4) chlorophyll
Last Answer : chlorophyll
Description : What also called the platelets?
Last Answer : Need answer
Description : Which of the following statement(s) is/are true about the role of macrophages in the wound healing process? a. Macrophages are the dominant cell type during the inflammatory phase of wound ... phagocytosis d. Macrophages are a source of a number of humoral factors essential for wound healing
Last Answer : Answer: a, d Within three or four days after injury, macrophages become the dominant cell type in the inflammatory phase of wound healing. The role of macrophages is not limited only ... . These studies confirm the dominant role of the macrophage and the inflammatory phase of wound healing
Description : The following are true: a. Ig G crosses the placenta b. thymus gland is responsible for cellular immunity c. C1-9 is used by the alternative complement pathway d. eosinophils are responsible for phagocytosis
Last Answer : Ig G crosses the placenta
Description : The following are true about tight junction: a. it forms a barrier to water b. it is found in the blood-aqueous barrier of the ciliary body c. it is found in the blood-retinal barrier at the apex of the retinal pigment epithelium d. all above
Last Answer : all above
Description : Which blood cells are called ‘Soldiers’ of the body? A. White Blood Cells (Answer) B. Platelets C. Red Blood Cells D. None of the above
Last Answer : A. White Blood Cells (Answer)
Description : Study of diseases of blood cells, platelets and the tissues and organs of hematopoietic system is called as __________. a. Forensic pathology b. Clinical pathology c. Immunopathology d. Hematopathology
Last Answer : d. Hematopathology
Description : The following are true about platelets: a. they are formed in the bone marrow from megakaryocytes. b. their life span in circulation is about 30 days c. in a normal person, 20% of the platelets are found in the spleen. d. they contain adenosine diphophate and serotonin.
Last Answer : they contain adenosine diphophate and serotonin.
Description : What biconcave cells in blood that lack nuclei when they are mature?
Description : If I've been cancer-free since '97, can I donate anything (blood, bone marrow, platelets, plasma?)
Last Answer : I am pretty sure you can’t. We had a Q a while back discussing just this, and I seem to remember you would be excluded from donating. If you google blood donation in your city you will probably come up with a place you can call and ask. I mean, where are you planning to donate your bood? Call there.
Description : How do platelets initiate blood clotting? -Biology
Last Answer : answer:
Description : Assertion `:-` Platelets repair dammaged endothelium of blood vessels. Reason `:` Platelets secrete serotonin which is a vaso constrictor
Last Answer : Assertion `:-` Platelets repair dammaged endothelium of blood vessels. Reason `:` Platelets secrete ... . If both Assertion & Reason are false.
Description : Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an injury, the platelets disintegrate and release thro
Last Answer : Assertion: Platelets play an important role in blood clotting. Reason: In the blood oozing from an ... D. If both Assertion & Reason are false.
Description : Blood platelets are present in the blood of
Last Answer : Blood platelets are present in the blood of A. Birds B. Reptiles C. Mammales D. Amphibians