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Quiz 7
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Q.1
Difference systolic and diastolic pressure is ... ... [ MHTCET 2010]
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a) Blood pressure
0%
b) Pulse pressure
0%
c) Cardiac output
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d) Pulse
Explanation
Pulse pressure is the difference between the systolic and diastolic pressure readings. It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts. For example, if resting blood pressure is 120/80 mm Hg,pulse pressure is 40 mmHg. Answer : (b)
Q.2
The cation ( mineral) necessary for coagulation of blood is ... [ EAMCET 1995 ]
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a) Na
0%
b) Ca
0%
c) K
0%
d) Cl
Explanation
The prothrombinase in presence of Ca ions converts inactive plasma protein called prothrombin into active thrombin. Answer : (b)
Q.3
Volume of blood that enters aorta with each ventricular systole is ... ... [ KCET 2012 ]
0%
a) Vital capacity
0%
b) Cardiac cycle
0%
c) Stroke volume
0%
d) Cardiac output
Explanation
stroke volume (SV) is the volume of blood pumped from the left ventricle per beat Answer : (c)
Q.4
Arteries are best defined as vessels which ... ... [ CBSE 2011 ]
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a) Break up into capillaries which reunite to form a vein
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b) Carry blood away from heart to different organs
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c) Supply oxygenated blood to different organs
0%
d) Carry blood from one visceral organ to another visceral organ
Explanation
Answer : (b)
Q.5
In which of the following situations, there is risk of erythroblastosis foetalis ... .. [ KCET 2010 ]
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a) Mother Rh+, father Rh+
0%
b) Mother Rh-, father Rh-
0%
c) Mother Rh-, father Rh+
0%
d) Mother Rh+, father Rh-
Explanation
Erythroblastosisfetalis is hemolytic anemia in the fetus ( Also called as erythroblastosis ) This condition occurs when there is an incompatibility between the blood types of the mother and baby. It occurs when an Rh negative mother has a baby with Rh factor is positive Answer : (c)
Q.6
Rh factor can produce ... ... [ MPPMT 1992 ]
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a) AIDS
0%
b) Erythroblastosis foetalis
0%
c) Turner's syndrome
0%
d) Sickle cell anaemia
Explanation
AIDS (acquired immunodeficiency syndrome) is a syndrome caused by a virus called HIV (human immunodeficiency virus). Erythroblastosisfoetalis is hemolytic anemia in the fetus ( Also called as erythroblastosis ) This condition occurs when there is an incompatibility between the blood types of the mother and baby. It occurs when an Rh negative mother has a baby with Rh factor is positive Turner's syndrome a genetic defect in which affected women have only one X chromosome, causing developmental abnormalities and infertility. Sickle cell anaemia a severe hereditary form of anaemia in which a mutated form of haemoglobin distorts the red blood cells into a crescent shape at low oxygen levels. Answer : (b)
Q.7
Which one prevents blood clotting in blood vessels? [ AFMC 2003 ]
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a) Heparin
0%
b) Fibrinogen
0%
c) Albumin
0%
d) Globulins
Explanation
Heparin a compound occurring in the liver and other tissues which inhibits blood coagulation. A sulphur-containing polysaccharide, it is used as an anticoagulant in the treatment of thrombosis. Fibrinogen a plasma protein that is produced in the liver and is converted into fibrin during blood clot formation. Albumin is the most present protein in the blood. It is made by the liver, but is also supplied by certain foods, mainly milk and eggs. Albumin Globulins are a group of proteins in the blood stream that help to regulate the circulatory system. Answer : (a)
Q.8
Cardiac output is determined by ... ... [ BHU 2008 ]
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a) Blood flow
0%
b) Heart rate
0%
c) Stroke volume
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d) Both b and C
Explanation
Cardiac output is a term used that describes the volume of blood being pumped by the heart, in particular by a left or right ventricle. Stroke volume (SV) is the volume of blood pumped from the left ventricle per beat. Answer : (d)
Q.9
Which is not detected in ECG? [ W.B. 2007 ]
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a) Arrhythmia
0%
b) Myocardial infection
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c) Heart block
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d) Valvular defects
Explanation
Valvular heart disease is characterized by damage to or a defect in one of the four heart valves: the mitral, aortic, tricuspid or pulmonary. Answer : (d)
Q.10
heart of Cockroach has ... ... [ AFMC 2005 ]
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a) 14 chambers
0%
b) 13 chambers
0%
c) 4 chambers
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d) 3 chambers
Explanation
A cockroach's heart has as many as 13 chambers, unlike the four in a human heart. As a result, failure of a single chamber in the former does not become life threatening unlike in the latter, Answer : (b)
Q.11
Rh- persons are ... .. [ Pb PMT 2002 ]
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a) Homozygous dominant
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b) Homozygous recessive
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c) Heterozygous recessive
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d) None of the above
Explanation
Homozygous is a word that refers to a particular gene that has identical alleles on both homologous chromosomes. It is referred to by two capital letters (XX) for a dominant trait, and two lowercase letters (xx) for a recessive trait. And each person has two alleles and can be homozygous Rh+, heterozygous or homozygous Rh- . The Rh+ allele makes a cell surface antigen that appears on the red blood cells and the Rh- allele does not make this antigen. Therefore, Rh+ is dominant to Rh-. If you are Rh positive, you could be homozygous or heterozygous (+ + or + ). If you are Rh negative, you are homozygous recessive ( ). Answer : (b)
Q.12
Blood protein which initiate blood coagulation is ... ... [ KCET 2000 ]
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a) Prothrombin
0%
b) Thrombin
0%
c) Fibrinogen
0%
d) Fibrin
Explanation
Answer : (a)
Q.13
Blood pressure is measured by ... ... [ AIIMS 2000 ]
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a) Sphygmomanometer
0%
b) Phonocardiogram
0%
c) Electrocardiogram
0%
d) Stethoscope
Explanation
Answer : (a)
Q.14
Which is used to prevent bleeding? [ ARMC 1997 ]
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a) Vitamin A
0%
b) Vitamin C
0%
c) Vitamin B12
0%
d) Vitamin K
Explanation
Answer : (d)
Q.15
Erythroblastosis foetalis occurs when a factor from mother passes into foetus through placenta ... ... [ JIPMER 2002 ]
0%
a) Rh antigens
0%
b) Agglutinins
0%
c) Rh antibodies
0%
d) ABO antibodies.
Explanation
If Rh-negative blood mixes with Rh-positive blood, Rh-negative blood will react to the Rh factor by making antibodies to destroy it. This immune system response is called Rh sensitization. But if Rh-negative woman get pregnant again with an Rh-positive baby, the antibodies already in motherr blood could attack the baby's red blood cells. Causes hemolytic anemia in the fetus called Erythroblastosisfoetalis Answer : (c)
Q.16
O blood group is universal donor because the blood has .. .. [ CPMT 1991 ]
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a) Antigen A
0%
b) Antigen B
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c) Both antigens A and B
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d) No antigens
Explanation
Antigen is a molecule capable of inducing an immune response (to produce an antibody) in the host organism. Sometimes antigens are part of the host itself in an autoimmune disease. Antigens are "targeted" by antibodies. Since Gropp ‘O’ don’t have any antigens , so no other group antibodies can attack blood group ‘O’ blood cells Answer : (d)
Q.17
Systemic heart refers to ... .... [ CBSE 2003 ]
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a) Heart that contracts under stimulation from nervous system
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b) Left auricle and left ventricle in higher vertebrates
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c) Entire heart is lower vertebrates
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d) The two ventricles together in humans
Explanation
Answer : (b)
Q.18
Blood buffer is formed of ... ... [ kerala 2004 ]
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a) Haemoglobin and oxyhaemoglobin
0%
b) Oxygen and carbon dioxide
0%
c) Albumin and globulin
0%
d) Sodium bicarbonate and carbonic acid
Explanation
Blood buffer is whole blood,carbonic acid, carbon dioxide, and bicarbonate ions that maintain the proper pH. Answer : (d)
Q.19
The most common type of haemophilia is due to congenital absence of ... ... [ CPMT 2004 ]
0%
a) Factor II
0%
b) Factor V
0%
c) Factor VIII
0%
d) Factor XI
Explanation
There are several types of hemophilia. They are classified according to which clotting factor is deficient: Haemophilia A is a genetic deficiency in clotting factor VIII Hemophilia B, the second most common type, is caused by insufficient clotting factor IX. Hemophilia C, in which signs and symptoms are often mild, is caused by insufficient clotting factor XI. Answer : (c)
Q.20
The ratio of RBC to WBC in humans is ... ... [ CPMT 1993 ]
0%
a) 6 : 1
0%
b) 60 : 1
0%
c) 600 : 1
0%
d) 6000 : 1
Explanation
The ratio of cells in normal blood is 600 RBCs for each white blood cell and 40 platelets. Answer : (c)
Q.21
Blood leaving liver and moving to heart will have more concentration of ... ... [ CPMT 2005 ]
0%
a) Bile
0%
b) Glycogen
0%
c) Amino acids
0%
d) Urea
Explanation
Conversion of poisonous ammonia to urea is one of the function of liver, thus blood leaving to heart have more Urea Answer : (d)
Q.22
'Dup' sound is produced during closure of ... ... [ CBSE 1994 ]
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a) Semilunar valves
0%
b) Bicuspid valve
0%
c) Tricuspid valve
0%
d) Both B and C
Explanation
The second heart sound, or S2, forms the "dub" of "lub-dub" and is composed of components A2 (aortic valve closure) and P2 (pulmonary valve closure). It is caused by the closure of the semilunar valves (the aortic valve and pulmonary valve) at the end of ventricular systole and the beginning of ventricular diastole. Answer : (a)
Q.23
Parasympathetic nervous system ... ... [ MPPMT 1996]
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a) Decreases heart beat
0%
b) Increases heart beat
0%
c) Starts heart beat
0%
d) Has no effect on heart beat
Explanation
The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate Answer : (a)
Q.24
Increase in blood pressure is ... .. [ JKCET 2005 ]
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a) Arteriosclerosis
0%
b) Atherosclerosis
0%
c) Hypertension
0%
d) None
Explanation
.High blood pressure (HBP), also called hypertension, Answer : (c)
Q.25
Which one of the following is important phagocyte? ... [ BHU 2005 ]
0%
a) RBC
0%
b) Basophil
0%
c) Eosinophil
0%
d) Monocyte
Explanation
Phagocyte is a type of cell within the body capable of engulfing and absorbing bacteria and other small cells and particles. Monocytes and their macrophage and dendritic-cell progeny serve three main functions in the immune system. These are phagocytosis, antigen presentation, and cytokine production. Phagocytosis is the process of uptake of microbes and particles followed by digestion and destruction of this material. Answer : (d)
Q.26
Pace maker is ... ... [ CBSE 1999 ]
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a) Instrument for measuring heart beat
0%
b) Instrument for measuring pulse rate
0%
c) Auriculo-ventricular node that provides impulse for heart beat
0%
d) Sinu-auricular node that provides impulse for heart beat
Explanation
Sinu-auricular node (SA node) does not function, or the impulse generated in the SA node is blocked before it travels down the electrical conduction system, a group of cells further down the heart will become its pacemaker Answer : (d)
Q.27
Pulse pressure is ... ... [ CPMT 1997 ]
0%
a) Diastolic pressure
0%
b) Systolic pressure
0%
c) Difference between B and A
0%
d) Pressure in great veins
Explanation
The numeric difference between your systolic and diastolic blood pressure is called your pulse pressure. For example, if your resting blood pressure is 120/80 millimeters of mercury (mm Hg), pulse pressure is 40 - which is considered a normal and healthy pulse pressure. Answer : (c)
Q.28
How does the spleen help maintain blood? ... ... [ BHU 2005]
0%
a) Platelets are stored there
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b) Defective RBCs and platelets are removed
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c) Red blood cells are produced there until death
0%
d) A and B are correct
Explanation
Old red blood cells are recycled in the spleen, and platelets and white blood cells are stored there. The spleen also helps fight certain kinds of bacteria that cause pneumonia and meningitis. Answer : (d)
Q.29
Why open circulatory system is advantageous to some animals? .... ... [ BHU 2005]
0%
a) They uses less metabolic energy
0%
b) They help animal to move faster
0%
c) They don’t need heart
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d) None of the above
Explanation
Closed Circulatory system
Open Circulatory system
Blood flows in continued with vessels and sinus
Blood is not continued with vessels
Does not come into contact with tissue directly
Blood moves through body cavity haemocoel and it moves freely over the tissues
Rapid transport occurs
Slow transport
Greater control of the blood distribution is possible because it is within vessels
Little control of the distribution of blood occurs because it is not confined to vessels
Blood is under high pressure
Blood is under very low pressure
Blood flowing to an organ can be regulated by changing the diameter of blood vessels
Blood flow to an organ cannot be regulated
Blood is more pumped directly where it is needed
Blood is not taken where it is needed directly
More energy efficient
Less energy efficient
Answer : (a)
Q.30
Which is incorrect? ... ... [ Manipur 2005]
0%
a) Veins are typically larger in diameter than arteries.
0%
b) because of their small size, blood flows more rapidly in capillaries than in other parts of circulatory system.
0%
c) walls of arteries are elastic enabling them to stretch and shrink during changes in blood pressure
0%
d) Veins contain more blood than any other part of circulatory system
Explanation
Answer : (d)
0 h : 0 m : 1 s
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