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Thursday, February 25, 2021

Top 100 questions of blood circulating and heart for neet 2021

Assertion: The cardiac output of an ordinary man and of an athlete is
the same.
Reason: It is impossible to alter the stroke volume as well as heart
rate.
(1) Both assertion and reason are true and reason is the
correct explanation of assertion.
(2) Both assertion and reason are true but reason is not the
correct explanation of assertion.
(3) Assertion is true but reason is false
(4) Both assertion and reason are false.


Deposition of fatty substances in the lining of arteries is termed as
(1) arteriosclerosis
(2) atherosclerosis
(3) arthritis
(4) angiogenesis

3. Blood pressure in the pulmonary artery is
(1) more than that in the pulmonary vein
(2) less than that in the venae cavae
(3) same as that in the aorta
(4) more than that in the carotid.

Name the blood cells, whose reduction in number can cause clotting
disorder, leading to excessive loss of blood from the body.
(1) Erythrocytes
(2) Leucocytes
(3) Neutrophils
(4) Thrombocytes

5. The depolarisation of the atria is represented by
(1) P-wave
(2) Q-wave
(3) T-wave
4) QRS complex.

Match the column I and column I and select the appropriate option
with the given code.
Column
Column II
(0 Mitral valve
P.Coronary sinus
9. Base of systemic aorta
00 EUstachian valve
(ii) Semilunar valves
R. Left atrioventricular
valve
S. Opening of inferior
(iv) Thebesian valve
vena cava
(1) P-(V); Q-(ii), R-(0), S-()
(2) P-(i); Q-(V), R-(i), S-)
(3) P-(i); Q-0), R-(), S-(0i
(4) P-0: Q-i), R-(ii), S-(iv)

Pulmonary vein carries
(1) deoxygenated blood
(2) oxygenated blood
(3) mixed blood
(4) none of these.

The granulocytes which secretes histamine, serotonin and heparin are
(1) neutrophils
(2) basophils
(3) eosinophils
(4) lymphocytes
(5) monocytes.

Heart attack is also called
(1) arteriosclerosis
(2) angina pectoris
(3) bradycardia
(4) myocardial infarction.

How many heme molecules are present in one molecule of
haemoglobin?
(1) 1
(2) 2
(3) 3
(4)4

Bundle of His is a network of
(1) muscle fibres distributed throughout the heart walls
(2) muscle fibres found only in the ventricle wal
(3) nerve fibres distributed in ventricles
(4) nerve fibres found throughout the heart.

Match the items given in column I with those in column ll and select
the correct option given below.
Column
Column I
() Osmotic balance
A. Fibrinogen
(Gi) Blood clotting
(ii) Defence mechanism
B. Globulin
C. Albumin
AB C
(b)0) (Gi) (io


Given below is the ECG of a normal human. Which one of its
components is correctly interpreted below?
(1) Complex QRS- one complete pulse
2)Peak T-initiation of total cardiac contraction
(3) Peak P and peak R together -systolic and diastolic blood
pressures
(4) Peak P- initiation of left atrial contraction only.

The role of pacemaker in heart is to
(1) initiate heart beat
(2) control blood pressure
(3) control atherosclerosis
(4) purify blood.

In the following diagram of T.S. of artery, the region marked *is
(1) tunica media
(2) tunica externa
(3) tunica interna
(4) tunica albuginea.

The thickening of walls of arteries is called
(1) arteriosclerosis
(2) arthritis
(3) aneurysm
(4) both (b) and (c).

Arteries are best defined as the vessels which
(1) supply oxygenated blood to the different organs
(2) carry blood away from the heart to different organs
(3) break up into capillaries which reunite to forma vein
(4) carry blood from one visceral organ to another visceral
organ.


Which one of the following is the correct pathway for propagation of
cardlac impulse ?
(1)
SA nodeAV node Bundie of HisPurkinje
fibres
(2)
AV node Bundle of His SA node Purkinje
fibres
(3)
SA node Purkinje fibres AV node Bundle of
s
(
Purkinje fibresAV nodeSA nodeBundle of
IS

Mature RBCs lose their ability for
(1) DNA replication
(2) Anaerobic respiration
(3) Aerobic respiration and DNA replication
(4) Aerobic respiration, DNA replication and RNA synthesising
machinery.

Assertion: SA node malfunctioning leads to disturbance of heart rate.
Reason: SA node is the pacemaker of heart producing electric impulse
for heart contraction.
(1) Both assertion and reason are true and reason is the
correct explanation of assertion.
(2) Both assertion and reason are true but reason is not the
correct explanation of assertion.
(3) Assertion is true but reason is false.
(4) Both assertion and reason are false.


The volume of blood each ventricle pumps out during a cardiac cycle
is about
(1) 70 mL
(2) 5000 mL
(3) 7L
(4) 1200 mL
(5) 40 mL.

Match the items given in column I with those in column ll and select
the correct option given below.
Column
A. Tricuspid valve
B. Bicuspid valve
Column I
0) Between left atrium and left ventricle
(i) Between right ventricle and pulmonary
artery
C.Semilunar valve
AB C
(Gi) Between right atrium and right ventricle


Given below are four statements (-) regarding human blood
circulatory system.
(0 Arteries are thick-walled and have narrow lumen as compared to
veins.
(i) Angina is acute chest pain when the blood circulation to the brain is
reduced.
(i) Persons with blood group AB can donate blood to any person with
any blood group u
system.
(v) Calcium ions play a very important role in blood clotting
Which two of the above statements are correct ?
(1) 0) and ()
(2) (0) and (i)
(3) (i) and (0)
(4) (i) and (iv)


24. The T-wave in an ECG represents
(1) depolarisation of ventricles
(2) electrical excitation of atria
(3) beginning of systole
(4) return of the ventricles from excited state.


Which one of the following plasma proteins is involved in the
coagulation of blood?
(1) Albumin
(2) Serum amylase
(3) Globulin
(4) Fibrinogen

What is diapedesis?
(1) A kind of amoeboid movement
(2) The process of filtration of urea in kidney
(3) A type of locomotion found in Hydra
(4) Migration of WBCs into the tissue spaces from blood
capillaries

Which one of the following is mainly responsible for the second heart
sound?
(1) Closure of atrioventricular valvesS
(2) Opening of atrioventricular valves
(3) Closure of semilunar valves
(4) Thrust of blood on ventricular wall during atrial contraction

A person with blood group AB has which of the following antigens in
his RBCs?
(1) A
(2) B
(3) AB
(4) none of these

Thrombokinase is associated with
(1) elimination of urea and other excretory products from the
body
(2) production of erythrocytes from the bone marrow
(3) pulmonary and systemic circulation
(4) cardiac cycle and its regulation
(5) enzymatic reactions in coagulation of blood.


Purkinje fibres are present in
(1) heart
(2) lungs
(3) liver
(4) kidney.

Read the statements A and B and select the correct option
StatementA: Atherosclerosis is a disease characterised by the
thickening of arterial walls
Statement B: Deposition of cholesterol and triglycerides in the
arterial walls causes atherosclerosis.
(1) Statement A is correct, B is wrong
(2) Both the statements are correct but not related to each
other.
(3) Both the statements are correct and B is the reason for A.
(4) Both the statements are wrong.


Adult human RBCs are enucleate. Which of the following statement(s)
is/are most appropriate explanation for this feature?
(1) They do not need to reproduce,.
(2) They are somatic cells.
(3) They do not metabolise.
(4) All their internal space is available for oxygen transport.
(1) Only (1)
(2) (1), (3) and (4)
(3)(2) and (3)
(4) Only (4)


Person with blood group AB is considered as universal recipient
because he has
(1) both A and B antigens on RBC but no antibodies in the
plasma
(2) both A and B antibodies in the plasma
(3) no antigen on RBC and no antibody in the plasma
(4) both A and B antigens in the plasma but no antibodies.

Which of the following is required for RBC formation?
(1) VitaminC
(2) Vitamin B12
(3) Folic acid
(4) All of these

Choose the correctly matched pair.
(1) CAD -Atherosclerosis
(2) Tetany- Disorder of neuromuscular junction
(3) Gout-Rapid spasms in muscles
(4) Goitre- Hyperthyroidism
(5) Asthma -Alveolar wall are damaged


Choose the correct statement.
(1) The T-wave in an ECG represents excitation of ventricles.
(2) The sum of P and T waves in a given time period can
determine the heart beat rate of an individual.
(3) The end of the P-wave marks the end of the systole.
(4) In a standard ECG, a person is connected to the machine
with three electrical leads.
(5) In a normal ECG, the highest peak is represented by 'S.


Which valve is present at the opening of coronary sinus?
(1) Mitral valve
(2) Eustachian valve
(3) Thebesian valve
(4) Tricuspid valve


Which of the following is a type of white blood cell ?
(1) Reticulocyte
(2) Lymphocyte
(3) Erythrocyte
(4) Osteocyte

Most of our cells are surrounded by
(1) blood
(2) fluid equivalent to seawater in salt composition
(3) interstitial fluid
(4) pure water.

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