Circulatory System Questions | Circulatory System Objective Type Questions & Answers

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Questions
21 An adult human with average health has systolic and diastolic pressures as
A 120 mm Hg and 80 mm Hg
B 50 mm Hg and 80 mm Hg
C 80 mm Hg and 80 mm Hg
D 70 mm Hg and 120 mm Hg

Answer: 120 mm Hg and 80 mm Hg
22 The thickening of walls of arteries is called
A Arteriosclerosis
B Arthritis
C Aneurysm
D Both (B) And (C)

Answer: Arteriosclerosis
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23 The antibodies are
A Proteins
B Carbohydrates
C Lipids
D Germs

Answer: Proteins
24 Which is the principal cation in the plasma of the blood?
A Potassium
B Magnesium
C Calcium
D Sodium

Answer: Sodium
25 Rate of heart beat is determined by
A Purkinje fibres
B papillary muscles
C AV-node
D SA-node

Answer: SA-node
26 Difference between pulmonary artery and pulmonary vein is that, the pulmonary artery has
A No Endothelium
B Valves
C Thicker Walls
D Oxygenated Blood

Answer: Valves
27 Short-lived immunity acquired from mother to foetus across placenta or through mother’s milk to the infant is categorised as
A Active Immunity
B Passive Immunity
C Cellular Immunity
D Innate Non-Specific Immunity

Answer: Passive Immunity
28 In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be
A B
B O
C AB
D A

Answer: AB
29 The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
A Atrioventricular Bundle
B Purkinje System
C Sinuatrial Node
D Atrioventricular Node

Answer: Sinuatrial Node
30 You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?
A Test Tube Containing Calcium Bicarbonate
B Chilled Test Tube
C Test Tube Containing Heparin
D Test Tube Containing Sodium Oxalate

Answer: Test Tube Containing Heparin
31 AIDS is caused by HIV that principally infects
A All Lymphocytes
B Activator B Cells
C Cytotoxic T Cells
D T4 Lymphocytes

Answer: T4 Lymphocytes
32 Which one of the following has an open circulatory system?
A Octopus
B Pheretima
C Periplaneta
D Hirudinaria

Answer: Periplaneta
33 One of the factors required for the maturation of erythrocytes is
A vitamin - D
B vitamin - A
C vitamin - B12
D vitamin – C

Answer: vitamin - B12
34 The thick muscular projections on the walls of the ventricle are called
A Chordae tendineae
B Columnae carneae
C Conus arteriosus
D All Of The Above

Answer: Columnae carneae
35 When type B agglutinogen is not present on the surface of RBC of a person, his plasma would contain ____ agglutinins.
A Anti-a
B Anti-b
C Both anti-a and anti-b
D None

Answer: Anti-b
36 Oxalates and citrates are used as anticoagulants in stored blood because they:
A Chelate calcium ions
B Act as competitive inhibitors of vitamin K
C Potentiate anti-thrombin III
D Activate heparin

Answer: Chelate calcium ions
37 Histamine in blood is secreted by:
A Mast cells
B Macrophages
C Eosinophils
D Basophils

Answer: Basophils
38 A person with AB blood group:
A Has A and B antigens in his plasma
B Lacks any antibodies on RBC surface
C Can receive blood transfusion from a person of his own group
D Can donate blood to all other group recipients

Answer: Can receive blood transfusion from a person of his own group
39 The inter-atrial septum in the human heart can be best described as:
A A thin muscular wall
B A thick muscular wall
C A thin fibrous tissue
D A thick fibrous tissue

Answer: A thin muscular wall
40 What percentage of ventricular filling is achieved by atrial contraction?
A 30
B 50
C 70
D 90

Answer: 30

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