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Free download in PDF Circulatory System Objective Type Questions & Answers for competitive exams. These Circulatory System Objective Questions with Answers are important for competitive exams of Biology, Life Science, Zoology and other Board Exams etc. These short solved questions or quizzes are provided by Gkseries.
(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)
(23)
The antibodies are
[A]
Proteins
[B]
Carbohydrates
[C]
Lipids
[D]
Germs
(24)
Which is the principal cation in the plasma of the blood?
[A]
Potassium
[B]
Magnesium
[C]
Calcium
[D]
Sodium
(25)
Rate of heart beat is determined by
[A]
Purkinje fibres
[B]
papillary muscles
[C]
AV-node
[D]
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
(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
(28)
In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be
(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
(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
32
Which one of the following has an open circulatory system?
[A]
Octopus
[B]
Pheretima
[C]
Periplaneta
[D]
Hirudinaria
33
One of the factors required for the maturation of erythrocytes is
[A]
vitamin - D
[B]
vitamin - A
[C]
vitamin - B12
[D]
vitamin – C
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
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
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
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
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