Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 52

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is an agranulocyte?

A
Basophil

B
Eosinophil

C
Lymphocyte

D
Neutrophil
Solution
White blood cells or leukocytes can be granular or agranular depending upon the presence or absence of granules in their cytoplasm.
Granulocytes are granular leukocytes and are of three types:
- Eosinophils: These cells play important role in immunity and allergic reactions.
- Basophils: These cells secrete histamine, serotonin and heparin.
- Neutrophils: These cells perform phagocytosis.
Agranulocytes are non-granular leukocytes and are of two types:
- Lymphocytes: These cells produce antibodies.
- Monocytes: These cells are phagocytic.
So, the correct answer is 'Lymphocyte'.
Question 2
1 / -0

Double circulation is found in the heart of

A
Birds and amphibians

B
Birds and mammals

C
Fishes and amphibians

D
Amphibians and reptiles.

Solution

In double circulation, blood flows twice through the heart, during each cycle of passage through the body. It has two separate circuits - the pulmonary circuit and syatemic circuit. Mammals as well as birds have a complete double circulatory system that allows oxygenated and deoxygenated blood to flow separately from each other within the heart.
So the correct answer will be option B.
Question 3
1 / -0

The factor which initiates intrinsic pathway of blood clotting and triggers cascade reaction is

A
Antihaemophiliac factor (VIII)

B
Christmas factor (IX)

C
Stuart-Prower factor (X)

D
Hageman's factor (XII).
Question 4
1 / -0

Depolarisation of atria is represented by

A
P-wave

B
Q-wave

C
T-wave

D
QRS complex.
Question 5
1 / -0

In ECG, a prolonged PR interval indicates

A
Hyperkalaemia and hypokalaemia

B
Myocardial ischemia and hyperkalaemia

C
Cardiac arrhythmia and hypokalaemia

D
Coronary artery disease and rheumatic fever.

Solution

A long PR intetval (of over 200ms) indicates a slowing of conduction between the atria and ventricle, usually due to slow conduction through the atrioventicular node or AV node. Prolonged PR can signify conduction on problems related to serious condition such as coronary artery disease (i.e heart attack). Even heart valves can be inflamed and become scarred over time(rheumatic fever)
So the correct answer will be option D.
Question 6
1 / -0

What is true of blood group B

A
The person can form antibody b

B
The person cannot form antibody b

C
The person cannot be given blood of 'O' group

D
The person can receive blood of AB group.
Question 7
1 / -0

Most of body cells are surrounded by

A
Water

B
Interstitial fluid

C
Blood

D
Mineral solution equivalent to sea water.

Solution

All the fluids outside the cells are called the extracellular fluid, which is mainly present as interstitial fluid and plasma. This fluid surrounds each cell.
So the correct answer will be option B.
Question 8
1 / -0

Thrombokinase is associated with

A
Elimination of area and other excretory products from the body

B
Production of erythrocytes from the bone marrow

C
Pulmonary and systemic circulation

D
Cardiac cycle and its regulation

E
Enzymatic reactions in coagulation of blood.

Solution

Thrombokinase is a protein enzyme which is especially found in blood platelets and take part in conversion of prothombin to thrombin in coagulation of blood.
So the correct answer will be option E.
Question 9
1 / -0

What does P-wave represent in ECG?

A
End of systole

B
Contraction of both atria

C
Initiation of ventricular contraction

D
Beginning of systole
Solution
In an ECG, there are five consecutive waves: P, Q, R, S and T.
- P wave represents atrial depolarisation which leads to contraction of both atria.
- QRS complex represents ventricular depolarisation which initiates contraction of ventricles.
- T wave represents ventricular repolarisation. It represents the return of ventricles from excited state to normal state.
So, the correct answer is 'Contraction of both atria'.
Question 10
1 / -0

Identify the correct statement regarding cardiac activity.

A
Normal activities of the human heart is regulated intrinsically, hence it is neurogenic.

B
A special neural centre in the medulla oblongata can moderate the cardiac function through CNS.

C
Parasympathetic neural signals increase the rate of heart beat.

D
Adrenal medullary hormones can increase cardiac output.

E
The end of the T-wave marks the end of diastole.

Solution

A. Normal activities of human heart are regulated intrinsically and hence it is myogenic which means that impulses for contraction are originated in the muscles itself.
B. A special neural centre in the medulla oblongata called cardiovascular centre, can moderate the cardiac functions through ANS (Autonomous nervous system).
C. Sympathetic neural signals increase the rate of heart beat due to secretion of adrenaline from adrenal medulla which activates sympathetic nervous system.
D. Adrenal medulla secrete adrenaline and nor adrenaline hormones which can increase cardiac output because they increase heart beat and strength of heart contraction.
E. The end of T wave marks the end of systole. T wave in ECG represents ventricular repolarisation.
Hence, statement D is correct.
So, the correct answer is 'Adrenal medullary hormones can increase cardiac output'.

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Body Fluids and Circulation Test - 52

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Body Fluids and Circulation Test - 52

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Question 1

Basophil

Eosinophil

Lymphocyte

Neutrophil

Solution

Question 2

Birds and amphibians

Birds and mammals

Fishes and amphibians

Amphibians and reptiles.

Solution

Question 3

Antihaemophiliac factor (VIII)

Christmas factor (IX)

Stuart-Prower factor (X)

Hageman's factor (XII).

Question 4

P-wave

Q-wave

T-wave

QRS complex.

Question 5

Hyperkalaemia and hypokalaemia

Myocardial ischemia and hyperkalaemia

Cardiac arrhythmia and hypokalaemia

Coronary artery disease and rheumatic fever.

Solution

Question 6

The person can form antibody b

The person cannot form antibody b

The person cannot be given blood of 'O' group

The person can receive blood of AB group.

Question 7

Water

Interstitial fluid

Blood

Mineral solution equivalent to sea water.

Solution

Question 8

Elimination of area and other excretory products from the body

Production of erythrocytes from the bone marrow

Pulmonary and systemic circulation

Cardiac cycle and its regulation

Enzymatic reactions in coagulation of blood.

Solution

Question 9

End of systole

Contraction of both atria

Initiation of ventricular contraction

Beginning of systole

Solution

Question 10

Normal activities of the human heart is regulated intrinsically, hence it is neurogenic.

A special neural centre in the medulla oblongata can moderate the cardiac function through CNS.

Parasympathetic neural signals increase the rate of heart beat.

Adrenal medullary hormones can increase cardiac output.

The end of the T-wave marks the end of diastole.

Solution

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