Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 58

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Weekly Quiz Competition

Question 1
1 / -0

Choose the correct answer from the alternatives given.
Capillaries are structurally suited for the exchange of substances because:

A
their walls are composed of only one layer of squamous cells

B
velocity of blood flow is slow

C
they form networks that increase the surface area for diffusion

D
all of the above

Solution

Capillaries are any of the minute blood vessels that form networks throughout the bodily tissues; it is through the capillaries that oxygen, nutrients, and wastes are exchanged between the blood and the tissues. The velocity of blood is slowest as it reaches capillaries making the easy exchange of substances. Their minimal thickness because of their single layer of squamous cells also helps in this.
So, the correct option is 'their walls are composed of only one layer of squamous cells'.
Question 2
1 / -0

Which of the following statements is not true?

A
A heart murmur usually indicates a fatal heart defect

B
Angina pectoris may occur when doing strenuous activity after eating a heavy meal

C
An incompetent valve can permit a backflow of blood

D
A coronary artery spasm can cause an obstruction of blood flow

Solution

A person with light murmur has a normal heart, an abnormal heart murmur is more serious, while angina pectoris is a type of chest pain caused by reduced blood flow to the heart.
So, the correct option is 'A heart murmur usually indicates a fatal heart defect'.
Question 3
1 / -0

Choose the correct answer from the alternatives given.
The __ produces white blood cells, which function in __ and __.

A
liver; oxygen transport; defense

B
lymph nodes; oxygen transport; pH stabilization

C
bone marrow; housekeeping; defense

D
bone marrow; PH stabilization; defense

Solution

The bone marrow produces white blood cells which function in housekeeping and defense by fighting against the invading pathogens.
So, the correct option is 'bone marrow; housekeeping; defense'.
Question 4
1 / -0

A boy has the blood group AB. What is true of the inheritance of this blood group in his case?

A
His parents should be one with O group and the other with B group

B
His parents should be one with O group and the other with A group

C
Both his parents should be with B group

D
His father should be A group and mother with B group

Solution

Since the boy has AB blood group, that means he possesses A and B alleles that must be transmitted from his parents to the boy. That is only possible when one parent has A blood group while the other has B blood group.
So, the correct option is 'His father should be A group and mother with B group'. i.e option D
Question 5
1 / -0

ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.

A
Depolarisation of atria

B
Repolarisation of atria

C
Depolarisation of ventricles

D
Repolarisation of ventricles
Solution
Correct option: B
Explanation:
The P wave in ECG complex indicates atrial depolarization and the QRS is responsible for ventricular depolarization.
In ECG T wave is showing ventricular repolarization.
In ECG repolarization of atria didn't showing by any wave.
Question 6
1 / -0

Statement I: EEG is of immense diagnostic value in the cardiac disease
Statement II: Defects in cardiac functions can be reflected in changes in the pattern of electrical potentials recorded in the EEG

A
Statement - I is True, Statement - II is True, Statement - II is correct

B
Statement - I is True, Statement - II is True; Statement - II is NOT a correct explanation for the statement - I

C
Statement - I is True, Statement - II is false

D
Both the statements are false

Solution

Statement I, EEG is of immense diagnostic value in the cardiac disease, is true
Statement II, defects in cardiac functions can be reflected in changes in the pattern of electrical potentials recorded in the EEG, is also true.

Also, statement II is the correct reason for the statement I.
So, the correct answer is 'Statement - I is True, Statement - II is True, Statement - II is correct'.
Question 7
1 / -0

The cardiac impulse is intiated and conducted further upto ventricle. The correct sequence of conduction of impulse is

A
S A Node A V Node Purkinje fibres A V Bundle

B
S A Node Purkinje fibres A V Node A V Bundle

C
S A Node A V Node A V Bundle Purkinje fibres

D
S A Node Purkinje fibres A V Bundle A V Node

Solution

The cardiac impulse is the cardiac cycle which is repeated diastole or systole ( contraction or relaxation ) of the heart. It starts from the sinoatrial node to the atrioventricular node along the bundle of atrioventricular to the Purkinje fibres which generate a heartbeat. Sinoatrial node is around the wall of the right auricle near the opening of superior vena cava which starts the impulse.
So, the correct option is ' S A Node AV Node AV Bundle Purkinje fibres'.
Question 8
1 / -0

Which proteolytic enzyme induces lysis of fibrin during fibrinolysis?

A
Fibrin

B
Thrombin

C
Plasmin

D
Platelet factor VIII

Solution

Plasmin is the proteolytic enzyme that induces lysis of fibrin to fibrin degradation products during fibrinolysis (enzymatic breakdown of fibrin during blood clots)
So, the correct answer is 'Plasmin'
Question 9
1 / -0

Macrophages are derived from

A
Basophils

B
Monocytes

C
Neutrophils

D
Eosinophils

Solution

Macrophages are scavenging cells derived from monocytes and are found all over the body. These infiltrate the tissue during an inflammatory response.
So, the correct option is 'Monocytes'.
Question 10
1 / -0

Rh factor was discovered by

A
Landsteiner and Weiner

B
William Harvey

C
Malpighi

D
None of these

Solution

Rh factor is an independent antigen present on the RBC irrespective of the presence of Antigen A or B. This factor is passed down from genus Rhesus macaque (monkey) to humans and is regarded as the Rh factor it was discovered by Landsteiner and Weiner.
so, the correct answer is 'Landsteiner and Weiner'

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Body Fluids and Circulation Test - 58

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Body Fluids and Circulation Test - 58

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SHARING IS CARING

Question 1

their walls are composed of only one layer of squamous cells

velocity of blood flow is slow

they form networks that increase the surface area for diffusion

all of the above

Solution

Question 2

A heart murmur usually indicates a fatal heart defect

Angina pectoris may occur when doing strenuous activity after eating a heavy meal

An incompetent valve can permit a backflow of blood

A coronary artery spasm can cause an obstruction of blood flow

Solution

Question 3

liver; oxygen transport; defense

lymph nodes; oxygen transport; pH stabilization

bone marrow; housekeeping; defense

bone marrow; PH stabilization; defense

Solution

Question 4

His parents should be one with O group and the other with B group

His parents should be one with O group and the other with A group

Both his parents should be with B group

His father should be A group and mother with B group

Solution

Question 5

Depolarisation of atria

Repolarisation of atria

Depolarisation of ventricles

Repolarisation of ventricles

Solution

Question 6

Statement - I is True, Statement - II is True, Statement - II is correct

Statement - I is True, Statement - II is True; Statement - II is NOT a correct explanation for the statement - I

Statement - I is True, Statement - II is false

Both the statements are false

Solution

Question 7

S A Node A V Node Purkinje fibres A V Bundle

S A Node Purkinje fibres A V Node A V Bundle

S A Node A V Node A V Bundle Purkinje fibres

S A Node Purkinje fibres A V Bundle A V Node

Solution

Question 8

Fibrin

Thrombin

Plasmin

Platelet factor VIII

Solution

Question 9

Basophils

Monocytes

Neutrophils

Eosinophils

Solution

Question 10

Landsteiner and Weiner

William Harvey

Malpighi

None of these

Solution

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