Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 11

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Weekly Quiz Competition

Question 1
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Which of the following statements is correct with reference to the circulation of blood in a mammal?

A
The left atrium receives oxygenated blood from the lungs.

B
The pulmonary artery returns oxygenated blood from the lungs to the left atrium.

C
The pulmonary vein carries deoxygenated blood from right ventricle to the lungs.

D
The deoxygenated blood is returned to the left atrium.

Solution

The left atrium receives oxygenated blood from the lungs through the pulmonary vein. It is the only vein in the human body that carries oxygenated blood.
The pulmonary artery carries deoxygenated blood to the lungs for oxygenation.
Deoxygenated blood is returned to the right atrium.
Thus, the correct answer is option A.
Question 2
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The blood vascular system of mammals is known as the double vascular system because:

A
A group of arteries carries oxygenated and other groups of veins conduct deoxygenated blood.

B
Oxygenated blood runs from the heart to different organs by one set of arteries while deoxygenated blood runs from the heart to lung by pulmonary artery.

C
The two different systems never meet.

D
All of the above

Solution

Double circulation in a four chambered heart means that there are two circulations acting together in the cardio-respiratory system simultaneously. One circulation, is from the right ventricle to the lungs and back to the left atrium for oxygenation of the blood. The other circulation is from the left ventricle to the entire systemic circulation and back to the right atrium (oxygenated blood). In normal cases, the oxygenated and the de-oxygenated systems never mix.
So, the correct answer is option D.
Question 3
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Which among the following is not found in mammals?

A
Hepatic portal system

B
Hypophyseal portal system

C
Renal portal system

D
Hepatic and hypophyseal portal system

Solution

Renal portal system is an arterial portal system, in which blood from the posterior body enters and pass on to the caudal venacava. It is present in non-mammals like fishes, reptiles, bird and amphibians.
Mammals possess hepatic portal system and hypophyseal portal system.
Thus, the correct answer is C.
Question 4
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In order for the blood to flow from right ventricle to left ventricle in mammalian heart, it must flow through

A
Right ventricle, pulmonary arteries, lungs, pulmonary veins and left atrium

B
Right ventricle, pulmonary arteries, lungs, pulmonary arteries and left atrium

C
Right ventricle, right atrium, lungs, pulmonary veins and left atrium

D
Right ventricle, systemic aorta, lungs, pulmonary veins and left atrium

Solution

The deoxygenated blood moves from the right ventricle to the lungs through the pulmonary artery. The oxygenated blood from lungs flows back to the left auricle through pulmonary vein. Then, by auricular contraction, oxygenated blood reaches the left ventricle.
Question 5
1 / -0

Tissue plasminogen activator

A
Helps in wound healing

B
Dissolves clot in blood vessels of heart

C
Allergy response

D
None of the above

Solution

Tissue plasminogen activator is an enzyme that is used to breakdown the blood clots in the blood vessels of the heart. It acts as a catalyst to convert plasminogen to plasmin which is the major enzyme responsible for clot breakdown.
So, the correct answer is 'Dissolves clot in blood vessels of heart'
Question 6
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Mammals are said to have a "double circulatory system". This means

A
That the blood vessels are paired.

B
That there are two types of blood vessels attached to every organ; an artery and a vein.

C
That there are two system; one from the heart to the lungs and back to the heart and other to and from rest of the body.

D
That the blood circulates twice as quickly.

Solution

The mammalian heart has double circulatory system. One system is the heart - lung - heart circulation. It carries deoxygenated blood to lungs for oxygenation. The other system is heart- body- heart circulation. Here, the oxygenated blood reaches the entire body and deoxygenated blood is brought back to the heart.
Question 7
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Lymph is colourless due to the:

A
Absence of WBC

B
Presence of WBC

C
Absence of platelets

D
Absence of RBC

Solution

Lymph is a clear watery fluid that appears colourless. This is because it lacks red blood cells (erythrocytes). It consists of plasma and white blood cells (leucocytes) only.
So, the correct answer is option D.
Question 8
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Fastest distribution of some injectible material/medicine and with no risk of any kind, can be achieved by injecting it into the

A
Muscles

B
Arteries

C
Veins

D
Lymph vessels

Solution

Intravenous injection is favoured as the full effects of the drug are experienced very quickly, in five to ten seconds. It also bypasses first-pass metabolism in the liver, resulting in a higher bioavailability for drugs than oral ingestion. So users get a stronger effect from the same amount of the drug. Intramuscular injections are more painful and drug absorption is variable and unpredictable.
So, the correct answer is 'Veins'
Question 9
1 / -0

P-wave of ECG occurs before the

A
Onset of ventricular ejection

B
End of arterial contraction

C
Beginning of atrial contraction

D
None of the above

Solution

Atrial systole, normally occurs before ventricular systole, and is indicated electrically by the P wave on the ECG.
Question 10
1 / -0

The first negative wave in ECG is:

A
P

B
Q

C
R

D
T
Solution
- The waves represent the flow of energy between two electrodes.
- Depending on which lead the ECG is viewed, it will determine whether the wave is negative or positive.
- The first deflection is the P wave associated with right and left atrial depolarization. It is a very minimal deflection from the baseline which is hardly detected.
- The first negative deflection is the Q wave. Normal Q waves represent septal depolarization.
- The first positive deflection is termed an R wave. The R wave represents depolarization of the left ventricular myocardium.
- T wave represents repolarization of ventricles. It is a positive deflection.
So, the correct answer is 'Q'.

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Body Fluids and Circulation Test - 11

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Body Fluids and Circulation Test - 11

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Question 1

The left atrium receives oxygenated blood from the lungs.

The pulmonary artery returns oxygenated blood from the lungs to the left atrium.

The pulmonary vein carries deoxygenated blood from right ventricle to the lungs.

The deoxygenated blood is returned to the left atrium.

Solution

Question 2

A group of arteries carries oxygenated and other groups of veins conduct deoxygenated blood.

Oxygenated blood runs from the heart to different organs by one set of arteries while deoxygenated blood runs from the heart to lung by pulmonary artery.

The two different systems never meet.

All of the above

Solution

Question 3

Hepatic portal system

Hypophyseal portal system

Renal portal system

Hepatic and hypophyseal portal system

Solution

Question 4

Right ventricle, pulmonary arteries, lungs, pulmonary veins and left atrium

Right ventricle, pulmonary arteries, lungs, pulmonary arteries and left atrium

Right ventricle, right atrium, lungs, pulmonary veins and left atrium

Right ventricle, systemic aorta, lungs, pulmonary veins and left atrium

Solution

Question 5

Helps in wound healing

Dissolves clot in blood vessels of heart

Allergy response

None of the above

Solution

Question 6

That the blood vessels are paired.

That there are two types of blood vessels attached to every organ; an artery and a vein.

That there are two system; one from the heart to the lungs and back to the heart and other to and from rest of the body.

That the blood circulates twice as quickly.

Solution

Question 7

Absence of WBC

Presence of WBC

Absence of platelets

Absence of RBC

Solution

Question 8

Muscles

Arteries

Veins

Lymph vessels

Solution

Question 9

Onset of ventricular ejection

End of arterial contraction

Beginning of atrial contraction

None of the above

Solution

Question 10

P

Q

R

T

Solution

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