Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 60

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Weekly Quiz Competition

Question 1
1 / -0

In humans, blood passes from the vena cava to the diastolic right atrium of heart due to

A
Stimulation of the SA node

B
Pressure difference between the vena cava and the atrium

C
Pushing open of the venous valves

D
Suction pull

Solution

B. Pressure difference between the vena cava and the atrium
Reason: Blood passes from the superior and inferior vena cava into the right atrium. During this phase start of diastole, the pressure drops in the right atrium. Thereby forcing the blood from vena cava to enter the right atrium. During diastole as the atrium relaxes and enlarges in size and then the pressure falls.
Question 2
1 / -0

Which of the following statements is/are incorrect about lymph?
(i) Lymph is colourful as it has haemoglobin but no RBC.
(ii) It contains specialized lymphocytes which are responsible for the immunity of the body.
(iii) Lymph is an important carrier for nutrients and hormones.
(iv) Fats are absorbed through lymph in the lacteals present in the intestinal villi.

A
i only

B
iii and iv

C
ii and iii

D
iv only

Solution

Lymph is colourless as it does not contain RBC, in higher animals the respiratory pigment haemoglobin is contained only in the RBC. Lymph transports from tissues to veins by a system of vessels by the lymphatic system.
So, the correct answer is 'i only'.
Question 3
1 / -0

Select the correct option regarding the given figure:

A
D is eosinophil which is found more in asthma patients.

B
B is lymphocyte which helps in blood clotting.

C
C is neutrophil which is phagocytic in nature

D
A is monocyte which releases histamine, serotonin and heparin.

Solution

"C" has a multilobed nucleus - so it represents neutrophils which are phagocytic in nature as they destroy the foreign organism entering the body.
"A" is having a bilobed nucleus so it represents eosinophils.
"B" is having a large kidney-shaped nucleus so it represents monocytes.
"D" is having a non-lobulated, round nucleus so it represents lymphocytes.
Thus, the correct answer is 'C is neutrophil which is phagocytic in nature.'
Question 4
1 / -0

In order for the blood to flow from right atrium to left ventricle in mammalian heart, it must flow through

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

B
Right ventricle, pulmonary veins, lungs , pulmonary anteries, left atrium

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

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

Solution

The right atrium receives deoxygenated blood from superior and inferior venacava, this blood is poured into the right ventricle, from the right ventricle it is transported to the lungs via the pulmonary arteries, the blood is oxygenated in the lungs, this blood is received by the left auricle through the pulmonary veins, from here the blood is poured into the left ventricle.
So, the correct answer is 'Right ventricle, pulmonary arteries, lungs , pulmonary veins, left atrium'
Question 5
1 / -0

During the process of blood coagulation, vitamin k helps in

A
The formation of thromboplastin

B
The conversion of fibrinogen to fibrin

C
The conversion of prothrombin to thrombin

D
The formation of prothrombin

Solution

Vitamin K helps in the synthesis of prothrombin in the liver.
So, the correct answer is 'The formation of prothrombin'
Question 6
1 / -0

Characteristic features of different blood vessels in the body are shown. What does P,Q and R represent?

A
P: Total area Q: Velocity R:Blood pressure

B
P: Blood pressure Q: Velocity R: Total area

C
P: Velocity Q: Total area R: Blood pressure

D
P: Total area Q: Blood Pressure R: Velocity

Solution

The total cross- sectional area of the body's capillary beds is far greater than any other type of vessel. The diameter of an individual capillary is significantly smaller than the diameter of an arteriole.
The blood pressure drops as blood travels from arteries to arterioles, capillaries, venules and veins and encounters greater resistance.
The velocity of blood flow decreases dramatically as the blood moves from arteries to arterioles to capillaries. This slow flow rate allows more time for exchange processes to occur.
So, the correct answer is 'P: Blood pressure Q: Velocity R: Total area'.
Question 7
1 / -0

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

A
S - start of systole

B
T - end of diastole

C
P - depolarisation of the atria

D
R - repolarisation of ventricle

Solution

C. P - depolarisation of the atria
Reason: P-wave is a small upward wave that represents electrical excitation or atrial depolarization which leads to contraction of both the atria (atrial contraction). The impulses of contraction start from the SA node spread throughout the atria. It is usually 0.08 to 0.1 seconds in duration.
Question 8
1 / -0

Which one of the following is incorrect for 'atherosclerosis'?

A
Constriction of arterial lumen reduces the blood flow

B
Loss of dilation ability of the arterial wall and its rupture

C
Cholesterol deposition at the inner wall of the artery

D
None of these

Solution

Atherosclerosis is a medical condition that in which the build-up of plaque in the arteries results in the narrowing of arteries. It is usually the result of cholesterol deposition in the inner wall of an artery. This condition involves the constriction of arterial lumen. It reduces the blood flow. It causes the loss of dilation ability of the arterial wall and often in its rupture.
Thus, the correct answer is 'None of these.'
Question 9
1 / -0

What is the nature of blood passing through blood vessels A, B, C and D respectively?

A
A - Deoxygenated, B - Oxygenated, C - Deoxygenated, D - Oxygenated

B
A - Deoxygenated, B - Deoxygenated, C - Oxygenated, D - Oxygenated

C
A - Oxygenated, B - Oxygenated, C - Deoxygenated, D - Deoxygenated

D
A - Oxygenated, B - Deoxygenated, C - Oxygenated, D - Deoxygenated

Solution

A. It represents the veins through which deoxygenated blood from the body is brought to the heart.
B. It represents the aorta or arterial network through which oxygenated blood is pumped to the body parts.
C. It represents the pulmonary artery that carries deoxygenated blood to the lungs to be oxidized.
D. It represents the pulmonary vein that carries oxygenated blood to the heart.
Thus, the correct answer is A.
Question 10
1 / -0

Carotid artery supplies

A
Oxygenated blood to lungs

B
Oxygenated blood to intestine

C
Oxygenated blood to brain

D
None of these
Solution
The carotid arteries are major blood vessels in the neck that supply blood to the brain, neck, and face. There are two carotid arteries, one on the right and one on the left. In the neck, each carotid artery branches into two divisions:
The internal carotid artery supplies blood to the brain.
The external carotid artery supplies blood to the face and neck.
So, the correct answer is 'Oxygenated blood to brain'.

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Re-Attempt Weekly Quiz Competition

Body Fluids and Circulation Test - 60

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Body Fluids and Circulation Test - 60

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SHARING IS CARING

Question 1

Stimulation of the SA node

Pressure difference between the vena cava and the atrium

Pushing open of the venous valves

Suction pull

Solution

Question 2

i only

iii and iv

ii and iii

iv only

Solution

Question 3

D is eosinophil which is found more in asthma patients.

B is lymphocyte which helps in blood clotting.

C is neutrophil which is phagocytic in nature

A is monocyte which releases histamine, serotonin and heparin.

Solution

Question 4

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

Right ventricle, pulmonary veins, lungs , pulmonary anteries, left atrium

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

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

Solution

Question 5

The formation of thromboplastin

The conversion of fibrinogen to fibrin

The conversion of prothrombin to thrombin

The formation of prothrombin

Solution

Question 6

P: Total area Q: Velocity R:Blood pressure

P: Blood pressure Q: Velocity R: Total area

P: Velocity Q: Total area R: Blood pressure

P: Total area Q: Blood Pressure R: Velocity

Solution

Question 7

S - start of systole

T - end of diastole

P - depolarisation of the atria

R - repolarisation of ventricle

Solution

Question 8

Constriction of arterial lumen reduces the blood flow

Loss of dilation ability of the arterial wall and its rupture

Cholesterol deposition at the inner wall of the artery

None of these

Solution

Question 9

A - Deoxygenated, B - Oxygenated, C - Deoxygenated, D - Oxygenated

A - Deoxygenated, B - Deoxygenated, C - Oxygenated, D - Oxygenated

A - Oxygenated, B - Oxygenated, C - Deoxygenated, D - Deoxygenated

A - Oxygenated, B - Deoxygenated, C - Oxygenated, D - Deoxygenated

Solution

Question 10

Oxygenated blood to lungs

Oxygenated blood to intestine

Oxygenated blood to brain

None of these

Solution

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