Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 32

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Question 1
1 / -0

What happens when a clot occurs in an undamaged blood vessel?

A
The person would bleed to death.

B
A scab will form on the skin surface.

C
Platelets stick to the edges of the cut and to one another, forming a plug.

D
The flow of blood to tissues beyond the clot may be cut off.

Solution

When a clot occurs in an undamaged blood vessel, It stops the flow of blood to the rest of the tissue beyond the clot as, the blood can't flow through the clot. It causes paralysis in most of the cases.
Therefore, the correct answer is option D.
Question 2
1 / -0

Read the statements given below and choose the correct sequence of events leading the formation of a blood clot.
(i) Calcium activates an enzyme.
(ii) Fibrin binds platelets to form a 'plug'.
(iii) Thrombin converts fibrinogen to fibrin.
(iv) Platelets and damaged cells release an activator.

A
(i), (ii), (iii), (iv)

B
(ii), (i), (iii), (iv)

C
(iii), (iv), (i), (ii)

D
(iv), (i), (iii), (ii)

Solution

The process of blood clotting starts with the release of thromboplastin from damaged cells and platelets. Thromboplastin converts plasma protein prothrombin into thrombin in the presence of calcium ions. Thrombin then converts soluble plasma protein fibrinogen into fibrin which binds platelets to form a clot.
Therefore, the correct answer is option D.
Question 3
1 / -0

When the right ventricle of heart contracts, the blood is supplied to

A
All parts of the body

B
Pulmonary veins

C
Aorta

D
Lungs

Solution

The right ventricle receives deoxygenated blood from the right atrium via the tricuspid valve and pumps it into the lungs by the pulmonary artery via the pulmonary valve, into the pulmonary circulation.
So, the correct answer is option D.
Question 4
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The English physician, William Harvey ........ discovered the circulation of blood.

A
A.D. 1578 -1656

B
A.D. 1578 -1658

C
A.D. 1578 -1657

D
A.D. 1578 -1660

Solution

William Harvey made the momentous medical discovery that the flow of blood must be continuous and that its flow must be in one direction only. This discovery sealed his place in the history of medicine. William Harvey was born in 1578 in Folkestone, Kent. Harvey studied at Caius College, Cambridge before he enrolled at the University of Padua in 1598. At the time when Harvey was a student at Padua, Galileo was a tutor there and there is little doubt that he was highly influenced by the Galilean way of thinking that enthused the university as a whole. Harvey learned about the human body by dissection and anatomical observation. William Harvey was expired in 1657. Therefore, the correct answer is option C.
Question 5
1 / -0

Which one of the following is wrong?

A
White blood cells or leucocytes are considered as 'soldiers' of the body.

B
Antibodies are product by the stem cells of bone marrow.

C
Calcium ions in blood play an important role in blood clot formation.

D
Blood platelets are cell fragments, devoid of nuclei and participate in the coagulation of blood.

Solution

An antibody is a large, Y-shaped protein produced by the plasma cells that is used by the immune system to identify and neutralize pathogens such as bacteria and viruses. The antibody recognizes a unique molecule of the harmful agent (antigen), via the variable region. They are not formed by the stem cells. All the other statements are correct.
Therefore, the correct answer is option B.
Question 6
1 / -0

The vitamin essential for the synthesis of prothrombin is

A
Vitamin K

B
Vitamin E

C
Vitamin A

D
Vitamin D

Solution

Prothrombin is a precursor of the clotting factor thrombin. Prothrombin forms thrombin in the cascade clotting reaction. It is produced in the liver cells in the presence of vitamin K.
Question 7
1 / -0

In human, the prothrombin required for blood clotting is produced inside the

A
Liver

B
Blood

C
Bone

D
Spleen

Solution

Prothrombin is a coagulation or clotting factor that is needed for the normal clotting of blood. A cascade of biochemical events leads to the formation of the final clot. In this cascade, prothrombin is a precursor to thrombin.
Prothrombin is produced in the liver and is modified in the presence of vitamin K.
Therefore, the correct answer is option A.
Question 8
1 / -0

In a closed circulatory system, blood is completely enclosed within the:

A
Skeleton

B
Sinuses

C
Vessels

D
Heart

Solution

The closed circulatory system is where the blood flows into specialized blood vessels such as arteries, veins and capillaries. In the closed circulatory system, the blood never comes out in direct contact with the tissues. For example, human being, dogs, rat, etc.
So, the correct answer is option C.
Question 9
1 / -0

Which enzyme induces lysis of fibrinogen to fibrin during fibrinolysis?

A
Plasmin

B
Thrombin

C
Fibrin

D
Trypsin

Solution

Blood-clotting proteins circulate in the blood plasma in an inactive form, poised to participate in blood coagulation upon tissue injury. Blood-clotting proteins generate thrombin, an enzyme that converts fibrinogen to fibrin, and a reaction that leads to the formation of a fibrin clot.
Therefore, the correct answer is option B.
Question 10
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What is interstitial fluid?

A
Fluid which removes waste

B
Fluid which dissolves nutrients

C
Fluid which occupies spaces between the cells

D
All of the above

Solution

Interstitial fluid is the fluid that occupies the spaces between the cells and constitutes their immediate environment. As the blood and the surrounding cells continually add and remove substances from the interstitial fluid, its composition changes continuously.
Therefore, the correct answer is option C.

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Body Fluids and Circulation Test - 32

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Body Fluids and Circulation Test - 32

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Question 1

The person would bleed to death.

A scab will form on the skin surface.

Platelets stick to the edges of the cut and to one another, forming a plug.

The flow of blood to tissues beyond the clot may be cut off.

Solution

Question 2

(i), (ii), (iii), (iv)

(ii), (i), (iii), (iv)

(iii), (iv), (i), (ii)

(iv), (i), (iii), (ii)

Solution

Question 3

All parts of the body

Pulmonary veins

Aorta

Lungs

Solution

Question 4

A.D. 1578 -1656

A.D. 1578 -1658

A.D. 1578 -1657

A.D. 1578 -1660

Solution

Question 5

White blood cells or leucocytes are considered as 'soldiers' of the body.

Antibodies are product by the stem cells of bone marrow.

Calcium ions in blood play an important role in blood clot formation.

Blood platelets are cell fragments, devoid of nuclei and participate in the coagulation of blood.

Solution

Question 6

Vitamin K

Vitamin E

Vitamin A

Vitamin D

Solution

Question 7

Liver

Blood

Bone

Spleen

Solution

Question 8

Skeleton

Sinuses

Vessels

Heart

Solution

Question 9

Plasmin

Thrombin

Fibrin

Trypsin

Solution

Question 10

Fluid which removes waste

Fluid which dissolves nutrients

Fluid which occupies spaces between the cells

All of the above

Solution

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