Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 9

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Question 1
1 / -0

What is the function of blood vessels?

A
They pump blood to heart

B
They filter impurities from the blood

C
They carry blood to all parts of the body

D
They carry messages from brain to muscles
Solution
- Blood vessels are tubes that carry blood to all parts of the body. They are of three types- arteries, veins, and capillaries.
- Arteries carry blood away from the heart, veins bring blood towards the heart while capillaries are responsible for the actual exchange of materials between blood and tissues.
- So, the correct answer is option C.
Question 2
1 / -0

Which of the following does not help in clotting of blood?

A
Heparin

B
Prothrombin

C
Ca$$^{2+}$$

D
Exposure to O$$_2$$

Solution

Heparin does not help in clotting of blood. Heparin is a naturally occurring anticoagulant produced by basophils and mast cells. Heparin acts as an anticoagulant, preventing the formation of clots and extension of existing clots within the blood.
Question 3
1 / -0

Lymph contains ........... proteins than plasma.

A
Less

B
More

C
Equal

D
None of the above

Solution

The lymphatic system returns excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 percent is returned. The 10 percent that does not return becomes part of the interstitial fluid that surrounds the tissue cells. It helps in exchange of gasses, nutrients and removes the metabolic waste. It is devoid of RBC. It contains fewer proteins than plasma and lacks RBC. So, the correct answer is option A.
Question 4
1 / -0

Blood clotting involves the conversion of

A
Prothrombin to thromboplastin

B
Thromoboplastin to prothrombin

C
Fibrinogen to fibrin

D
Fibrin to fibrinogen

Solution

A wound stimulates the platelets in the blood to release blood coagulating factors to initiate the mechanism of coagulation.
1. Platelets release the plasma protein thromboplastin.
2. Thromboplastin converts prothrombin, which is also a plasma protein into the enzyme thrombin.
3. Thrombin converts fibrinogen into fibrin.
4. Fibrin is insoluble protein and forms the threads that bind the clot.
Blood clotting prevents the excessive loss of blood from the body.
Thus, the correct answer is option C.
Question 5
1 / -0

Blood platelets occur in the blood of ____________.

A
Birds

B
Mammals

C
Reptiles

D
Amphibians

Solution

Only mammals have platelets, tiny cells without nuclei that are responsible for plugging the leaks in the blood vessels. Other animals use more conventional systems of hemostasis. Some marine invertebrates have a single type of blood cell, responsible for hemostasis, but also for other types of defences. Non-mammalian vertebrates have specialized nucleated thrombocytes to do the job.

So, the correct answer is 'Mammals'.
Question 6
1 / -0

Left auricle recieves pure blood from the :

A
Pulmonary veins

B
Pulmonary artery

C
Superior vena cava

D
Inferior vana cava

Solution

Blood enters the heart through the inferior and superior vena cava, emptying deoxygented blood from the body into the right atrium.
As the atrium contracts, blood flows via the tricuspid valve into the right ventricle. As the ventricle contracts, blood leaves the heart into the pulmonary artery and to the lungs where it is oxygenated.
Two pulmonary veins from each lung carry oxygenated blood back to the left atrium.
As the atrium contracts, blood flows from the left atrium into the left ventricle. As the ventricle contracts, blood leaves the heart through the aorta to different body parts.
So, the answer is A.
Question 7
1 / -0

Blood clotting vitamin is?

A
A

B
$$B_6$$

C
$$B_{12}$$

D
K

Solution

Vitamin K plays a key role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2

So, the correct answer is 'K'.
Question 8
1 / -0

Name of cells which help in clotting of blood in mammals ____________.

A
Platelets

B
Thrombocytes

C
Lymphocytes

D
Monocytes

Solution

Platelet, also called thrombocyte, colourless, nonnucleated blood component that is important in the formation of blood clots (coagulation). Platelets are found only in the blood of mammals.

So, the correct answer is 'Platelets'.
Question 9
1 / -0

Which of the following are required for blood clotting?

A
$$K^+$$, thromboplastin

B
$$Ca ^{2+}$$, thromboplastin

C
$$Na^+$$, $$Ca ^{2+}$$

D
$$K ^{+}$$, prothrombin

Solution

At the site of injury, the ruptured tissue cells release thromboplastin/thrombokinase/Factor X which acts as an enzyme with $$Ca^+$$ which converts prothrombin (inactive) into thrombin (active). Thrombin converts soluble fibrinogen into insoluble fibrin which forms a mesh-like structure to trap the blood cells forming a clot.
Question 10
1 / -0

Platelets are a source of ______________.

A
Fibrinogen

B
Calcium

C
Thromboplastin

D
Haemoglobin

Solution

Thromboplastin is a plasma protein aiding blood coagulation through catalyzing the conversion of prothrombin to thrombin. It is a complex enzyme that is found in brain, lung, and other tissues and especially in blood platelets and that functions in the conversion of prothrombin to thrombin in the clotting of blood—called also thrombokinase.

So, the correct answer is 'Thromboplastin'.

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Body Fluids and Circulation Test - 9

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Body Fluids and Circulation Test - 9

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SHARING IS CARING

Question 1

They pump blood to heart

They filter impurities from the blood

They carry blood to all parts of the body

They carry messages from brain to muscles

Solution

Question 2

Heparin

Prothrombin

Ca$$^{2+}$$

Exposure to O$$_2$$

Solution

Question 3

Less

More

Equal

None of the above

Solution

Question 4

Prothrombin to thromboplastin

Thromoboplastin to prothrombin

Fibrinogen to fibrin

Fibrin to fibrinogen

Solution

Question 5

Birds

Mammals

Reptiles

Amphibians

Solution

Question 6

Pulmonary veins

Pulmonary artery

Superior vena cava

Inferior vana cava

Solution

Question 7

A

$$B_6$$

$$B_{12}$$

K

Solution

Question 8

Platelets

Thrombocytes

Lymphocytes

Monocytes

Solution

Question 9

$$K^+$$, thromboplastin

$$Ca ^{2+}$$, thromboplastin

$$Na^+$$, $$Ca ^{2+}$$

$$K ^{+}$$, prothrombin

Solution

Question 10

Fibrinogen

Calcium

Thromboplastin

Haemoglobin

Solution

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