Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 39

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Question 1
1 / -0

Wandering cells are:

A
Histiocytes

B
Mast cells

C
Leukocytes

D
All of the above

Solution

The term wandering cell (or ameboid cell) is used to describe cells that are found in connective tissue, but are not fixed in place. This term is used occasionally and usually refers to blood leukocytes (which are not fixed and organized in solid tissue) - in particular mononuclear phagocytes.

So, the correct answer is option C- 'Leukocytes'.
Question 2
1 / -0

Blood platelets are

A
Nucleated

B
Nucleus is many lobed

C
Nucleus is very small

D
Denucleated

Solution

Correct answer: D
Explanation:
• Platelets are not true cells; they are rather cell elements that are produced by fractionation of bone marrow megakaryocytes (MKs).
• Given that they are not cells, they are devoid of a nucleus and therefore do not contain nuclear DNA.
Hence, blood platelets are denucleated.
Question 3
1 / -0

Blood platelets are present in the blood of

A
Fishes

B
Amphibians

C
Reptiles

D
Mammals

Solution

The blood cells are of three major types they are erythrocytes(RBC), leucocytes(WBC) and platelets. Platelets or thrombocytes are cell fragments produced from megakaryocytes (special cells in the bone marrow).Blood normally contains 1,500,00 - 3,500,00 platelets mm – 3. Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood. Blood platelets are present in the blood of Mammals.
So, the correct answer is 'Mammals'.
Question 4
1 / -0

Number of RBC is more in people living on hills because __________________.

A
There is less oxygen

B
Air is more purified

C
Heat is required to warm the body

D
Oxygen concentration is more

Solution

As we move from low altitude to high altitude, the air starts getting thinner and thinner. The partial pressure of oxygen starts decreasing with increasing altitude. Now, since the partial pressure of oxygen is less in our lungs, the binding of oxygen to haemoglobin in RBCs also decreases.
So, the correct answer is option A.
Question 5
1 / -0

Haemorrhagic disorder occurs when the platelet count falls to less than ________________.

A
$$1,50,000/mm^3$$

B
$$1,00,000/mm^3$$

C
$$75,000/mm^3$$

D
$$50,000/mm^3$$

Solution

Hemorrhagic Disorders Spontaneous or near spontaneous bleeding caused by a defect in clotting mechanisms (blood coagulation disorders) or another abnormality causing a structural flaw in the blood vessels. Platelets play an important role in blood clotting, so thrombocytopenia puts you at higher risk of bleeding. Any time your platelet count drops below 50,000 per mm3 you are considered to be at increased risk for bleeding.

So, the correct answer is '50,000/mm3'.
Question 6
1 / -0

Instead of platelets, the non-mammals possess clotting factor in.

A
Nucleated cells called thrombocytes

B
RBC

C
WBC

D
Plasma

Solution

Only mammals have Platelets. Non-mammals possess thrombocytes which are nucleated cells which have been shown to have a haemostatic function paralleling that of mammalian platelets.

So, the correct answer is 'Nucleated cells called thrombocytes'.
Question 7
1 / -0

In man, the number of R.B.C. per cubic mm of blood is

A
$$1$$ to $$3$$ millions

B
$$5$$ to $$5.4$$ millions

C
Less than one million but more than 50,000

D
Less than 50,000

Solution

The blood cells are of three major types they are erythrocytes(RBC), leucocytes(WBC) and platelets. RBCs are the most abundant of all the cells in the blood. RBCs have an average lifespan of 120 days after which they are destroyed in the spleen (graveyard of RBCs). A healthy adult man has, on an average, 5 million to 5.4 millions of RBCs.
So, the correct answer is '5 to 5.4 millions'.
Question 8
1 / -0

Formation of platelets is known as

A
Haemopoiesis

B
Thrombopoiesis

C
Haemolysis

D
None of the above

Solution

Platelets or thrombocytes are cell fragments produced from megakaryocytes (special cells in the bone marrow). Formation of platelets by fragmentation of megakaryocytes in bone marrow is known as thrombopoiesis.
So, the correct answer is 'Thrombopoiesis'.
Question 9
1 / -0

The mineral found in red pigment of vertebrate blood is:

A
Magnesium

B
Iron

C
Calcium

D
Copper

Solution

The red pigment of vertebrate blood is hemoglobin. It is a conjugated protein, composed of a protein called globin and a $$Fe^{2+}$$ complex called heme. Thus, the mineral present in the red pigment (hemoglobin) of vertebrate blood is iron.

So, the correct answer is option B.
Question 10
1 / -0

Blood platelets are.

A
Nucleated cells

B
Non-nucleated cells

C
Non-nucleated cell fragments

D
Nucleated cell fragments

Solution

Correct answer: C
Explanation:
• Platelets are not true cells; they are rather cell elements that are produced by fractionation of bone marrow megakaryocytes (MKs).
• Given that they are not cells, they are devoid of a nucleus and therefore do not contain nuclear DNA.
Hence, blood platelets are non-nucleated cell fragments.

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Re-Attempt Weekly Quiz Competition

Body Fluids and Circulation Test - 39

Result

Body Fluids and Circulation Test - 39

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SHARING IS CARING

Question 1

Histiocytes

Mast cells

Leukocytes

All of the above

Solution

Question 2

Nucleated

Nucleus is many lobed

Nucleus is very small

Denucleated

Solution

Question 3

Fishes

Amphibians

Reptiles

Mammals

Solution

Question 4

There is less oxygen

Air is more purified

Heat is required to warm the body

Oxygen concentration is more

Solution

Question 5

$$1,50,000/mm^3$$

$$1,00,000/mm^3$$

$$75,000/mm^3$$

$$50,000/mm^3$$

Solution

Question 6

Nucleated cells called thrombocytes

RBC

WBC

Plasma

Solution

Question 7

$$1$$ to $$3$$ millions

$$5$$ to $$5.4$$ millions

Less than one million but more than 50,000

Less than 50,000

Solution

Question 8

Haemopoiesis

Thrombopoiesis

Haemolysis

None of the above

Solution

Question 9

Magnesium

Iron

Calcium

Copper

Solution

Question 10

Nucleated cells

Non-nucleated cells

Non-nucleated cell fragments

Nucleated cell fragments

Solution

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