Body Fluids and Circulation Test

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Body Fluids and Circulation Test - 73

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Weekly Quiz Competition

Question 1
1 / -0

A mature human erythrocyte has the typical characteristic of

A
A eukaryotic cell

B
A prokaryotic cell

C
Both eukaryotic and prokaryotic cell

D
Neither eukaryotic nor prokaryotic cell

Solution

Mature human erythrocytes are eukaryotic cells, which have lost their nucleus and organelles. Initially, the RBCs have nucleus but lose it with maturation. Prokaryotic cells include bacteria and archaea bacteria. Prokaryotes are exclusively unicellular with a naked DNA, while erythrocytes (RBCs) are part of a multicellular organism. All eukaryotic cell has a nucleus, but RBC doesn't. So, they have properties of neither prokaryotes nor eukaryotes.
Question 2
1 / -0

Mineral which helps in formation of RBCs is

A
Fe (iron)

B
Mn (manganese)

C
Mg (magnesium)

D
K (potassium)

Solution

A mineral which helps in the formation of RBCs is iron (Fe) because iron makes up the active part of haemoglobin which directly binds to and carries oxygen. If we don’t eat enough iron, we cannot produce enough haemoglobin to make functional red blood cells. Hence the correct option is A.
Question 3
1 / -0

Blood doesn't clot in the absence of vitamin K because it is

A
An essential component of the clot

B
An essential component of the platelets

C
Essential for synthesis of prothrombin

D
Essential for synthesis of fibrinogen

Solution

Blood clotting factors are needed for blood to clot (coagulation). Prothrombin, or factor II, is one of the clotting factors made by the liver. Vitamin K is needed to make prothrombin and other clotting factors. So, blood does not clot in the absence of Vitamin K because it is essential for the synthesis of prothrombin and not because it is an essential component of the clot, platelets or essential for fibrinogen.
Thus, the correct answer is option C.
Question 4
1 / -0

Which one is not the use of hepatic portal system?

A
To convert carbohydrate into glycogen.

B
To separate ammonia.

C
To kill bacteria.

D
To convert protein into carbohydrate.

Solution

The hepatic portal system is the system of blood vessels that connect the gastrointestinal system and the liver. The nutrients digested by the intestines are transported to the liver, where the excess of carbohydrates is converted into glycogen. The amino acids are broken down and ammonia is released, which is soon converted to urea through the Ornithine cycle. The liver has Kupffer cells that kill the bacteria before the nutrients move out to the different organs of the body.

Hence, the correct answer is 'To convert proteins into carbohydrates'
Question 5
1 / -0

The given diagram shows a section through the human heart.
Identify the correct valve action and vessel through which blood passes to the lungs.

A
b closes 3

B
b opens 4

C
a closes 2

D
a opens 1

Solution

The tricuspid valve (a) is in the right side of the heart, between the right atrium and the right ventricle. The pulmonary valve is in the right side of the heart, between the right ventricle and the entrance to the pulmonary artery. The artery carries blood from the heart to the lungs. The mitral valve (b) is in the left side of the heart, between the left atrium and the left ventricle. When deoxygenated blood flows from the right ventricle through the pulmonary artery to the lungs, the tricuspid valve closes and the pulmonary valve opens.
So, the correct answer is option C.
Question 6
1 / -0

Life span of blood platelets in mammals is about _______.

A
3 days

B
8 days

C
1 month

D
20 days

Solution

Platelets are the smallest of the three major types of blood cells. Platelets are anuclear cytoplasmic fragments essential for blood clotting and wound healing. Blood platelets begin their lives as hematocytoblasts, or stem cells. Blood platelets have a life span of 8-10 days, at the end of which they undergo programmed cell death or apoptosis.
Hence, answer is '8 days'.
Question 7
1 / -0

Which of the following vessels contains oxygenated blood?

A
Hepatic veins

B
Pulmonary vein

C
Hypophyseal portal vein

D
Renal vein

Solution

Pulmonary vein carries oxygenated blood from the lungs to the left atrium. It is the only vein in the human body that carries oxygenated blood. So, the correct answer is option B.
Question 8
1 / -0

Which of the following should a heart patient firmly avoid?

A
Cream

B
Mango

C
Rice

D
Milk

Solution

Heart diseases can be caused due to a number of factors such as age, gender, tobacco use, physical inactivity, excessive consumption of alcohol, unhealthy diet, obesity, family history of cardiovascular disease, hypertension, diabetics, high cholesterol levels , psychosocial factors and pollution, However, a patient with any form of heart disease should avoid cream as intake of dietary trans fat tends to perturb the body's ability to metabolize the essential fatty acids which lead to changes in the phospholipid fatty acid composition of the main artery of the heart. This tends to increase the risk of coronary heart disease.
So, the correct answer is option A.
Question 9
1 / -0

A schematic representation of the blood circulation is given. Which of the circulatory parts are incorrectly placed in it?

A
Right atrium and right ventricle

B
Left atrium and left ventricle

C
Pulmonary artery and pulmonary veins

D
Aorta and vena cava

Solution

The correct pathway is: Vena cava $$\rightarrow$$ Right atrium $$\rightarrow$$ Right ventricle $$\rightarrow$$ Pulmonary artery $$\rightarrow$$ Lungs $$\rightarrow$$ Pulmonary veins $$\rightarrow$$ Left atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Aorta $$\rightarrow$$ Rest of the body.
Aorta is the main artery that carries oxygenated blood from the left ventricle of the heart towards the other parts of the body.
Vena cava collects deoxygenated blood from the body and pours the blood into the right atrium.
So, the correct answer is option D.
Question 10
1 / -0

One of the factors required for the maturation of erythrocytes is

A
Vitamin D

B
Vitamin A

C
Vitamin B$$_{12}$$

D
Vitamin C

Solution

Vitamin B$$_{12}$$ and folic acid (vitamin B$$_9$$) (both are members of the B vitamin complex) are important for the final maturation of RBC. This is because they are both important for the synthesis of DNA and diminished quantity of DNA leads to failure of nuclear maturation and division. The RBCs also become larger than normal (megaloblasts) which are fragile and have a short lifespan (they can carry oxygen normally).
Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Body Fluids and Circulation Test - 73

Result

Body Fluids and Circulation Test - 73

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SHARING IS CARING

Question 1

A eukaryotic cell

A prokaryotic cell

Both eukaryotic and prokaryotic cell

Neither eukaryotic nor prokaryotic cell

Solution

Question 2

Fe (iron)

Mn (manganese)

Mg (magnesium)

K (potassium)

Solution

Question 3

An essential component of the clot

An essential component of the platelets

Essential for synthesis of prothrombin

Essential for synthesis of fibrinogen

Solution

Question 4

To convert carbohydrate into glycogen.

To separate ammonia.

To kill bacteria.

To convert protein into carbohydrate.

Solution

Question 5

b closes 3

b opens 4

a closes 2

a opens 1

Solution

Question 6

3 days

8 days

1 month

20 days

Solution

Question 7

Hepatic veins

Pulmonary vein

Hypophyseal portal vein

Renal vein

Solution

Question 8

Cream

Mango

Rice

Milk

Solution

Question 9

Right atrium and right ventricle

Left atrium and left ventricle

Pulmonary artery and pulmonary veins

Aorta and vena cava

Solution

Question 10

Vitamin D

Vitamin A

Vitamin B$$_{12}$$

Vitamin C

Solution

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