Breathing and Exchange of Gases Test 66

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Breathing and Exchange of Gases Test 66

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Weekly Quiz Competition

Question 1
1 / -0

Inner surface of bronchi, bronchioles and fallopian tubes is lined by.

A
Columnar epithelium

B
Squamous epithelium

C
Cubical epithelium

D
Ciliated epithelium
Question 2
1 / -0

Each $$100$$ml of human arterial blood carries 'P' ml of $$O_2$$ and 'Q' ml of $$CO_2$$ whereas each $$100$$ml of venous blood carries 'R' ml of $$O_2$$ and 'S' ml of $$CO_2$$. Choose the correct values of P, Q, R and S.

A
P-$$48$$ml, Q-$$19$$ to $$20$$ml, R-$$52$$ml, S-$$14$$ to $$15$$ml

B
P-$$19$$ to $$20$$ml, Q-$$48$$ml, R-$$14$$ to $$15$$ml, S-$$52$$ml

C
P-$$14$$ to $$15$$ml, Q-$$52$$ml, R-$$19$$ml to $$20$$ml, S-$$48$$ml

D
P-$$52$$ml, Q-$$14$$ to $$15$$ml, R-$$48$$ml, S-$$19$$ to $$20$$ml
Question 3
1 / -0

Choose the right sequential phenomena during passage of $$O_2$$ from blood to tissues.
P. Absorption of $$CO_2$$ by blood
Q. Reaction of $$CO_2$$ with water forming $$H_2CO_3$$ inside RBCs and then $$H^+$$ and $$HCO_3$$ ions.
R. Reaction of $$CO_2$$ with water forming $$H_2CO_3$$ inside plasma followed by conversion into $$H^+$$ and $$HCO_3$$ ions.
S. Combination of $$H^+$$ with haeme part of $$HbO_2$$ to release $$O_2$$.
T. Combination of $$HCO_3$$ with haeme part of $$HbO_2$$ to form reduced haemoglobin and release of $$O_2$$.

A
P.R.S.

B
P.Q.T.

C
P.Q.S.

D
P.R.T.
Question 4
1 / -0

What is the total oxygen carrying capacity of blood?

A
$$20ml/dl$$

B
$$10ml/dl$$

C
$$25ml/dl$$

D
$$15ml/dl$$

Solution

A normal person has about 15 gm (12-16 gm) of Hb Per 100 ml of blood.

1 gm of Hb binds with 1.34 ml of O2. Thus, 100 gm blood carries about 20 ml oxygen. So, O2 carrying capacity of blood is about 20%
So, the correct answer is '20ml/dl'
Question 5
1 / -0

$$CO_2$$ is carried in blood by haemoglobin in the form of _______.

A
Sodium bicarbonate

B
Potassium bicarbonate

C
Carbamino compound

D
Methanoglobin
Question 6
1 / -0

Carbon dioxide is carried in blood.

A
As dissolved gas

B
As bicarbonate

C
In combination with haemoglobin

D
All the above
Question 7
1 / -0

Match the columns and find the correct combination.
I II
(a) Larynx (p) Lid of larynx
(b) Trachea (q) Air sacs
(c) Alveoli (r) Voice box
(d) Epiglottis (s) Wind pipe
(t) Common passage

A
a-r, b-s, c-q, d-p

B
a-r, b-t, c-q, d-p

C
a-r, b-s, c-p, d-q

D
a-r, b-s, c-q, d-t

Solution

The larynx is another name for the voice box. It's a tube about 2 inches long in adults. It sits above the windpipe in the neck and in front of the food pipe. The trachea, also called as the windpipe, is a tube that connects the pharynx and larynx to the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. Alveoli are the air sacs present inside the lungs, these are the site of exchange of gases. The epiglottis is a flap in the throat that keeps food from entering the windpipe and the lungs. The flap is made of elastic cartilage covered with a mucous membrane, attached to the entrance of the larynx.
Hence the correct answer is (A)
Question 8
1 / -0

Which structure of lungs is directly involved in $$O_2/ CO_2$$ exchange between air and blood capillaries?

A
Bronchi

B
Trachea

C
Alveoli

D
Secondary bronchi

Solution

During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are present in close contact with the alveoli.
So, the correct answer is 'Alveoli'
Question 9
1 / -0

What percentage of $$CO_2$$ is transported as bicarbonate $$(HCO_3)$$?

A
$$70\%$$

B
$$7\%$$

C
$$20-25\%$$

D
$$97\%$$

Solution

Nearly 20-25% of carbon dioxide is transported by RBCs whereas 70% of it is carried as bicarbonate. About 7% of carbon dioxide is carried in a dissolved state through plasma.
So, the correct answer is '70%'
Question 10
1 / -0

What would happen if human blood becomes acidic?

A
Oxygen carrying capacity of haemoglobin increases

B
Oxygen carrying capacity of haemoglobin decreases

C
RBC count increases

D
RBC count decreases
Solution
- An increase in blood CO$$_2$$ concentration leads to a decrease in blood pH, i.e. blood becomes acidic.
- At acidic pH haemoglobin will release the bind oxygen.
- This causes decreased affinity of haemoglobin molecules towards oxygen.
- RBC count is not directly affected by blood pH.
So, the correct answer is option B.

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	I		II
(a)	Larynx	(p)	Lid of larynx
(b)	Trachea	(q)	Air sacs
(c)	Alveoli	(r)	Voice box
(d)	Epiglottis	(s)	Wind pipe
		(t)	Common passage

Breathing and Exchange of Gases Test 66

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Breathing and Exchange of Gases Test 66

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Question 1

Columnar epithelium

Squamous epithelium

Cubical epithelium

Ciliated epithelium

Question 2

P-$$48$$ml, Q-$$19$$ to $$20$$ml, R-$$52$$ml, S-$$14$$ to $$15$$ml

P-$$19$$ to $$20$$ml, Q-$$48$$ml, R-$$14$$ to $$15$$ml, S-$$52$$ml

P-$$14$$ to $$15$$ml, Q-$$52$$ml, R-$$19$$ml to $$20$$ml, S-$$48$$ml

P-$$52$$ml, Q-$$14$$ to $$15$$ml, R-$$48$$ml, S-$$19$$ to $$20$$ml

Question 3

P.R.S.

P.Q.T.

P.Q.S.

P.R.T.

Question 4

$$20ml/dl$$

$$10ml/dl$$

$$25ml/dl$$

$$15ml/dl$$

Solution

Question 5

Sodium bicarbonate

Potassium bicarbonate

Carbamino compound

Methanoglobin

Question 6

As dissolved gas

As bicarbonate

In combination with haemoglobin

All the above

Question 7

a-r, b-s, c-q, d-p

a-r, b-t, c-q, d-p

a-r, b-s, c-p, d-q

a-r, b-s, c-q, d-t

Solution

Hence the correct answer is (A)

Question 8

Bronchi

Trachea

Alveoli

Secondary bronchi

Solution

Question 9

$$70\%$$

$$7\%$$

$$20-25\%$$

$$97\%$$

Solution

Question 10

Oxygen carrying capacity of haemoglobin increases

Oxygen carrying capacity of haemoglobin decreases

RBC count increases

RBC count decreases

Solution

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