Breathing and Exchange of Gases Test 45

Question 1
1 / -0

Select the correct sequence of events that occur during the delivery of $$O_2$$ from blood to tissue.

P: Absorption of $$CO_2$$ by the blood.
Q : Reaction of absorbed $$CO_2$$ with $$H_2$$ to form $$H_2 {CO}{_3}$$ within RBC and its conversion into $$H^+$$ and $${HCO}^{-}_{3}$$ ions.
R : Reaction of absorbed $${CO}_2$$ with $$H_2{O}$$ in plasma to form $$H_2 {CO}{_3}$$ and its conversion into $$H^+$$ and $${HCO}^{-}_{3}$$ ions.
S: Combination of $$H^+$$, $${CO}_2$$, and $${HbO}{_2}$$ to release $$O_2$$.
T: Combination of $${HCO}^{-}_{3}$$ with heme portion of $${HbO}{_2}$$ to form reduced haemoglobin and release of $$O_2$$.

A
P, Q, T

B
P, R, S

C
P, Q, S

D
P, R, T

Question 2
1 / -0

Select the correct option:
Mercury (Hg) is generally used in anaerobic respiration experiments because it does not react with ___________.

A
$${O}_{2}$$

B
$${CO}_{2}$$

C
$${H}_{2}O$$

D
$$air$$

Question 3
1 / -0

Mammalian lungs have an enormous number of minute alveoli (air sac);This is to allow

A
more surface area for diffusion of gases

B
more space for increasing the volume of inspired air

C
more nerve supply to keep the lungs working

D
more spongy texture for keeping lung in proper shape.

Question 4
1 / -0

Given below is a sigmoid curve for oxyhemoglobin dissociation :-
Which of the following factor favour for shifting of curve (B) $$\leftarrow$$ (A)

A
Low $$PO_2$$, less $$H^+$$ concentration, less temperature.

B
High $$PO_2$$, less $$H^+$$ concentration, less temperature.

C
Low $$PO_2$$, less $$H^+$$ concentration, more temperature.

D
None of these

Question 5
1 / -0

Which of the following cofactor is responsible for the activity of an enzyme leading to the formation of carbonic acid in RBCs?

A
$$Ca ^{++}$$

B
$$Zn ^{++}$$

C
$$Mn ^{++}$$

D
$$Mg ^{++}$$

Question 6
1 / -0

Read the given statements and select the correct option.
Statement 1: Respiration is most efficient in the insects, among the invertebrates.
Statement 2: In the insects, air is carried directly to the cells by tracheoles.

A
Both statements 1 and 2 are correct.

B
Statement 1 is correct but statement 2 is incorrect.

C
Statement 1 is incorrect but statement 1 is correct.

D
Both statements 1 and 2 are incorrect.

Question 7
1 / -0

Which of the following options is incorrect about the larynx (sound box)?

A
It is a bony box.

B
Glottis is the opening into the larynx.

C
During swallowing of food glottis is covered by epiglottis to prevent food entry into the larynx.

D
All of these.

Question 8
1 / -0

Listed below are four respiratory capacities (i-iv) and four jumbled respiratory volumes of a normal human adult.
Respiratory volumes and capacities Volume of air
(i) Residual volume 2500 mL
(ii) Vital capacity 3500 mL
(iii) Inspiratory reserve volume 1200 mL
(iv) Inspiratory capacity 4500 mL
Which one of the following is the correct matching of two capacities and volumes?

A
(ii) 2500 mL, (iii) 4500 mL

B
(iii) 1200 mL, (iv) 2500 mL

C
(iv)3500mL, (i) 1200 mL

D
(i) 4500 mL; (ii) 3500 mL

Question 9
1 / -0

Fill up the blanks in the following paragraph by selecting the correct option.
The movement of air into and out of the lungs is carried out by creating a ____(i)____ between the lungs and the atmosphere. Inspiration can occur if intra-pulmonary pressure is ___(ii)____than the atmospheric pressure. Expiration takes place when the intra-pulmonary pressure is ___(iii)___ than the atmospheric pressure. Inspiration is initiated by the ___(iv)___ of diaphragm which ____(v)____ the volume of thoracic chamber in the anteroposterior axis.

A
(i) concentration gradient (ii) less (iii) higher (iv) relaxation (v)increases

B
(i) concentration gradient (ii) higher (iii) less (iv) contraction (v)decreases

C
(i) pressure gradient (ii) higher (iii) less (iv) relaxation (v)decreases

D
(i) pressure gradient (ii) less (iii) higher (iv) contraction (v) increases

Question 10
1 / -0

The carbon dioxide is transported via blood to lungs mostly

A
In combination with haemoglobin only.

B
Dissolved in blood plasma.

C
In the form of bicarbonates.

D
As carbaminohaemoglobin.

Submit Test

Respiratory volumes and capacities	Volume of air
(i) Residual volume	2500 mL
(ii) Vital capacity	3500 mL
(iii) Inspiratory reserve volume	1200 mL
(iv) Inspiratory capacity	4500 mL

Breathing and E...

Question 1

P, Q, T

P, R, S

P, Q, S

P, R, T

Question 2

$${O}_{2}$$

$${CO}_{2}$$

$${H}_{2}O$$

$$air$$

Question 3

more surface area for diffusion of gases

more space for increasing the volume of inspired air

more nerve supply to keep the lungs working

more spongy texture for keeping lung in proper shape.

Question 4

Low $$PO_2$$, less $$H^+$$ concentration, less temperature.

High $$PO_2$$, less $$H^+$$ concentration, less temperature.

Low $$PO_2$$, less $$H^+$$ concentration, more temperature.

None of these

Question 5

$$Ca ^{++}$$

$$Zn ^{++}$$

$$Mn ^{++}$$

$$Mg ^{++}$$

Question 6

Both statements 1 and 2 are correct.

Statement 1 is correct but statement 2 is incorrect.

Statement 1 is incorrect but statement 1 is correct.

Both statements 1 and 2 are incorrect.

Question 7

It is a bony box.

Glottis is the opening into the larynx.

During swallowing of food glottis is covered by epiglottis to prevent food entry into the larynx.

All of these.

Question 8

(ii) 2500 mL, (iii) 4500 mL

(iii) 1200 mL, (iv) 2500 mL

(iv)3500mL, (i) 1200 mL

(i) 4500 mL; (ii) 3500 mL

Question 9

(i) concentration gradient (ii) less (iii) higher (iv) relaxation (v)increases

(i) concentration gradient (ii) higher (iii) less (iv) contraction (v)decreases

(i) pressure gradient (ii) higher (iii) less (iv) relaxation (v)decreases

(i) pressure gradient (ii) less (iii) higher (iv) contraction (v) increases

Question 10

In combination with haemoglobin only.

Dissolved in blood plasma.

In the form of bicarbonates.

As carbaminohaemoglobin.

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