BREATHING AND RESPIRATION biology MCQ’s questions answers

 

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BREATHING AND RESPIRATION

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Question 1
Residual air mostly occurs in .....[MPPMT 1992]
A
Alveoli
B
Bronchus
C
Nostrils
D
Trachea
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Question 2
Which two of the following changes ( a-d) usually tend to occur in plain dwellers when they move to higher altitudes ( 3500 m or more) (a) Increase in red blood cell size. (b) Increase in red blood cell production. (c) Increase in breathing rate .(d) Increase in thrombocyte count
A
c and d
B
a and d
C
c and a
D
b and c
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Question 3
Carbonic anhydrase is mostly active in .....{MHCET 2011]
A
RBC
B
WBC
C
Blood plasma
D
Blood platelets
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Question 4
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? ..... [NEET-2017]
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transport
A
Only (d)
B
Only (a)
C
, (c) and (d)
D
(b) and (c)
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Question 5
Which is correct? [MPPMT 1993]
A
Respiratory centres are not affected by CO2
B
In humans vital capacity is just double the expiratory volume
C
A human lung has 103 alveoli
D
During inspiration the lungs acts as suction pump
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There are 5 questions to complete.

 

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