Biology
Respiration
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#17 The oxygen content of expired air is about
A) 4%
B) 10%
C) 16%
D) 20%
Answer: C
#18 The major part of CO2 is transported to the respiratory surface as
A) HCO3 ions
B) H2CO3
C) HB-CO2
D) Free CO2
Answer: A
#19 Myoglobin is found in the
A) Lungs
B) Blood
C) Musceles
D)RBC
Answer: C
#20 In the anaerobic respiration of musceles, pyruvic acid is changed into
A) Alcohol
B) Acet aldehyde
C) Acetyl CO-A
D) Lactic acid
Answer: D
#21 The respiration rate is lowest during
A) Running
B) Playing
C) Eating
D) Sleeping
Answer: D
#22 The oxygen carrying capacity of blood is about
A) 20%
B) 30%
C) 40%
D) 50%
Answer: A
#23 The volume of air remaining in the lungs after maximum respiratory effort is known as
A) Vital capacity
B) Residual volume
C) Total lung capacity
D) Tidal volume
Answer: B
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