BREATHING AND RESPIRATION (II) biology MCQ’s questions answers

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BREATHING AND RESPIRATION (II)

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Alveoli surfactant is produced by
A
Kupffer's cells
B
Dust cells
C
Type I pneumocyte
D
Type II pneumocyte
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The "mountain sickness" in persons climbing to high attitudes without the aid of oxygen cylinders is due to
A
lack of sufficient amount of haemoglobin
B
lack of sufficient amount of erythrocytes
C
arterial hypoxia
D
anaemic hypoxia
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If the length of trachea is extended to the length of two vertebrae in the linear position, to which thoracic vertebrae, the trachea is divided:
A
5th vertebrae
B
7th vertebrae.
C
12th vertebrae.
D
8th vertebrae.
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sound production in humans is controlled by
A
Pharynx
B
Larynx
C
Nares
D
Lungs
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Assertion: CO2 is carried in the plasma mainly as HCO3- ions.
Reason: Enzyme carbonic anhydrase of RBC catalyses the formation of HCO3- ions that enter the plasma.
A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false.
There are 5 questions to complete.

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