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

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BREATHING AND RESPIRATION (II)

Question 6 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Primary inspiratory muscles are:
A
Phrenic muscles.
B
Internal intercostal muscles.
C
Abdominal muscles.
D
External intercostal muscles.
Question 7 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Breathing rate will increase when CO2 ..... in our blood and causes a ..... in pH.
A
Increase/ rise
B
Increase/drop
C
Decrease/rise
D
Decrease/drop
Question 8 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The experiment considering physical exercise shows the loss of ..... while breathing.
A
No loss.
B
Health.
C
Energy
D
Water.
Question 9 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following statements is/are true or false?
(i) In humans lungs are situated in thoracic cavity.
(ii) The pleural fluid increases friction on the lung surface.
(iii) Nasopharynx opens through the glottis of the larynx region into the trachea.
(iv) The thoracic chamber is formed dorsally by the sternum and ventrally by the vertebral column.
(v) Breathing is affected by the contraction of lungs only.
A
(i), (ii) and (iii) are true while (iv) and (v) are false.
B
(i) and (iv) are true while (ii), (iii) and (v) are false.
C
(i) and (iii) are true while (ii), (iv) and (v) are false.
D
(i), (iv) and (v) are false while (ii) and (iii) are true.
Question 10 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Mark the wrong statement
A
Pneumotaxic centre increases the depth of breathing
B
Expiratory centre lies in pons and inspiratory centre lies in medulla
C
The inspiratory centre increases the strength of contraction of rib muscles
D
Breathing movements are caused by change in concentration of CO2 in the blood
There are 10 questions to complete.