Expiration
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- Diaphragm
- Internal intercostal muscles
- None of the above
- Abdominal muscles
- equal to
- none of the above
- lower than
- higher than
Breathing is a process that
(I) Provides oxygen to the body.
(II) Breaks down food to release energy.
(III) Helps the body to get rid of carbon dioxide.
(IV) Produces water in the cells.
Which of the following correctly defines the functions of breathing?
(i) and (ii)
(ii) and (iii)
(i) and (iii)
(ii) and (iv)
- positive
- none of the above
- both positive and negative
- negative
- negative
- positive
- both positive and negative
- none of the above
- inspiration
- forced expiration
- normal expiration
- normal respiration
Photosynthesis and respiration are interdependent.
- True
- False
Amount of CO2 in expired air is about
- 0.03%
- 21%
- 0.04%
- 4.5%
- relaxes, increases
- contracts, decreases
- relaxes, decreases
- contracts, increases
In expiration diaphragm becomes
flattened
relaxed
straightened
arched/dome shaped
I. Diaphragm contracts
II. External inter-costal muscles relax
III. External inter-costal muscles contract
IV. Internal inter-costal muscles expand
V. Diaphragm relaxes
- I, II and IV
- II and V
- III, IV and V
- III and IV
Rate of respiration is slow in plants
- True
- False
- increases, increases
- decreases, increases
- decreases, decreases
- increases, decreases
At the time of expiration, the diaphragm becomes
Oblique
Normal
Dome-Shaped
Flattened
- Maximum air that can be breathed in and breathed out
- Residual volume
- Expiratory reserve volume
- Total lung capacity
- higher than
- lower than
- equal to
- none of the above
- Root tip
- Leaf bud
- Germinating seed
- Growing shoot apex
- negative
- positive
- both positive and negative
- none of the above
- Residual volume
- Expiration phase
- Total lung capacity
- None of the above
- Diaphragm
- Internal intercostal muscles
- Abdominal muscles
- None of the above
- Oblique
- Dome-shaped
- Flattened
- Normal
I. Diaphragm contracts
II. External inter-costal muscles relax
III. External inter-costal muscles contract
IV. Internal inter-costal muscles expand
V. Diaphragm relaxes
- I, II and IV
- II and V
- III, IV and V
- III and IV
- Decreasing levels of pCO2 and H+ in blood stimulate the expiratory area in brain
- Decreasing levels of pCO2 in blood stimulates the inspiratory area in brain
- Rise in blood pCO2 and H+ concentration stimulates the inspiratory area in brain
- Elevation of pO2 and H+, and decrease in pCO2 level of blood, all stimulate the inspiratory area in brain.
Select the correct sequence of words to complete the above paragraph.
- Decrease, Decrease, Below
- Increase, Decrease, Above
- Decrease, Increase, Above
- Increase, Increase, Below
- Expiration
- Inspiration
- Interval between expiration and inspiration
- Interval between inspiration and expiration
- increases, increases
- decreases, increases
- increases, decreases
- decreases, decreases
- Lung alveoli and blood capillaries
- Lung alveoli and bronchi
- The buccal cavity and the external atmosphere
- Lung alveoli and pulmonary artery
State whether the following statements are true or false. If false, rewrite the correct form of the statement by changing word/words.
(d) Pressure of air in the lungs decreases during expiration.
- True
- False
(i) A water breather expends much more energy in ventilating its respiratory surface than an air-breathing one.
(ii) Lungs become empty after forceful expiration.
(iii) Exchange of gases in the lungs is interrupted during expiration.
(iv) Respiratory movements are controlled by CO2 concentration of arterial blood.
Which of the above two statements have mistakes?
- (i) and (iv)
- (ii) and (iii)
- (i)and(ii)
- (iii) and (iv)