a.expiration is normally a passive process.
b.atmospheric pressure is greater than alveolar pressure during expiration.
c.during inspiration air flows in from outside to reduce the partial pressure in the alveoli
d.the average lung volumes are estimated to be approximately 60Litres.
e.if atmospheric pressure is equal to alveolar pressure there will be maximum air flow.
2007-02-04 05:43:43 · 2 answers · asked by simi 1 in Science & Mathematics ➔ Zoology
A. True
B. False
C. True
D. False
E. False
2007-02-04 05:53:19 · answer #1 · answered by bob shark 7 · 0⤊ 0⤋
i would tick A. All breathing is genrally passive, controlled by the respiratory centre in the brain stem. To Breath in the lungs generate a negitive pressure. The average lung volume is about 6-7 mililetres per kilo. 60L is ridiculous!
2007-02-04 13:55:07 · answer #2 · answered by Brenda R 2 · 0⤊ 0⤋