Which of the following is true regarding normal quiet expiration of air?
A) It depends on the complete lack of surface tension on the alveolar wall.
B) It is a passive process that depends on the recoil of elastic fibers that were stretched during inspiration.
C) It requires contraction of abdominal wall muscles.
D) It is driven by increased blood CO2 levels.
B
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Seeing multiple doctors at the same time can lead to ________
A) Polypharmacy B) Carcinoma C) Loss of insurance D) Increased agitation
The end result of the classical and alternative pathways of complement activation is
A) an increase in pyrogen release. B) release of histamine. C) activated C3B attached to the cell wall. D) C1 bound to two antibodies. E) activation of properdin.
The partial pressure gradient for oxygen (in the body) is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues.
What will be an ideal response?
Muscles maintain a constant state of partial contraction known as ____________________
Fill in the blank(s) with correct word