Author Question: Which of the following correctly describes a facet of chloride? a. A loss of Cl is equivalent to ... (Read 41 times)

jwb375 · **on:** Jul 16, 2018

Which of the following correctly describes a facet of chloride?

a. A loss of Cl is equivalent to a gain in ac-id.
b. Cl is usually excreted with H+ as HCl.
c. Cl levels vary inversely with HCO3 lev-els.
d. Cl plays a key role in acid-base buffering.

Question 2

The alveolar interstitial region of the lungs remains relatively dry primarily because of what?

a. Low capillary hydrostatic pressure
b. Low capillary osmotic pressure
c. Low capillary permeability
d. Low interstitial osmotic pressure

s.meritte · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
The concentration of extracellular chloride is inversely proportional to that of the other major an-ion, bicarbonate (HCO3).

Answer to Question 2

ANS: A
To minimize interstitial fluid in the alveolar-capillary region, the hydrostatic pressure difference must be kept low. The pulmonary circulation is in fact a low-pressure system. The mean pulmo-nary vascular pressures are approximately one-sixth of those in the systemic circulation. Colloid osmotic pressure exceeds hydrostatic forces across the entire length of the pulmonary capillaries in healthy individuals.