Inhaling through the nostrils is preferred over the mouth because ...

[nmorano1]

Inhaling through the nostrils is preferred over the mouth because
 A) there is less resistance to air flow.
  B) it combines olfaction with respiration.
  C) it allows better conditioning of the inhaled air.
  D) bacteria won't be inhaled from the oral cavity.
  E) it dries out the mouth.

Question 2

Stimulation of the beta receptors on heart muscle cells results in
 A) the decrease in ATP production.
  B) increased heart rate and force of contraction.
  C) decreased force of contraction.
  D) slower heart rate.
  E) inhibition of the heart muscle.

[apple]

Answer to Question 1

C

Answer to Question 2

B