The actual sites of gas exchange within the lungs are the A) ...

[geoffrey]

The actual sites of gas exchange within the lungs are the
 A) bronchioles.
  B) terminal bronchioles.
  C) spaces between the parietal and visceral pleura.
  D) blood air barrier of the alveoli.
  E) interlobular septa.

Question 2

Blocking ________ receptors in the ________ prevents long-term memory formation.
 A) serotonin; hypothalamus
  B) NMDA; hippocampus
  C) NMDA; midbrain
  D) serotonin; midbrain
  E) norepinephrine; hippocampus

[bdobbins]

Answer to Question 1

D

Answer to Question 2

B

[geoffrey]

Thanks for the timely response, appreciate it

[mohan]

Gracias!