Where are the inspiratory and expiratory centers in the brain ...

[Zoey63294]

Where are the inspiratory and expiratory centers in the brain found?
 
  a. Broca's area
  b. Neurons in the cerebellum
  c. Pons
  d. No such centers exist

Question 2

Sensory input to the dorsal respiratory neurons from the lungs, airways, and peripheral chemore-ceptors is provided via which nerves?
 
  1. Glossopharyngeal
  2. Phrenic
  3. Vagus
  4. Trigeminal
  a. 1 and 2 only
  b. 1, 2, and 4 only
  c. 1 and 3 only
  d. 2 and 3 only

[skipfourms123]

Answer to Question 1

ANS: D
Recent evidence shows that inspiratory and expiratory neurons are anatomically intermingled and do not necessarily inhibit one another. No clearly separate inspiratory and expiratory centers ex-ist.

Answer to Question 2

ANS: C
The vagus and glossopharyngeal nerves transmit many sensory impulses to the DRGs from the lungs, airways, peripheral chemoreceptors, and joint proprioceptors. These impulses modify the basic breathing pattern generated in the medulla.