To which anatomic structures do the ventral respiratory centers ...

[LCritchfi]

To which anatomic structures do the ventral respiratory centers send motor signals during inspira-tion? 1. Diaphragm 2. Larynx 3. Pharynx 4. Sternocleidomastoid s
 
  a. 1, 2, and 3 only
  b. 2 and 4 only
  c. 1 only
  d. 1, 2, and 4

Question 2

Which of the following control the inhibitory neurons that switch off the inspiratory ramp signal? 1. Apneustic center 2. Pneumotaxic center 3. Pulmonary stretch receptors
 
  a. 1, 2, and 3
  b. 1 and 2 only
  c. 3 only
  d. 2 and 3 only

[nickk12214]

Answer to Question 1

ANS: A
Some inspiratory VRG neurons send motor impulses through the vagus nerve to the laryngeal and pharyngeal muscles, abducting the vocal cords and increasing the diameter of the glottis. Other VRG inspiratory neurons transmit impulses to the diaphragm and external intercostal mus-cles.

Answer to Question 2

ANS: D
The inhibitory neurons that switch off the inspiratory ramp signal are controlled by the pneumo-taxic center and pulmonary stretch receptors.

[LCritchfi]

Correct answers!

[nickk12214]

Great! Please up vote