141.  The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does “A” represent?  
A.  Hering-Breuer reflex
B.  receptors for touch, temperature, pain stimule
C.  medullary chemoreceptors
D.  carotid and aortic body chemoreceptors
E.  proprioceptors

142. The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does “B” represent? 
A. Hering-Breuer reflex
B. receptors for touch, temperature, pain stimuli
C. medullary chemoreceptors
D. carotid and aortic body chemoreceptors
E. proprioceptors

143. The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does “C” represent? 
A. Hering-Breuer reflex
B. receptors for touch, temperature, pain stimuli
C. medullary chemoreceptors
D. carotid and aortic body chemoreceptors
E. proprioceptors

144. The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does “D” represent? 
A. Hering-Breuer reflex
B. receptors for touch, temperature, pain stimuli
C. medullary chemoreceptors
D. carotid and aortic body chemoreceptors
E. proprioceptors

145. The diagram illustrates the major regulatory mechanisms of ventilation. What mechanism does “E” represent? 
A. Hering-Breuer reflex
B. receptors for touch, temperature, pain stimuli
C. medullary chemoreceptors
D. carotid and aortic body chemoreceptors
E. proprioceptors

Fill in the Blank Questions
 

Use the following key to determine the best answer.
A. Choose this if the first item is greater than the second item.
B. Choose this if the first item is less than the second item.
C. Choose this if the first item is equal or nearly equal to the second item.146. (1) alveolar pressure during inspiration;
(2) alveolar pressure during expiration 
 

147. (1) PO₂ in alveolar air;
(2) PO₂ in venous blood 
 

148. (1) PO₂ of arterial blood;
(2) PO₂ of intracellular fluid. 
 

Match the term with the appropriate description, answer with the letter preceding the description.
A. the floor of the nasal cavity
B. superior portion of pharynx
C. a soft process that extends inferiorly from the posterior edge of the soft palate
D. the opening of the nasal cavity into the pharynx
E. external openings of the nasal cavity

149.  external nares
“Enter the letter of the correct description below”  
 

150.  internal nares
“Enter the letter of the correct description below”