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plumcrazee plumcrazee
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12 years ago Edited: 12 years ago, plumcrazee
1.  a.  Where is the inspiratory center located in the medulla?  Ventral respiratory group
     b.  Where is the  expiratory center located in the medulla?  Ventral respiratory group

2.  What modifies these medullary centers?  
   a.  central and peripheral chemoreceptors
   b.  pons

3.  What is the most important stimulus controlling ventilation?  CO2

4.  What ion directly stimulates the central chemoreceptors?  H+

5.  Arterial PO2 must drop below what to stimulate the peripheral chemoreceptors?  60mmHg

6.  If a person hyperventilates, what will happen to the following in the blood?
   a.  PO2 - decreases
   b.  pH  -  increases

7.  If a person hypoventilates, what will happen to the following in the blood?
   a.  PO2     decreases
   b.  PCO2  increases

8.  What does lung hyperinflation stimulate?
   a.  pulmonary stretch receptors (PSR’s)
   b.  The effect on inspiration is:  inhibition
   c.  What is this reflex called?  Inflation or Hering-Breuer reflex

9.  Dust, smoke, and noxious fumes will stimulate receptors in the airways.
   a.  Name the receptors:  Irritant receptors
   b.  Explain the protective reflexes:  They remove irritants from airways; stimulate cough/sneeze

10.  Name four of the six factors which probably increase ventilation during exercise:
   a.  Increased body temperature
   b.  receptors in the muscles and joints
   c.  epinephrine; norepinephrine
   d.  pH changes (lactic acid)

Source  Human A&P, Marieb 8th ed.
Read 19814 times
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plumcrazee Author
wrote...
12 years ago
1.  a.  Where is the inspiratory center located in the medulla?  Ventral respiratory group
     b.  Where is the  expiratory center located in the medulla?  Ventral respiratory group

2.  What modifies these medullary centers? 
   a.  central and peripheral chemoreceptors
   b.  pons

3.  What is the most important stimulus controlling ventilation?  CO2

4.  What ion directly stimulates the central chemoreceptors?  H+

5.  Arterial PO2 must drop below what to stimulate the peripheral chemoreceptors?  60mmHg

6.  If a person hyperventilates, what will happen to the following in the blood?
   a.  PO2 - decreases
   b.  pH  -  Increases

7.  If a person hypoventilates, what will happen to the following in the blood?
   a.  PO2     Decreases
   b.  PCO2  Increases

8.  What does lung hyperinflation stimulate?
   a.  pulmonary stretch receptors (PSR’s)
   b.  The effect on inspiration is:  inhibition
   c.  What is this reflex called?  Inflation or Hering-Breuer reflex

9.  Dust, smoke, and noxious fumes will stimulate receptors in the airways.
   a.  Name the receptors:  Irritant receptors
   b.  Explain the protective reflexes:  They remove irritants from airways; stimulate cough/sneeze

10.  Name four of the six factors which probably increase ventilation during exercise:
   a.  Increased body temperature
   b.  receptors in the muscles and joints
   c.  epinephrine; norepinephrine
   d.  pH changes (lactic acid)


Had to write decreases/increases instead of arrows..Slight Smile
tomowu
wrote...
On Hiatus
12 years ago
Helped a lot (thank you!) would be so happy if you could upload more Person Raising Both Hands in Celebration
plumcrazee Author
wrote...
12 years ago
I will be...I am going to be posting some more tonight  Grinning Face
wrote...
11 years ago
 Thank you so much for all your posting. Make life so much easier. 
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