Across
- 6. we breath more vigorously and deeply during ... .
- 9. we all have ... controlled our breathing pattern at one time or another.
- 11. the medula contains two ... centers.
- 13. the respiratory system in healthy individuals has ... mechanisms.
- 14. an increase in the carbon dioxide level can cause a decrease ... pH.
- 15. the ventral respiratory group (VRG) contains both ... and expiratory neurons.
- 18. ... are able to detect high carbon dioxide levels when oxygen levels are low.
- 24. the vagus nerves send ... from the stretch receptors to the medula.
- 25. a low blood pH could also result from ... activities independent of breathing.
- 26. ... acid increases dramatically during hypoventilation.
- 27. respiratory pattern is called ... .
- 28. ... centers that control respiratory rhythm and depth.
Down
- 1. changes in oxygen concentration in the blood are detected by ... chemoreceptor region in the aorta.
- 2. hyperventilation often brought on by ... attacks.
- 3. after ... exercise expiration becomes active.
- 4. the hyperventilating person may get ... and faint because the resulting alkalosis.
- 5. ... can dramatically change the amount of carbonic acid in the blood.
- 6. ... factors also modify the rate and depth of breathing.
- 7. ... air contains more carbon dioxide than atmospheric air.
- 8. impulses from the expiratory neurons stop the stimulation of the ... and external intercostal muscles.
- 9. every ... in the body must have oxygen to live.
- 10. during singing and ... breath control is extremely important.
- 12. hyperventilation is an increase in the ... and depth of breathing.
- 16. increased body ... also causes an increase in the rate of breathing.
- 17. the ... and alveoli have stretch receptors that respond to extreme overinflation.
- 19. if breathing stops for an extended time ,... may occur as a result of insufficient oxygen in the blood.
- 20. breathing control centers are ... centers and medula centers.
- 21. by contrast,when blood starts to become slightly ... or basic,breathing slows and becomes shallow.
- 22. ... factors is the most important factors that can modify respiratory rate and depth.
- 23. slower ... allows carbon dioxide to accumulate in the blood.