Physioex 9.0 Exercise 10

Topics: Carbon dioxide, PH, Bicarbonate Pages: 5 (856 words) Published: February 19, 2012
EXERCISE 10: Acid-Base Balance

Grading: True/False, Multiple-Choice, and Fill-in-the-blank type questions will be worth 1 point each whereas Short-answer type questions will be worth 2 points each. This lab will be worth a total of 45 points but will be converted to a percentage grade when registered in your “Gradebook”.

|ACTIVITY 1: Hyperventilation |Answers | |A substance that dissolves in water to release hydrogen (H+) ions is a(n) _______. |acid | |Which of the following is not a regulatory mechanism for acid/base balance in the body? |D. the digestive system | |the kidneys | | |the respiratory system | | |protein buffers | | |the digestive system | | |The maximum pH measured during hyperventilation was _______. |7.67 | |The tidal volume (TV) when breathing at rest was about _____ ml. The TV with hyperventilation was |500, 720 | |about _____ ml. | | |Describe the normal ranges for pH and PCO2 in the blood. |7.35 – 7.45 | |Describe what happened to the pH and the carbon dioxide in the blood with hyperventilation. |The pH increased and the carbon dioxide decreased. | |Explain how returning to normal breathing after hyperventilation differed from hyperventilation |When there is a return to normal breathing, there is a brief | |without returning to normal breathing. |period of about 10 seconds where the breath is held in order | | |retain CO2 before returning to normal breathing after | | |hyperventilation. The brief breath holding is what returns | | |hyperventilation to normal breathing. In hyperventilation | | |without return to normal breathing this does not happen. | |Describe some possible causes of respiratory alkalosis. |Anxiety. Traveling at high altitudes. Hyperventilation from | | |fevers. Panic attacks. | |ACTIVITY 2: Rebreathing | |In cases of acidosis, the pH of the blood is |C. Less than 7.35...
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