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18 Cards in this Set
- Front
- Back
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pH - what does it mean?
a. equal numbers of [H+] ions and [OH-] ions. b. the negative logarithm of the hydrogen ion concentration c. the sum of the major anions and the major cation |
b. the negative logarithm of the hydrogen ion concentration
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Anion Gap:
a. equal numbers of [H+] ions and [OH-] ions. b. the negative logarithm of the hydrogen ion concentration c.The difference between the sum of the major anions and the major cation d. Na+ + K+ - Cl- - HCO3- e. c & d only |
e. c & d only
(The difference between the sum of the major anions and the major cations & Na+ + K+ - Cl- - HCO3-) |
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The body maintains the blood at pH:
a. 7.4 b. 7.5 c. 7.3 |
a. 7.4
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Henderson-Hasselbalch Equation:
a. pka = log ( [HCO3-] / [CO2] ) b. pH = log +pk ( [HCO3-] / [CO2] ) c. pH = pK + log ( [HCO3-] / [CO2] ) |
c. pH = pK + log ( [HCO3-] / [CO2] )
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Which of the 5 parameters of the ABG is measured? Which are calculated?
a. PaO2 b. PaCO2 c. HCO3 d. pH e. Base Excess |
measured:
a. PaO2 b. PaCO2 d. pH calculated: c. HCO3 e. Base Excess |
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The three electrodes that are responsible for ABG analysis: match the name with the item it measures:
a. Sanz Glass elctrode b. Clark Electrode c. Severinghaus Electrode ___O2 ___CO2 ___pH |
a. Sanz Glass elctrode
b. Clark Electrode c. Severinghaus Electrode _b__O2 _c__CO2 _a__pH (emily's hint: "my boyfriend went to the Clark building and I said OOOO!" and Harry Potter's Severing is a dark (blood) character.) |
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Definition of an acid:
a. negatively charged ions in solution b. molecule that accepts H+ ions c. molecule that gives up H+ ions |
c. molecule that gives up H+ ions (with dissociation)
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True or false:
Acids may have positive, negative, or neutral charges. |
True
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Which are the Intracellular and which are the extracellular buffers:
___ PO4 ___Plasma proteins ___Proteins ___Bicarb Buffer System ___Hgb |
_E__ PO4
_E__Plasma proteins _I__Proteins _E__Bicarb Buffer System (#1- 50%) _E__Hgb (#2 35%) |
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the main route for removal of modest H+ loads is:
a. kidneys b. liver c. lungs |
c. lungs (via the H2CO3 Bicarb buffer system)
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True or false:
Acute acidosis is efficiently handles by the kidneys. |
False: Chronic disturbances are handled by the kidneys. The lungs are responsible for Acute events with a 1-5min response time-- but is usually not complete.
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Renal buffer system is all but which one:
a. Bicarbonate buffer b. Phosphate buffer c. Ammonia buffer d. all of the above are renal buffers |
d. all of the above are renal buffers
* Phosphate buffer: H2PO4(-) HPO4(2-) + H+ * Bicarbonate buffer: H2CO3 HCO3(-) + H+ * Ammonia buffer: NH4(+) NH3 + H+ |
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CO2 transport in the body:
a. bound to HGB b. Dissolved in blood c. Bound to plasma proteins d. as bicarbonate ions e. all of the above f. a,b and d only |
e. all of the above
- 10% bound to HGB and plasma proteins - 5% Dissolved in blood - 85% as bicarbonate ions |
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What is the range of pH that is compatible with life?
a. 6.8- 7.8 b. 6.0 - 8.0 c. 7.2 - 7.8 |
a. 6.8- 7.8
--plasma proteins stop working outside of this range |
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what is the number 7.4 (-log)?
a. 74,000,000,000 b. 7.4 c. 0.00000004 d. 0.00000074 |
c. 0.00000004
(7.4 -log = decimal followed by 7 zeros and a 4) ex: log 1000 = 3 log 1.0 = 0 -log 0.0001 = -3 |
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what is the significance of 7.4 -log?(more than one answer)
a. it is a cool number b. it is the normal ECF H+ concentration c. it is an acidotic H+ concentration d. it is pH neutral e. 0.00000004 moles/liter of H+ concentration |
b. it is the normal ECF H+ concentration
d. it is pH neutral e. 0.00000004 moles/liter of H+ concentration |
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How many H+ ions are in blood ph of 7.3?
a. 24 b. 30 c. 40 d. 50 |
d. 50
-- a decrease in pH of 0.10 untis increases the H+ concentration 20% or 1.25 x the starting concentration (7.4 = 40nmol/l) |
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How many H+ ions are in a blood pH of 7.6?
a. 24 b. 30 c. 40 d. 50 |
a. 24
--an increase in pH of 0.10 units reduces the H= concentration by 20% or 0.8 x the starting concentration. |
