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GCU BIO 202 Respiratory exam with Questions & Correct Verified Answers| Already Passed
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GCU BIO 202 Respiratory exam withQuestions & Correct Verified Answers|
Already Passed
Normal composition of air? - ✔✔Nitrogen- 80%
Oxygen-19%
Argon- 1%
Dalton's Law - ✔✔at constant volume and temperature, the total pressure exerted by a mixture
of gases is equal to the sum of the partial pressures of the component gases
Henry's Law - ✔✔At a given temperature the solubility of a gas in a liquid is directly proportional
to the pressure of the gas above the liquid
Why do scuba divers get BENDS (Henry's Law) - ✔✔more gases are dissolved in liquid when the gas
is pressurized. The high concentration of oxygen is then taken in by the scuba diver
structure of hemoglobin - ✔✔is a four subunit protein containing iron.
If tissue has a high oxygen reserve, how is hemoglobin going to respond in terms of giving up its oxygen?
- ✔✔It will not give up it's oxygen because the tissue is already saturated. The tissue is saturated
because it is not doing that much work.
, When pH drop or temperature rises what happens ti oxygen on hemoglobin - ✔✔More oxygen
is released because the metabolically active tissue needs more oxygen.
Metabolically active tissue release pH lowering ions and release heat (energy).
When pH rises or temperature drops what happens to oxygen on hemoglobin. - ✔✔Less oxygen is
released. A less metabolically active tissue will not "want" Hb to let go of its Oxygen because it is already
full.
positive cooperativity of hemoglobin - ✔✔when first heme unit is oxygenated, O2 affinity of
second heme unit is increased and so on
oxyhemoglobin saturation curve - ✔✔as you increase the PO2 you will also increase the saturation
of oxygen in hemoglobin... up to a plateau (around 98%)
The Bohr effect - ✔✔a decrease in the amount of oxygen associated with hemoglobin and other
respiratory compounds in response to a lowered blood pH resulting from an increased concentration of
carbon dioxide in the blood.
Three ways in which carbon dioxide is transported in the blood - ✔✔1. Binds to hemoglobin
2. Dissolved in blood plasma
3. Converted to carbonic acid
carbonic anhydrase - ✔✔An enzyme present in erythrocytes (as well as in other places) that
catalyzes the conversion of CO2 and H2O into carbonic acid (H2CO3).
Where does carbon dioxide bind to hemoglobin when forming carbaminohemoglobin? - ✔✔Binds at
a-amino group
Haldance Effect - ✔✔at the lungs, oxygenated blood has a reduced capacity to carry CO2, and it
is unloaded as we exhale
What two regions of the brain are respiratory located in? - ✔✔Pons and medulla oblongota
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