PNB 2265 LAB 4 QUIZZES WITH ANSWERS
UPDATED | LATEST UPDATE .
respiratory pigments - Correct Answer -proteins that transport oxygen, greatly increase the
amount of oxygen that blood can carry
what is the respiratory pigment in vertebrates? - Correct Answer -hemoglobin
oxyhemoglobin dissociation curve - Correct Answer -Relationship between available oxygen
and amount of oxygen carried by hemoglobin.
sigmoidal shape
binding of oxygen to hemoglobin dependent upon partial pressure of oxygen
cooperative binding of hemoglobin - Correct Answer -- hemoglobin consists of four
prosthetic heme groups that can bind one O2 each, as each individual O2 molecule binds, it
increases the affinity of the next heme group for the additional O2 molecule
- also works in reverse for O2 offloading
- results in a sigmoidal dissociation curve
upper pleateau of sigmoid curve - Correct Answer -Hb remains almost fully saturated in light
of any respiratory/circulatory abnormalities as is typically experienced in old age, illness, or a
low oxygen environment (e.g. high altitude).
p50 - Correct Answer -half-saturation pressure
at this point, half of hemoglobin present as oxyhemoglobin
Right Shift Curve - Correct Answer -P50 increases
lower affinity for oxygen
promotes release of oxygen
Left Shift Curve - Correct Answer -p50 decreases
1
UPDATED | LATEST UPDATE .
respiratory pigments - Correct Answer -proteins that transport oxygen, greatly increase the
amount of oxygen that blood can carry
what is the respiratory pigment in vertebrates? - Correct Answer -hemoglobin
oxyhemoglobin dissociation curve - Correct Answer -Relationship between available oxygen
and amount of oxygen carried by hemoglobin.
sigmoidal shape
binding of oxygen to hemoglobin dependent upon partial pressure of oxygen
cooperative binding of hemoglobin - Correct Answer -- hemoglobin consists of four
prosthetic heme groups that can bind one O2 each, as each individual O2 molecule binds, it
increases the affinity of the next heme group for the additional O2 molecule
- also works in reverse for O2 offloading
- results in a sigmoidal dissociation curve
upper pleateau of sigmoid curve - Correct Answer -Hb remains almost fully saturated in light
of any respiratory/circulatory abnormalities as is typically experienced in old age, illness, or a
low oxygen environment (e.g. high altitude).
p50 - Correct Answer -half-saturation pressure
at this point, half of hemoglobin present as oxyhemoglobin
Right Shift Curve - Correct Answer -P50 increases
lower affinity for oxygen
promotes release of oxygen
Left Shift Curve - Correct Answer -p50 decreases
1
