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UTA A&P II CH. 23 RESPIRATORY
SYSTEM 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Blood in the peripheral capillaries has low oxygen pressure and
high co2 pressure which causes __ to leave tissues and enter
the blood and __ to diffuse out of the blood and enter the tissue
- correct answer-CO2, O2
Red Blood Cells (rbcs)
Transport O2 ___ peripheral tissues and CO2 ____ peripheral
tissues - correct answer-to; from
Hb + O2 <-----> Hb-O2 - correct answer-oxyhemoglobin
O2 binds to iron ions in ___ - correct answer-hemoglobin
Each hemoglobin can bind ___ o2 molecules - correct answer-
4
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Each RBC has ___ ____ hemoglobin molecules (number) -
correct answer-280 million
The ___ the oxygen pressure the more oxygen combines with
hemoglobin - correct answer-higher
Percentage of heme units in a hemoglobin molecule that
contain bound oxygen - correct answer-Hemoglobin Saturation
PO2 high, hemoglobin ___ % saturated - correct answer-100
PO2 lower, hemoglobin ____ saturated - correct answer-
partially
Where the PO2 is higher, Hb holds lots of O2, pick it up &
transport it, which capillaries? - correct answer-Pulmonary
capillaries-
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PO2 lower, Hb does not hold as much O2, the oxygen
dissolves off Hb into tissues; this happens in which capillaries?
- correct answer-Tissue capillaries-
Graph relating the saturation of hemoglobin to partial pressure
of oxygen - correct answer-Oxygen-Hemoglobin Saturation
Curve
Each O2 bound to hemoglobin makes next O2 binding easier-\
- correct answer-cooperativity
Blood ph
Temperature
PCO2 of blood
Metabolic activity within rbcs- 2,3-bisphophoglycerate (BPG) -
correct answer-Environmental factors affecting Hb shape
Normal blood ph - correct answer-7.4
UTA A&P II CH. 23 RESPIRATORY
SYSTEM 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Blood in the peripheral capillaries has low oxygen pressure and
high co2 pressure which causes __ to leave tissues and enter
the blood and __ to diffuse out of the blood and enter the tissue
- correct answer-CO2, O2
Red Blood Cells (rbcs)
Transport O2 ___ peripheral tissues and CO2 ____ peripheral
tissues - correct answer-to; from
Hb + O2 <-----> Hb-O2 - correct answer-oxyhemoglobin
O2 binds to iron ions in ___ - correct answer-hemoglobin
Each hemoglobin can bind ___ o2 molecules - correct answer-
4
, Page | 2
Each RBC has ___ ____ hemoglobin molecules (number) -
correct answer-280 million
The ___ the oxygen pressure the more oxygen combines with
hemoglobin - correct answer-higher
Percentage of heme units in a hemoglobin molecule that
contain bound oxygen - correct answer-Hemoglobin Saturation
PO2 high, hemoglobin ___ % saturated - correct answer-100
PO2 lower, hemoglobin ____ saturated - correct answer-
partially
Where the PO2 is higher, Hb holds lots of O2, pick it up &
transport it, which capillaries? - correct answer-Pulmonary
capillaries-
, Page | 3
PO2 lower, Hb does not hold as much O2, the oxygen
dissolves off Hb into tissues; this happens in which capillaries?
- correct answer-Tissue capillaries-
Graph relating the saturation of hemoglobin to partial pressure
of oxygen - correct answer-Oxygen-Hemoglobin Saturation
Curve
Each O2 bound to hemoglobin makes next O2 binding easier-\
- correct answer-cooperativity
Blood ph
Temperature
PCO2 of blood
Metabolic activity within rbcs- 2,3-bisphophoglycerate (BPG) -
correct answer-Environmental factors affecting Hb shape
Normal blood ph - correct answer-7.4
