Oxygen Content Exam Questions with Verified Answers Latest 2025-2026
What is the amount of Pao2 dissolved in every 100mL of plasma in a healthy individual? - Answers
0.003mL/100mL or 0.03 vol%
How many heme groups does hemoglobin have? - Answers 4
When 4 oxygen molecules are bound to 1 hemoglobin molecule, the hemoglobin is said to be what? -
Answers 100% saturated w/ oxygen
What is hemoglobin bound with oxygen? - Answers oxyhemoglobin
What is hemoglobin not bound with oxygen? - Answers Deoxyhemoglobin/reduced hemoglobin
When the iron molecule in the heme goes from the ferrous state to the ferric state & hemoglobin can't
hold oxygen, what's it called? - Answers Methemoglobin
What's the normal hemoglobin value in an adult male? - Answers 14-16 g%
What's the normal hemoglobin value in an adult female? - Answers 12-15 g%
What's the average hemoglobin value in an infant? - Answers 14-20 g%
How much hemoglobin constitutes RBC weight? - Answers 33%
How much oxygen is Hb capable of carrying? - Answers 1.34mL squared
What is the formula for oxygen bound to hemoglobin? - Answers O2 bound to Hb = 1.34mL O2 x 15 g%
Hb
At a normal arterial oxygen pressure (Pao2) of 100 torr, the hemoglobin saturation (Sao2) is what
percentage because of normal physiological shunts? - Answers 97%
What are some normal physiological shunts? - Answers Thesbian venous drainage into the L atrium,
Bronchiole venous drainage into the pulmonary veins, Alveoli that are underventilated relative
pulmonary blood flow
How is polycythemia identified? - Answers When the hematocrit is greater than 52% in men (normal:
45%) & 48% in women (normal: 42%)
What does the oxyhemoglobin disassociation curve illustrate? - Answers The percentage of hemoglobin
that's chemically bound to oxygen @ each oxygen pressure
If the Po2 is 50mmHg, what's the percentage of hemoglobin that's bound to oxygen? - Answers 85%
What's the oxygen content level in vol%? - Answers 17 vol%
, What does the P50 represent? - Answers The partial pressure @ which the hemoglobin is 50% saturated
with oxygen
What mmHg is P50 normally? - Answers 27 mmHg
When the oxyhemoglobin disassociation curve shifts to the right, the P50 does what? - Answers
increases
When the oxyhemoglobin disassociation curve shifts to the left the P50 does what? - Answers decreases
What are some factors that shift the oxyhemoglobin disassociation curve to the right? - Answers
Increased pH, decreased pco2, decreased temp, decreased BPG, fetal hB, COhB (carboxyhemoglobin)
What are some factors that shift the oxyhemoglobin disassociation curve to the left? - Answers
Decreased pH, increased pco2, increased temp, increased BPG
Total oxygen delivery to the peripheral tissues is dependent on what? - Answers 1) The body's ability to
oxygenate blood
2) The hemoglobin concentration
3) The cardiac output
What is the formula for total oxygen delivery? - Answers Do2 = QT x (Cao2 x 10)
When does oxygen delivery decrease? - Answers When there is a decline in:
1) blood oxygenation
2) hemoglobin concentration
3) cardiac output
What is the formula for arterial-venous oxygen content difference? - Answers C(a-v)o2 = Cao2 = Cvo2
= 20 vol% - 15 vol% = 5 vol%
What are some factors that increase the arterial-venous oxygen content difference? - Answers 1)
Decreased cardiac output
2) Periods of increase oxygen consumption
3) Exercise
4) Seizures
5) Shivering
What is the amount of Pao2 dissolved in every 100mL of plasma in a healthy individual? - Answers
0.003mL/100mL or 0.03 vol%
How many heme groups does hemoglobin have? - Answers 4
When 4 oxygen molecules are bound to 1 hemoglobin molecule, the hemoglobin is said to be what? -
Answers 100% saturated w/ oxygen
What is hemoglobin bound with oxygen? - Answers oxyhemoglobin
What is hemoglobin not bound with oxygen? - Answers Deoxyhemoglobin/reduced hemoglobin
When the iron molecule in the heme goes from the ferrous state to the ferric state & hemoglobin can't
hold oxygen, what's it called? - Answers Methemoglobin
What's the normal hemoglobin value in an adult male? - Answers 14-16 g%
What's the normal hemoglobin value in an adult female? - Answers 12-15 g%
What's the average hemoglobin value in an infant? - Answers 14-20 g%
How much hemoglobin constitutes RBC weight? - Answers 33%
How much oxygen is Hb capable of carrying? - Answers 1.34mL squared
What is the formula for oxygen bound to hemoglobin? - Answers O2 bound to Hb = 1.34mL O2 x 15 g%
Hb
At a normal arterial oxygen pressure (Pao2) of 100 torr, the hemoglobin saturation (Sao2) is what
percentage because of normal physiological shunts? - Answers 97%
What are some normal physiological shunts? - Answers Thesbian venous drainage into the L atrium,
Bronchiole venous drainage into the pulmonary veins, Alveoli that are underventilated relative
pulmonary blood flow
How is polycythemia identified? - Answers When the hematocrit is greater than 52% in men (normal:
45%) & 48% in women (normal: 42%)
What does the oxyhemoglobin disassociation curve illustrate? - Answers The percentage of hemoglobin
that's chemically bound to oxygen @ each oxygen pressure
If the Po2 is 50mmHg, what's the percentage of hemoglobin that's bound to oxygen? - Answers 85%
What's the oxygen content level in vol%? - Answers 17 vol%
, What does the P50 represent? - Answers The partial pressure @ which the hemoglobin is 50% saturated
with oxygen
What mmHg is P50 normally? - Answers 27 mmHg
When the oxyhemoglobin disassociation curve shifts to the right, the P50 does what? - Answers
increases
When the oxyhemoglobin disassociation curve shifts to the left the P50 does what? - Answers decreases
What are some factors that shift the oxyhemoglobin disassociation curve to the right? - Answers
Increased pH, decreased pco2, decreased temp, decreased BPG, fetal hB, COhB (carboxyhemoglobin)
What are some factors that shift the oxyhemoglobin disassociation curve to the left? - Answers
Decreased pH, increased pco2, increased temp, increased BPG
Total oxygen delivery to the peripheral tissues is dependent on what? - Answers 1) The body's ability to
oxygenate blood
2) The hemoglobin concentration
3) The cardiac output
What is the formula for total oxygen delivery? - Answers Do2 = QT x (Cao2 x 10)
When does oxygen delivery decrease? - Answers When there is a decline in:
1) blood oxygenation
2) hemoglobin concentration
3) cardiac output
What is the formula for arterial-venous oxygen content difference? - Answers C(a-v)o2 = Cao2 = Cvo2
= 20 vol% - 15 vol% = 5 vol%
What are some factors that increase the arterial-venous oxygen content difference? - Answers 1)
Decreased cardiac output
2) Periods of increase oxygen consumption
3) Exercise
4) Seizures
5) Shivering
