Which of the following situations would result in the greatest degree of O2 saturation forhemoglobin, assuming PO2 remains constant?A. Decreased PCO2, decreased temperatureB. Elevated levels of 2, 3 – DPGC. Low pHD. Decreased PCO2, increased temperatureE. Increased PCO2, decreased temperature
Question
Which of the following situations would result in the greatest degree of O2 saturation forhemoglobin, assuming PO2 remains constant?A. Decreased PCO2, decreased temperatureB. Elevated levels of 2, 3 – DPGC. Low pHD. Decreased PCO2, increased temperatureE. Increased PCO2, decreased temperature
Solution
The degree of O2 saturation for hemoglobin is influenced by several factors, including PO2, PCO2, temperature, pH, and the presence of 2,3-DPG.
A. Decreased PCO2, decreased temperature: Lower levels of carbon dioxide (PCO2) and lower temperatures both favor oxygen binding to hemoglobin, which would increase O2 saturation.
B. Elevated levels of 2, 3 – DPG: 2,3-DPG decreases hemoglobin's affinity for oxygen, which would decrease O2 saturation.
C. Low pH: A lower pH (which corresponds to higher acidity) decreases hemoglobin's affinity for oxygen, which would decrease O2 saturation.
D. Decreased PCO2, increased temperature: While lower levels of carbon dioxide (PCO2) favor oxygen binding to hemoglobin, higher temperatures decrease hemoglobin's affinity for oxygen. These two factors could potentially counteract each other.
E. Increased PCO2, decreased temperature: Higher levels of carbon dioxide (PCO2) decrease hemoglobin's affinity for oxygen, but lower temperatures favor oxygen binding to hemoglobin. These two factors could potentially counteract each other.
Given these considerations, the situation that would result in the greatest degree of O2 saturation for hemoglobin, assuming PO2 remains constant, would be option A: decreased PCO2 and decreased temperature.
Similar Questions
) In arterial blood with a PO2 of 60 mmHg, which of the following situations will resultin the lowest blood oxygen saturation?a) decreased DPG with normal body temperature and blood pHb) increased body temperature, acidosis, and increased DPGc) decreased body temperature, alkalosis, and increased DPGd) normal body temperature with alkalosise) increased body temperature with alkalosis
When reviewing the oxygen hemoglobin disassociation curve, what will a decrease in pH, increase in temperature and an increase in pCO2 have on hemoglobin binding with oxygen?Group of answer choicesthere will be an increase in oxygen release from hemoglobin---a right shiftthere is no change in binding even with these conditionshemoglobin will bind more avidly----a left shift
Which of the following does not shift the oxy-haemoglobin dissociation curve to the right?1. increased pH2. increased carbon dioxide3. increased temperature4. increased 2,3 -DPG
Which statement is true about the Oxygen - hemoglobin dissociation curve:Question 21Answera.Hemoglobin is likely to be fully saturated near resting cells/tissuesb.Hemoglobin is likely to be fully saturated near exercising cells/tissuesc.The curve would shift to the left when arterial CO2 is highd.The curve would shift to the right when body temperature decreasese.Hemoglobin stays nearly fully saturated at ≥70mmHg of PO2Clear my choice
5) Which of the following will cause the largest increase in systemic arterial oxygensaturation in the blood?a) an increase in red cell concentration (hematocrit) of 20%b) breathing 100% O2 in a healthy subject at sea levelc) an increase in arterial PO2 from 40 to 60 mmHgd) hyperventilation in a healthy subject at sea levele) breathing a gas with 5% CO2, 21% O2, and 74% N2 at sea level
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.