To trigger bronchodilation, the PO2 in the blood should be low PO2 in the lungs should be high. PCO2 in the lungs should be high. pH levels in the red blood cells should be high. PCO2 in the blood should be low.
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- A partial pressure gradient of oxygen exists between ________. a. air and lungs b. lungs and metabolically active tissues c. air at sea level and air at high altitudes d. all of the aboveOf the following, which does not explain why the partial pressure of oxygen is lower in the lung than in the external air? Air in the lung is humidified; therefore, water vapor pressure alters the pressure Carbon dioxide mixes with oxygen Oxygen is moved into the blood and is headed to the tissues Lungs exert a pressure on the air to reduce the oxygen pressure.Carbon monoxide (CO) is a colourless, odourless gas that result from the burning of hydrocarbons, such as in a poorly functioning furnace or vehicle emissions. CO can bind with hemoglobin to form carboxyhemoglobin. Hemoglobin's affinity for CO is 200 times greater than its affinity for oxygen. The initial symptoms of carbon monoxide poisoning are flu-like, such as dizziness, headache and vomiting. However, when left unchecked, CO poisoning can result in unconsciousness, loss of blood flow to the vital organs and, eventually, death. (Source: Bleecker, M.L. (2015). Carbon Monoxide Intoxication. Handbook of Clinical Neurology. Elsevier B.V.) 5. Name the gases normally carried by hemoglobin in the body. Using your knowledge of the circulatory and respiratory systems, provide a possible explanation for the symptoms of carbon monoxide poisoning.
- With the Bohr effect, more oxygen is released to the tissues because: a decrease in pH weakens the hemoglobin-oxygen bond a decrease in pH strengthens the hemoglobin-oxygen bon Oan increase in pH strengthens the hemoglobin-oxygen bond an increase in pH weakens the hemoglobin-oxygen bondThe transport and exchange of gases in the body is affected by the Bohr effect. Which of the following statements best describes the Bohr effect? The Bohr effect lowers the oxygen affinity of haemoglobin and is caused by an activity induced increase in pH in the active muscles. The Bohr effect lowers the oxygen affinity of haemoglobin facilitating its release in oxygen starved tissues. The Bohr effect facilitates oxygen transport to oxygen starved tissues as it increase’s the affinity of haemoglobin for oxygen. The Bohr effect lowers the oxygen affinity of haemoglobin resulting in a reduction in oxygen availability in the active muscles.Which of the following is the BEST definition for the Haldane effect? O Carbonic anhydrase converts CO2 into bicarbonate and hydrogen ions O Increased concentration of CO2 decreases hemoglobin affinity for oxygen Decreased PO2 increases hemoglobin affinity for CO2 CO2 binds to hemoglobin as oxygen concentration decreases Decreased pH decreases hemoglobin affinity for oxygem
- A healthy person is given 100% oxygen instead of 21%. Which of the following will be true in this person?Dissolved form of O2 will increase but attached O2 with Hb can increase maximum to 100%the dissolved form of O2 will decrease and attached O2 with Hb will increasePaO2 will become 200mmHgattached form of O2 with Hb will double Oxygen carried in dissolved form will not changeTo demonstrate an understanding of oxyhemoglobin binding, insert a word from the list in each blank to complete the statements. Not all terms will be used. increased A right shift of the oxy-hemoglobin curve signifies a affinity for oxygen. hold acidic A temperature will cause a right shift of the oxy- hemoglobin curve. basic A more pH than normal blood pH will cause a right shift higher of the oxy-hemoglobin curve. As a person exercises, their muscles give off heat which raises the temperature of the blood. This will cause hemoglobin to more oxygen at the cells. lower release decreasedWhen the blood passes through the lungs, CO₂ is expelled and the hemoglobin picks up oxygen. Place the following steps in the correct order (1 = first thing to happen), assuming that it is the decreased [CO₂] during exhalation that initiates the transition. Carbonic anhydrase works to restore the CO₂/bicarbonate equilibrium, reducing the [H+] The T-state is less stabilized. Oxygen binds to the hemoglobin. Protons dissociate from the hemoglobin.
- Which of the following is TRUE of carbon monoxide poisoning? Group of answer choices choose one answer Carbon monoxide is toxic because it binds more readily to hemoglobin than oxygen, thereby decreasing the oxygen carrying capacity of blood. As the carbon dioxide content of blood increases, a phenomenon known as the Haldane effect converts the excess carbon dioxide to carbon monoxide until it reaches toxic levels. Carbon monoxide is toxic because it readily picks up oxygen to produce carbon dioxide, causing acidosis and eventual death. Carbon monoxide causes the carbamino effect where carbon dioxide is stripped of an oxygen, producing carbon monoxide.If a respiratory pigment such as hemoglobin or hemocyanin is not present in blood the blood would not carry carbon dioxide the blood would have decreased oxygen carrying capacity the blood would not carry oxygenIn terms of acid/base balance, carbon dioxide represents an in the bodyObstructive respiratory pathologies result inof CO2 and would most likely cause a respiratory
