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.

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.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter11: The Blood

Section: Chapter Questions

Problem 1SQE

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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 above
To 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 decreased
Which of the following statements is correct of BOTH haemoglobin and myoglobin? Acidic conditions increase the affinity for oxygen. The iron atom of the heme prosthetic group is bound to nitrogen atoms at five of six coordination sites. Four oxygen molecules bind to each subunit. Quaternary structure is found in both haemoglobin and myoglobin. Both haemoglobin and myoglobin show the same oxygen binding affinity at different
In addition to O2 binding, changes in other chemical conditions can result in changes in hemoglobin structure and function. Increases in blood H+ result in oxygen binding curves for hemoglobin that are shifted to the right. The effect of H+ can be understood in terms of the equilibrium:H-Hb+ + O2 → Hb-O2 + H+How does the difference in pH in the lungs and tissues help hemoglobin do its job of delivering oxygen? Use the equilibrium equation in your argument.
When 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.
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 bond
Which of the following statements about oxygen transport is TRUE. Increases in temperature and decreases in pH cause myoglobin to release oxygen to improve delivery to the hemoglobin in muscles. A molecule of myoglobin has higher oxygen binding capacity than a molecule of hemoglobin. Myoglobin has a higher oxygen affinity than does hemoglobin. Fetal hemoglobin has a lower affinity for oxygen than maternal hemoglobin, which makes it better suited to extract oxygen from the maternal circulation.
Which of the following statements regarding the transport of oxygen by hemoglobin is correct? Upon binding of oxygen to heme, a shift in the position of the distal His ultimately induces the switch from T to R states When fully bound to oxygen, AG(R-state)
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
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.
Crocodiles can use virtually 100% of the oxygen in its blood, whereas humans can extract only about 65% of the oxygen in their blood. Crocodile hemoglobin (Hb) binds HCO3, rather than 2,3-bisphosphoglycerate (BPG), when in the T-state. Which of the following best explains why HCO3¯ in the crocodile works better than 2,3-BPG in humans to help the Hb to release more of its bound oxygen? Crocodile Hb binds more oxygen than human Hb, and so the crocodile has more oxygen available than humans do. The [HCO3] varies with the amount of oxygen used, whereas the [BPG] in human erythrocytes is constant regardless of need. Humans require their hemoglobin to be sensitive to [BPG] in order for HbF (fetal Hb) to have a higher affinity for oxygen than maternal Hb. Since crocodile Hb binds HCO3, the HCO3 will not be available to bind to H+ (Bohr protons), and so more oxygen will be released to the tissues. Crocodiles are cold-blooded and so do not need as much oxygen as humans; this is why they can…
Which of the following are TRUE, when describing the Transport of CO2 in the body? Select ALL that are true. The diffusion of CO2, from metabolically active tissue, into the plasma and the Red Blood Cell, is enhanced by the formation of Carbamino Bonds with plasma proteins and Haemoglobin. CO2 diffuses from metabolically active tissue, into the plasma, where it is rapidly converted to bicarbonate (HCO3-) by he enzyme Carbonic Anhydrase. Bicarbonate (HCO3-), formed in the Red Blood Cell, is transported into the Plasma by the Chloride-Bicarbonate Shuttle. Bicarbonate (HCO3-) diffuses from metabolically active tissue into the plasma, and from the plasma into the Red Blood Cell. CO2 diffuses from metabolically active tissue, into the plasma, and into the Red Blood Cell, where it is rapidly converted to bicarbonate (HCO3-) by he enzyme carbonic Anhydrase. O At the lung, Bicarbonate (HCO3-) in the Plasma is transformed to CO2 by the enzyme Carbonic Anhydrase, reducing the amount of…

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		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.