Question 21 of 21
Exposure to carbon monotide (CO) can lead to unoonsciouness and altimately deach. Suffocation occurs when hemoglobir half-saturated with CO . That is, wiffocution occurs when only two el every flow exygen-binding sites are occupied with CO suld Deach may occur at this point.
Why does death occur if half the exygen-binding sites are sill whilable lo ransport 
O_(2) ?
◻ The binding of CO shifts hemoglobins to the R sunc, malting in a higher affinity for exy
◻ The CO combines wid onygen molecules to form encriwe anousts of CO,
◻ Osce hernoglobin binds CO , it can only bind aditimal CO molecules, not 
O_(2).
◻ The kinding of CO stabliares the T state of herseglotin, multing in a lower affinity for exygen.