Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Resp. Physio

Hemoglobin and Oxygen Transport

QuestionAnswer
O2 transport oxygen is transported in blood in two ways:  dissolved in plasma (only 1.5% because O2 is poorly soluble in plasma)  bound to hemoglobin inside RBCs (98.5% is carried this way)
Hemoglobin hemoglobin (Hb) is a protein composed of 4 polypeptide chain subunits  each subunit is bound to an iron-containing heme group  since iron ions serve as oxygen-binding sites, each hemoglobin can rapidly and reversibly bind 4 oxygen molecules
Hemoglobin II a hemoglobin molecule bound with oxygen is called oxyhemoglobin (HbO2)  a hemoglobin molecule that has released its oxygen is called deoxyhemoglobin (HHb)
Hemoglobin and Oxygen Transport when the first oxygen molecule binds the first iron molecule, the hemoglobin changes shape and the affinity for the other 3 oxygen molecules progressively increases
Hemoglobin and Oxygen Transport II similarly, when the first oxygen is unloaded, the affinity for oxygen is decreased and it becomes progressively easier for the other 3 oxygen molecules to dissociate from the hemoglobin
Hemoglobin and Oxygen Transport III  hemoglobin is fully saturated when all four heme groups are bound to oxygen  if fewer than all four heme groups are bound, the hemoglobin is said to be partially saturated
Created by: zeenat