Sandbox DW1 009
From Proteopedia
(Difference between revisions)
| Line 54: | Line 54: | ||
This is the time when blood comes into action. Blood is a specialized body fluid that delivers necessary substances to the body's cells – such as nutrients and oxygen – and transports waste products away from those same cells. Because oxygen is not very soluble in blood, animals have an efficient mechanism for capturing oxygen, transporting, and releasing it by the inner cells: hemoglobin. | This is the time when blood comes into action. Blood is a specialized body fluid that delivers necessary substances to the body's cells – such as nutrients and oxygen – and transports waste products away from those same cells. Because oxygen is not very soluble in blood, animals have an efficient mechanism for capturing oxygen, transporting, and releasing it by the inner cells: hemoglobin. | ||
| + | |||
| + | <quiz display=simple> | ||
| + | {What structure in blood carries oxygen to the body's cells?} | ||
| + | - plasma | ||
| + | + haemoglobin | ||
| + | - deoxyribonucleic acid | ||
| + | - cytoplasm | ||
| + | |||
{{Clear}} | {{Clear}} | ||
===Hb, the mighty protein=== | ===Hb, the mighty protein=== | ||
Revision as of 12:22, 13 July 2010
Hello how are you?
|
| Hemoglobin causes Net Diffusion of Oxygen Oxygen diffuses freely across oxygen-permeable membranes, following the simple rule of equal pressure. By capturing oxygen, hemoglobin produces a change in the internal pressure of free oxygen, forcing the oxygen influx where it is needed. (interactive demo) |
Transport of Oxygen to Cells
How do we get the oxygen we breathe?
Oxygen is required by all aerobic animals as a basic mechanism to accept electrons and hydrogen ions produced during metabolism. Even when oxygen is all around us, in the air and in the water, oxygen need to be close to the cells where it's going to be used.
This is the time when blood comes into action. Blood is a specialized body fluid that delivers necessary substances to the body's cells – such as nutrients and oxygen – and transports waste products away from those same cells. Because oxygen is not very soluble in blood, animals have an efficient mechanism for capturing oxygen, transporting, and releasing it by the inner cells: hemoglobin.
