Explain how oxygen and carbon dioxide are transported in the blood. How does the means of transport relate to the solubility and chemical reactivity of these gases in plasma?
What will be an ideal response?
Oxygen is not highly soluble in water, which is the main component of plasma. Less than 2% is dissolved in
plasma, with the remainder bound to hemoglobin. The iron in the heme portion of the molecule can bind up to four
oxygen atoms. Oxygen is not chemically reactive in the body. Carbon dioxide is more soluble than oxygen, at about
7% dissolved. Carbon dioxide is chemically reactive, combining with water to form carbonic acid, which then
dissociates to bicarbonate and hydrogen ion. Most carbon dioxide is transported in the form of bicarbonate, about
70%, and the remaining 23% binds to amino acids on hemoglobin.
You might also like to view...
At any given time it is possible to see endocytotic vesicles docked to intracellular organelles such as those that may receive their contents for modification, synthesis, packaging, and then release. Which organelle would most likely be involved in this process as a destination for a transport vesicle formed for this purpose along the plasma membrane?
A. Golgi apparatus B. Mitochondrion C. Peroxisome D. Lysosome E. Ribosome
The maintenance of normal volume and composition of extracellular and intracellular fluids is vital to life. List and briefly describe the kinds of homeostasis involved
What will be an ideal response?
________ is an inherited abnormality that affects the development and structure of kidney tubules
A) Glomerulonephritis B) Polycystic kidney disease C) Nephrolithiasis D) Renal failure E) Hematuria
In which of the following areas of the nephron are most nutrients reabsorbed?
collecting duct distal convoluted tubule proximal convoluted tubule nephron loop