To become bound to hemoglobin for transport in a mammal, atmospheric molecules of oxygen must cross
A) zero membranesoxygen binds directly to hemoglobin, a protein dissolved in the plasma of the blood.
B) one membranethat of the lining in the lungsand then bind directly to hemoglobin, a protein dissolved in the plasma of the blood.
C) two membranesin and out of the cell lining the lungand then bind directly to hemoglobin, a protein dissolved in the plasma of the blood.
D) four membranesin and out of the cell lining the lung, in and out of the endothelial cell lining the pulmonary capillary–and then bind directly to hemoglobin, a protein dissolved in the plasma of the blood.
E) five membranesin and out of the cell lining the lung, in and out of the endothelial cell lining the pulmonary capillary, and into the red blood cellto bind with hemoglobin
Actions of regulatory transcription factors and small effector molecules
Non-Carbon Organic Molecules
Two oxygen molecules in van der Waals contact
Oil molecules cling to metal surfaces but easily slide against each other.
A summary of terminology describing the structure of sugar molecules
A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is: