Answer:
It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.
It does not include plant sources.
The effect is called BIPHASIC RESPONSE.
When an individual start drinking alcohol and the BAC level is below 0.06 the person will be stimulated and relatively happy, but when the BAC rises above this level, the person will feel down and depressed. The response is called biphasic because the two events[that is, feeling high and feeling down] occur within a time frame period.
Dodo bird, Passenger Pigeon, and Tasmanian Tiger. Hope this helps!
