2007-02-20 13:38:17 · 4 answers · asked by Pat 2 in Science & Mathematics ➔ Medicine
It depends on the molecular characteristics. Any molecule (including fumes, toxins, etc) that is small and lipophilic has the potential to cross the BBB and enter the CNS. Large and polar/charged molecules have a much more difficult time crossing the BBB and are considered impermeable to CNS.
2007-02-20 23:15:45 · answer #1 · answered by citizen insane 5 · 0⤊ 0⤋
Chemical parameters of the molecule, like polarity, whether it is lipophilic, whether it is large or small, etc. determine whether a chemical passes the BBB.
For example in a lab, you can expect there to be many chemicals containing molecules of all different sizes, polarity, etc. Some are almost certain to get through.
2007-02-21 03:50:39 · answer #2 · answered by Think. 3 · 0⤊ 0⤋
foods,chemicals,pathogens, serial diluted pathogens can pass the blood brain barrier.bbb can also be compromised by repeated blows or concussive forces to the head.like parkinsons disease in an ex boxer.answer, ,,,,,,,,,,,,,,,,,,, no
2007-02-20 21:46:46 · answer #3 · answered by quackpotwatcher 5 · 0⤊ 1⤋
Not enough; people still get brain cancer and the like.
2007-02-20 21:53:38 · answer #4 · answered by sarcastro1976 5 · 0⤊ 2⤋