The ossicles are classically supposed to mechanically convert the vibrations of the eardrum, into amplified pressure waves in the fluid of the cochlea (or inner ear) with a lever arm factor of 1.3.
Addiction researchers have consistently reported that marijuana is far less addictive than alcohol based on a number of factors. In particular, alcohol use can result in significant and potentially fatal physical withdrawal, whereas marijuana has not been found to produce any symptoms of physical withdrawal.or example, one recent study found that teens who used marijuana as well as alcohol suffered significantly less damage to the white matter in their brains. Of course, what is beyond question is that alcohol damages brain cells. 5. Alcohol use is linked to cancer.
Although GABA activity doesn't entirely explain alcohol's effects and we don't know exactly what the delta receptor does, a big part of the mystery seems to have come unraveled. Because GABA is the primary inhibitory neuron in the brain, it can affect virtually every system. Alcohol is more than simply a depressant. The physical structure of the brain remains constant, but the addition of a tiny chemical drastically alters brain function and ultimately behavior. Understanding how alcohol affects our brain also offers insight into how our brains work in general. So the next time you drink, even though you may be killing some valuable brain cells, you can toast to the fact that you're contributing to neuroscience. Notes: Giancola PR, Zeichner A. The biphasic effects of alcohol on human physical aggression. J Abnorm Psychol. 1997 Nov;106(4):598-607. McDougle CJ, Krystal JH, Price LH, Heninger GR, Charney DS.