|
|
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
There are more sensory neurons in the tongue than in any other part of the body.
Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
![DNA analysis of phylogenetic relationships among modern and extinct flightless birds by Cooper and c](https://biology-forums.com/gallery/47/medium_33_15_07_11_12_07_20.jpeg)
![A simulated-color map of the surface of Venus as measured by synthetic aperture radar on the Magella](https://biology-forums.com/gallery/47/medium_12359_17_05_12_12_40_57.jpeg)
![GI series. (a) Upper GI series begins with a barium swallow, barium shake, or barium meal. (b) Lower](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_23_55_96931000.jpeg)