despite d diffused rejection and moral condemnation of drinking and smoking both have important biochemical functions in the body.NOTE:
REMEMBER THAT SMOKERS ARE LIABLE TO DIE YOUNG AND THAT ALCOHOL HAS ITS OWN DISADVANTAGES.
alcohol
like oda food sources e.g proteins, alcohol is a source of energy.alcohol produces 7kcal/g which is higher dan dat of carbohydrates and proteins(each with 5kcal/g), and lower only to dat of fats(9kcal/g).therefore alcohol gives more energy than carbohydrates and proteins.
smoking
cigarette,cigar,marijuana etc contains nicotine.when we smoke, d nicotine acts on the parasympathetic glands to produce noradrenaline(or norepinephrine).this is latter converted to adrenalin. the adrenalin activates an enzyme called adenylyl cyclase which catalizes the breakdown of stored glycogen to free glucose and glucose-6-phosphate, d duo which are later converted to pyruvate for entry into the TCA cycle wia they generate energy. the energy generated is partly used to warm d body and d rest is available for oda human activitiese.g fighting. that is why people take cigarette on cold periods and why people say that marijuana for instance gives power(energy)
By joshua(dept.of Biochemistry,UNN)

LOL!!! dis is funi. jst like d biochemistry of luv. i guess uve bn listening to Prof. Nwodo for too long