The mental and physical state of the smoker, and the situation in which smoking occurs, influence the way in which a cigarette affects psychological states and physiological responses.3. In order to provide a strong psychoactive reaction, nicotine must be delivered rapidly to the brain.
Redox Reactions Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid-base reactions. Fundamentally, redox reactions are a family of reactions that are concerned with the transfer of electrons between species.
Each redox reaction has an oxidation half and a reduction half. For example in the light reaction of photosynthesis. 2 NADP+ + 2H2O â 2 NADPH + O2 + 2H+. NADP+ getting reduced to NADPH is the reduction half and water giving rise to oxygen is the oxidation half.n plants the redox reactions take place within the thylakoid membranes of the chloroplasts. They utilize the light energy to synthesize ATP and NADPH. A set of redox reactions take place in mitochondria of animals. ATP is generated by the process of oxidative phosphorylation in animals.