Bio 2

Bio 2

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  • Well, to understand how opioids such as heroin produce the feeling of happiness we have to understand what is dopamine and what these drugs do to your brain 
  • Daughter, this is my friend John, a professor who has done countless paper on the effect of heroin on the brain 
  • Thank you, Jim. Nevertheless, let's continue, heroin is what we call a central nervous system depressant and as you saw before it slows down a persons brain functions and breathing
  • As you know heroin has a lot of negative effects that harm the body but what I want to discuss is how it affects the brain 
  • Heroin affects the prefrontal cortex and medial temporal lobe of a long-term user of heroin. These are areas of the brain that are responsible for controlling memory, decision-making, self-control of social behavior and complex thought. Heroin overtime can affect your central nervous system which can lead to problems with rational thinking. memory, impulse control, and judgment
  • In the brain, there are many different neurotransmitters that transfer nerve impulses across synapses from one neuron to another. We have seen that there are receptors on the cell surface membrane of the second neuron, which have a shape into which the neurotransmitter molecules precisely fit. One group of these neurotransmitters is called endorphins. Endorphins help to reduce pain, affect mood  and reduce hunger.
  • As seen before heroin produces a sensation of euphoria. When it enters the brain, heroin is metabolized to morphine.  The morphine molecules then fit into some of the endorphins receptors this is what creates the feeling of happiness.
  • I now see why heroin is so bad
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