Drugs : The Function Of The Body Essay

Drugs : The Function Of The Body Essay

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Drugs alter the function of the body. The abuse of drugs changes the way people feel, think and behave by disrupting neurotransmission. Neurotransmission is the brains means of communication. Neurotransmitters are the brains chemical messengers. These nerve networks regulate and coordinate everything we think, feel, and do. Drug dependence and addiction cause disruptions of neurotransmission. The negative effects on neurotransmission explain the physiological dependence. Extended use of drugs alters the chemical balances in the brain effecting both neurons and brain circuits. Drugs can damage your brain’s processing abilities by impeding on nerve impulses, stopping neurotransmitters from getting where they 're supposed to be, or producing too little or too many neurotransmitters. As a result, neurons may be over-stimulated or not stimulated at all, impairing the nervous system 's ability to carry out its functions. The alternation of neurotransmission, caused by addictive drugs produces effect that make people want to continue to abuse them and create health problems that can be long-lasting and costly.
To understand what is neurotransmission it is important to first understand what is the nervous system and the messenger cells within the system, neurons. The nervous system contains two systems the central nervous system and the peripheral nervous system. The central nervous system is comprised of the brain and spinal cord. The brain is a complex organ made up of a team of parts including the brain stem, the cerebral cortex, and the limbic system. Each part has different functions. The brain stem is in charge of basic life functions such as breathing, heart rate, and sleeping. The cerebral cortex is separated into areas that regul...


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Endogenous cannabinoids are neurotransmitters that may contribute in important ways to cognition, memory, movement, pain and other physiological processes. Endogenous cannabinoid neurotransmitters are affected by marijuana. The THC in marijuana creates drowsiness of sedatives like alcohol, a dulling of pain similar to opiates, and in some cases with high doses perception-distorting effects.
Glutamate is major excitatory neurotransmitter that associated with an increase in neuron activity, cognition, learning and memory. Glutamate is a concerned to be one of the most abundant and important neurotransmitters to normal brain function. Alcohol, ketamine (a dissociative anesthetic), and phencyclidine all create imbalances of glutamate in the brain. It is believed that low levels are associated with Alzheimer’s disease, the first symptoms being memory malfunctions.

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