Marijuana and the Biological Bases of Behavior Essay

THC disrupts the nerve cells in the part of the brain where memories are formed. This makes it hard for the user to recall recent events (such as what happened a few minutes ago), and so it is hard to learn while high. A working short-term memory is required for learning and performing tasks that call for more than one or two steps. Some studies show that when people have smoked large amounts of marijuana for many years, the drug takes its toll on mental functions. Among a group of long-time heavy marijuana users in Costa Rica, researchers found that the people had great trouble when asked to recall a short list of words (a standard test of memory). People in that study group also found it very hard to focus their attention on the tests

Smoking of marijuana can cause the person to become addicted to cocaine, heroin, and other drugs. Heavy or daily use effects the parts that control memory, attention, and learning (Facts for Teens, 13). When teens are 12 and 13 they are more exposed to drugs and most likely don’t listen to their parents (Age in Stem., 1). Some other psychological side effects would be paranoia, anxiety, fatigue, Euphoria, and mood swings (Fact Sheet, 1). Studies have shown that when a person uses marijuana it causes the heart to beat faster and work harder (Fact Sheet, 2). When people have smoked large measures of marijuana for years, the drugs takes its charge on mental functions (Facts for Teens, 13).

Millions are abusing marijuana every day. In fact, 1 out of 7 high school students smoke marijuana more than once a day. Marijuana is taken very lightly and is the most highly used illegal drug. For this reason, society should know its short and long term effects on the brain. Marijuana can effect these two areas emotionally or physically. Also in some cases physical damages causes the emotional response. Although most public information on drugs are funded by anti-drug organizations, hopefully we will still learn these true facts of marijuana in spite of that.

Marijuana is the third most popular recreational drug in America, after alcohol and nicotine products. It is a greenish-gray mixture of the dried, shredded leaves and flowers of cannabis sativa, the hemp plant. The main psychoactive part of cannabis is tetrahydrocannabinol or also known as THC. It contains THC as well as over a hundred other cannabinoids. THC is a psychoactive chemical. Marijuana is often used for its mental and physical effects such as a “high” or a “stoned” feeling. It has been know that there are benefits to using marijuana such as euphoria or heightened mood, increased appetite and many others. However there are short term side effects which may include dry mouth, decrease in short term memory, red eyes and often

Marijuana is a mixture of the dried parts of the cannabis sativa hemp plant. Excessive marijuana use can lead to an addiction. The main chemical in marijuana is tetrahydrocannabinol (THC), which moves quickly through the bloodstream and to the brain, causing mild hallucinogenic effects. THC binds with cannabdnob receptors and activates neurons, which causes adverse effects on the mind and body. THC can mimic or block actions of neurotransmitters and interfere with normal functions. Marijuana use can lead to disturbed thoughts and can worsen psychotic symptoms. The short-term effects of marijuana include impaired coordination; skewed sensory and time perception; difficulty with thinking; shortened attention span and distractibility; impaired learning and memory. Long term users of marijuana often experience lowered motivation and some can experience anxiety, panic attacks, respiratory illness, and increased heart rate and risk of heart attack.

Marijuana has been used in the treatment of AIDS, cancer, glaucoma, multiple sclerosis, and chronic pain ("Medical Cannabis."). Researchers have been trying to explain the negative effects that marijuana can have on the central nervous system and how it hinders memory as well. The constant reports of short-term memory loss by heavy marijuana users brings up the question, is it the most common long term effect of marijuana use? Although it is said that marijuana has many effects such as exhaustion, increased appetite, offset sense of time, and bloodshot eyes, short-term memory loss is the symptom most frequently linked with the use or ingestion of marijuana. But why? Why does using marijuana have any impact on a person’s memory at all? Countless scientists have been working tirelessly to find an answer for this question. The active ingredient in marijuana, THC, is known to attach itself to areas of the brain linked to memory. When the scientists injected lab animals with THC at Rutgers University, they found that they acted as though there was no rhythm to their thought. It affected the hippocampal circuits in the brain to produce animals that were acting normal but in a delayed or offset manor.

Marijuana does impair short-term memory, but only during intoxication. Although the authoritative studies on marijuana use seem to agree that there is no residual impairment following intoxication, persistent impairment of short-term memory has been noted in chronic marijuana smokers, up to 6 and 12 weeks following abstinence.

Marijuana in the late 1960s’ had only one percent of tetrahydrocannabinol, compared to present day where Health Canada has discovered there is at least 10 percent of tetrahydrocannabinol and 30 percent in some cases. The tetrahydrocannabinol is a strong chemical and works immediately after one has inhaled it. Tetrahydrocannabinol mimics the neurotransmitter anandamide, which fills in the synapse between neurons and this disrupts the brain’s regular functions. In a normally functioning brain, anandamide activates the cannabinoid receptors but when smoking marijuana tetrahydrocannabinol activates these receptors which are in the hippocampus, cerebellum and basal ganglia. This affects the short-term memory, coordination, and learning and problem-solving skills for an individual. Brain development is also affected by the use of cannabis. Dr. Harold Kalant conducted a study in the 1980s’ with rats and cannabis use. He separated the rats into two groups; rats exposed to cannabis at adolescents and rats exposed to cannabis in adulthood. Kalant observed the rats exposed to cannabis as adolescents, had difficulty with memory and learning even after nine years of no exposure. In comparison, the rats who were adults when exposed to cannabis didn’t have long term effects. It is evident that brain development was disrupted by the use of cannabis in the growing years. Also, Dr. Andra Smith saw in her functional magnetic resonance imaging of brain activity of regular cannabis smokers and non-smokers, that the smokers had a more brain activity. She stated it was due to the brain having to work hard to “respond accurately”. It is obvious that brain function and development is harshly impacted by the use of

THC, the active ingredient in pot works on specific parts of the brains hardware, called cannabinoid receptors. Turning on a cannabinoid receptor with THC creates a bunch of cellular reactions that at last create to the "high" that you feel when you smoke weed. Cannabinoid receptors exist throughout the brain. They are most common in parts The areas of the brain that influence pleasure, time, memory, and concentration have the highest concentration of these receptors. Smoking weed frequently can overpower

The effects of marijuana have been examined in several studies that focused on long-term structural differences, cognitive impairments, prenatal risks and neural functioning deficits. Long-term structural abnormalities include reductions in the volume of the hippocampus, amygdala and nucleus accumbens, where these structures also exhibited changes in density and shape. Participants in several studies showed impairment in memory, learning, concentration, coordination, as well as decreased motivation. Marijuana has addictive properties and has dramatically increased in potency over the last decade, which has led to an increase in marijuana-related fatal car accidents and to an increase in emergency room visits. On the contrary, the non-psychoactive

Marijuana is a drug plant that is either crushed into pieces or rolled using a plant, like a cigarette, or a person can eat the plant. Marijuana acts on specific cannabinoid receptors in the brain (Pharmacology Marijuana). It affects the brain causing psychological effects, such as euphoria. As well as, a person taking this drug may experience depression, anxiety, hallucinations, and vision problems. Also, marijuana affects the body also causing the person to experience physical effects include reddening of the eyes, dryness of the mouth and throat, increase the heartbeat, tightness of the chest (if the drug is smoked), drowsiness, unsteadiness, and muscular incoordination (Pharmacology Marijuana). In the brain contains THC, and marijuana

There are several chemical processes involved when marijuana enters the brain, and it is important to know what these processes are in order to better understand marijuana’s adverse effects on memory. Though there are many chemicals in marijuana, there are only two main ingredients linked directly to the cognitive effects of the drug. The principal psychoactive component in cannabis is delta 9-tetrahydrocannabinol (Δ9-THC), it is linked to the adverse effects of the drug on various cognitive functions, including memory (Schoeler and Bhattacharyya, 2013). The second

     Short-term memory is very important in our everyday lives. It is what allows people to remember many various things such as, phone numbers, directions to a friends house, and so on. Short-term memory impairment is fairly obvious with marijuana users. Many of the times users frequently forget the beginning of a conversation, or even the beginning of a sentence, but regularly they are still able to complete what they were saying without any knowledge of the topic (Tart, 2001). It is still unknown why this happens, but it is feasible that it relates back to the problem of too much information being processed faster then usual, allowing for distractions to take over the person’s mind, making them forget what they were originally talking about.

The article, “Marijuana and the Teen Brain”, from the Scientific American journal, Claudia Wallis, argues that marijuana negatively affects the teenage brain. Wallis begins her argument by stating her viewpoint on the drug and then proceeds to provide information to support her stance. Multiple studies by scientists/researchers are cited in this article including those based on x-rays of a marijuana user’s brain and others that tested marijuana users on their cognitive skills. Wallis additionally mentions a study on rats which tested the effects of THC. The author provides background information on marijuana to give the reader a better understanding of the concept. This source supports the argument that marijuana use has negative impacts on the human brain because the author also stands behind that argument. Wallis discusses these negative impacts and provides evidence to support her claim. This source cites various studies in which researchers tested the effects of marijuana on the brain which reinforces the argument that marijuana has abnormal effects on the human brain.

Many regions of the brain contain cannabinoid receptors, of which anandamide molecules, concerned with regulating mood, appetite and emotions, naturally bind to. Cannabis contains an active ingredient known as ‘delta-9-tetrahydrocannabonic’ (THC), and when smoked or eaten, the THC imitates the activity of anandamide by binding to cannabinoid receptors on nerve cells, and therefore influences