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Depressants Meshael- Maisa - Sara O - Reema (Tolerance and Addiction,…
Depressants
Meshael- Maisa - Sara O - Reema
Inhalants
Mode of action
chemical fumes is inhaled that influence the CNS and act as a depressent on it.
Effects:
Short time:
nausea-vomiting
Long term:
memory loss,hearing loss ,vision problem ,peripheral nerve damage and death
Alcohol
Mode of Action:
1) Affect at least four different neurotransmitters
2) Resulting in a feeling of relaxation and sluggishness.
Effects:
Short term:
Use impairs judgment, coordination, and reaction time.
Long term:
Reduction in brain mass, liver damage, stomach and intestinal ulcers, and high blood pressure.
Cause of fetal alcohol syndrome
Illegal drugs
Cocaine
Side effects:
Increase dopamine levels and prevent it from being absorbed
Results in feeling of pressure and wellbeing
Long term effects:
Respiratory failure
Distribution in heart rhythm
Death
Mode of action:
As the chemical fumes is absorbed that influence the general impulses in the body and behaves as a depressants.
Amphetamines
Side effects:
Also increases the dopamine
Long terms effects:
Can lead to death
Disturbs breathing
Kidney and level failure
Mode of action:
violence behavior
Depressant
Drugs that tend to
slow down
the central nervous system
Effect :
lower blood pressure, interrupt breathing, and slow the heart rate
Depressants can relieve anxiety, but they also can cause the noticeable effect of sedation.
Tolerance and Addiction
Drug tolerance can lead to addiction.
The dosage needs to increase because the body becomes less responsive to the drug.
The psychological and physiological dependence on a drug
Dopamine normally is removed from a synapse as it is reabsorbed by the neuron that released it. However, certain drugs prevent that reabsorption, which results in an increase of dopamine in the brain.
A person addicted to drugs derives pleasure from increased levels of dopamine and builds up a tolerance to the drug. As a result, the person takes more of the drug.
Tolerance
Addiction