Drugs can be eliminated directly from the body or first decompose into substances whose metabolites are less likely to be re-absorbed. These secondary substances are

In medicine, this method usually replaces the ingestion, if the substance can adversely affect the digestive tract. Acceptance through the skin is not particularly effective

As noted in Chapter 2, the most important thing that determines the effect of a substance entering the body is its quantity (these are components

Converted, or “designer” drugs – synthetic substances obtained by a slight change in the chemical structure of an already known drug. If the drug retains

Thalamus and Hypothalamus. From the point of view of studying the effects of drugs, the forebrain, which includes the thalamus, hypothalamus and some other structures,

Three important neurotransmitters belonging to the same amino group are called monoamines, norepinephrine (norepinephrine), dopamine and serotonin. Like acetylcholine, norepinephrine was discovered long ago, because it

Of all the neurotransmitters, acetylcholine was one of the first to be discovered, possibly because it is located in the most convenient neurons for studying,

There are many ways in which drugs can interfere with impulse transmission. Suppose that the chemical structure of a drug is very similar to the structure

At the ends of the axon are small thickenings – nerve endings. In them lies the answer to the question of how electrical impulses are transmitted

The simplest components of the nervous system are cells called neurons. They are in many ways similar to other cells of the human body, such as