Search results
Results from the WOW.Com Content Network
Some evolutionary psychological theories concerning drug use suggest individuals consume drugs to increase reproductive opportunities. Drug use can increase reproductive fitness because drug use can (1) advertise biological quality, sexual maturity, or availability, (2) decrease inhibitions in mating contexts, and/or (3) enhance associative ...
3D model of 2-Arachidonoylglycerol, an endocannaboid. The endocannabinoid system (ECS) is a biological system composed of endocannabinoids, which are neurotransmitters that bind to cannabinoid receptors, and cannabinoid receptor proteins that are expressed throughout the central nervous system (including the brain) and peripheral nervous system.
The discovery of the first cannabinoid receptors in the 1980s helped to resolve this debate. [10] These receptors are common in animals. Two known cannabinoid receptors are termed CB 1 and CB 2, [11] with mounting evidence of more. [12] The human brain has more cannabinoid receptors than any other G protein-coupled receptor (GPCR) type. [13]
The plant hormone ABA plays an important role in activating signal transduction cascades and cell cycling and growth. An increase of ABC transporters in hemp plants contributes to increases in calcium concentration, indicating that calcium-binding proteins can control Cd concentration and absorption.
Pharmacognosy is the study of crude drugs obtained from medicinal plants, animals, fungi, and other natural sources. [1] The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical, chemical, biochemical , and biological properties of drugs, drug substances, or potential drugs or drug substances of natural origin ...
Many of these plants are used intentionally as psychoactive drugs, for medicinal, religious, and/or recreational purposes. Some have been used ritually as entheogens for millennia. [1] [2] The plants are listed according to the specific psychoactive chemical substances they contain; many contain multiple known psychoactive compounds.
A molecule that binds to a receptor is called a ligand and can be a protein, peptide (short protein), or another small molecule, such as a neurotransmitter, hormone, pharmaceutical drug, toxin, calcium ion or parts of the outside of a virus or microbe. An endogenously produced substance that binds to a particular receptor is referred to as its ...
Cannabis has various mental and physical effects, which include euphoria, altered states of mind and sense of time, difficulty concentrating, impaired short-term memory, impaired body movement (balance and fine psychomotor control), relaxation, and an increase in appetite. Onset of effects is felt within minutes when smoked, but may take up to ...