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INFO: Full form for BARC is Build A Rescue Clinic in Medical category
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INFO: Full form for BAR is Bright, Alert, and Responsive in Medical category
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A barbiturate is a drug that acts as a central nervous system depressant. Barbiturates are effective as anxiolytics, hypnotics, and anticonvulsants, but have physical and psychological addiction potential as well as overdose potential among other possible adverse effects. They have largely been replaced by benzodiazepines and nonbenzodiazepines ("Z-drugs") in routine medical practice, particularly in the treatment of anxiety and insomnia, due to the significantly lower risk of addiction and overdose and the lack of an antidote for barbiturate overdose. Despite this, barbiturates are still in use for various purposes: in general anesthesia, epilepsy, treatment of acute migraines or cluster headaches, acute tension headaches, euthanasia, capital punishment, and assisted suicide.

The name barbiturate originates from the fact that they are all chemical derivatives of barbituric acid.

INFO: Full form for BAR is Body Alarm Reaction in Medical category
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INFO: Full form for BBB is Behandia Blodtryck Battre study in Medical category
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The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that prevents solutes in the circulating blood from non-selectively crossing into the extracellular fluid of the central nervous system where neurons reside. The blood–brain barrier is formed by endothelial cells of the capillary wall, astrocyte end-feet ensheathing the capillary, and pericytes embedded in the capillary basement membrane. This system allows the passage of some small molecules by passive diffusion, as well as the selective and active transport of various nutrients, ions, organic anions, and macromolecules such as glucose and amino acids that are crucial to neural function.

The blood–brain barrier restricts the passage of pathogens, the diffusion of solutes in the blood, and large or hydrophilic molecules into the cerebrospinal fluid, while allowing the diffusion of hydrophobic molecules (O2, CO2, hormones) and small non-polar molecules. Cells of the barrier actively transport metabolic products such as glucose across the barrier using specific transport proteins. The barrier also restricts the passage of peripheral immune factors, like signaling molecules, antibodies, and immune cells, into the CNS, thus insulating the brain from damage due to peripheral immune events.

Specialized brain structures participating in sensory and secretory integration within brain neural circuits—the circumventricular organs and choroid plexus—have in contrast highly permeable capillaries.

INFO: Full form for BBB is Bundle Branch Block in Medical category
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INFO: Full form for BBB is Body Balanced Board in Medical category
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INFO: Full form for BCA is Balloon Catheter Angioplasty in Medical category
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INFO: Full form for BCA is Balloon Coronary Angioplasty in Medical category
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INFO: Full form for BCA is Barrett’s adenocarcinoma in Medical category
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INFO: Full form for BCA is Basal Cell Adenoma in Medical category
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INFO: Full form for BCA is Basic Credit Approval in Medical category
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INFO: Full form for BCA is Bilateral Cemented Arthroplasty in Medical category
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