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GSM is a second-generation (2G) standard employing time-division multiple-access (TDMA) spectrum-sharing, issued by the European Telecommunications Standards Institute (ETSI). The GSM standard does not include the 3G Universal Mobile Telecommunications System (UMTS), code-division multiple access (CDMA) technology, nor the 4G LTE orthogonal ...

The biological basis of the study of physiology, integration refers to the overlap of many functions of the systems of the human body, as well as its accompanied form. It is achieved through communication that occurs in a variety of ways, both electrical and chemical. [7] Changes in physiology can impact the mental functions of individuals.

Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements.. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols.

This page in a nutshell: Ideal sources for biomedical articles include general or systematic reviews in reliable, third-party, published sources of reputable medical journals, widely recognised standard textbooks written by experts in a field, or medical guidelines and position statements from nationally or internationally reputable expert bodies.

BLS: Basic Life Support ( not intended for postnominal use) BDLS: Basic Disaster Life Support. BCEN: Board of Certification for Emergency Nursing ( not intended for postnominal use) BM: Bachelor of Midwifery. BMTCN: Blood and Marrow Transplant Certified Nurse. BN: Bachelor of Nursing. BNSc: Bachelor of Nursing Science.

Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. [11] It is used as a cognitive enhancer, increasing alertness and attentional performance. [12] [13] Caffeine acts by blocking binding of adenosine to the adenosine A1 receptor, which enhances release of the neurotransmitter acetylcholine. [14]