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Vagusstoff (literally translated from German as "Vagus Substance") refers to the substance released by stimulation of the vagus nerve which causes a reduction in the heart rate. Discovered in 1921 by physiologist Otto Loewi , vagusstoff was the first confirmation of chemical synaptic transmission and the first neurotransmitter ever discovered.
Vagusstoff transmitted inhibition from the vagus nerves, and Acceleransstoff transmitted stimulation from the sympathetic nerves to the heart. [31] Loewi took some years to commit himself with respect to the nature of the Stoffe , but in 1926 he was sure that Vagusstoff was acetylcholine, writing in 1936 [ 32 ] "I no longer hesitate to identify ...
He called the unknown chemical Vagusstoff, naming it after the nerve and the German word for substance. It was later found that this chemical corresponded to acetylcholine . His experiment was iconic because it was the first to demonstrate the endogenous release of a chemical substance that could cause a response in the absence of electrical ...
The 20th century saw major advances in the participation of women in sports due to a growing women's sports movement in Europe and North America. This led to the initiation of the Women's Olympiad (held three times 1921 , 1922 and 1923 ) and the Women's World Games (held four times ( 1922 , 1926 , 1930 and 1934 .
Men can do the same,” says Alex Robboy, a sex therapist in Philadelphia. Essentially, kegel exercises are a way of contracting the muscles of the pelvic floor, which give you greater control and ...
The late 19th century saw increasing debates about the commercialization and integrity of sports. Sports preferences varied by region, with baseball popular in the Northeast and football in the Midwest. Women's involvement in sports, such as tennis and golf, began to increase toward the end of the century. By the late 19th century, American ...
World Tour, recently did an X Spaces chat where she addressed rumors that she’s been using the medication to lose weight. In it, the 24-year-old made it clear she’s not here for the speculation.
The classifications of substances as performance-enhancing substances are not entirely clear-cut and objective. As in other types of categorization, certain prototype performance enhancers are universally classified as such (like anabolic steroids), whereas other substances (like vitamins and protein supplements) are virtually never classified as performance enhancers despite their effects on ...