Choline acetyltransferase activity in the atria of the rat heart during training bradycardia.
The resting heart rate of rats trained for 19 weeks by swimming fell by 24% and the weight of their atria rose by 22%. Choline acetyltransferase in the atria did not alter significantly, however. In association with other findings, this observation supports the view that the bradycardia of training is not due to increased activity of cholinergic cardioninhibitory nerves.
D000110:Acetylcholinesterase / Q000378:metabolism*; D000818:Animals; D001835:Body Weight; D006325:Heart Atria / Q000201:enzymology; D006339:Heart Rate; D008297:Male; D009206:Myocardium / Q000201:enzymology*; D009929:Organ Size; D010805:Physical Conditioning, Animal; D051381:Rats
D000110:Acetylcholinesterase