Methylxanthines, uas yog caffeine, theobromine thiab theophylline muaj nyob hauv ntau yam dej haus thiab khoom noj xws li kas fes, cocoa, tshuaj yej thiab dej qab zib. Cov tshuaj no tuaj yeem muab cov txiaj ntsig zoo rau tib neeg tab sis kuj ua pov thawj tias muaj teeb meem feem ntau thaum noj ntau heev.
methylxanthines ua dab tsi?
METHYLXANTHINES. Methylxanthines nce chemoreceptor rhiab heev nrog rau kev ua pa ua pa thiab tuaj yeem txhim kho diaphragmatic contractilityNtawm cov tshuaj muaj, caffeine muaj ntau yam kev kho mob, muaj kev phiv tsawg dua, thiab cov txiaj ntsig zoo ntawm bradycardias dua theophylline.
Cov zaub mov twg muaj methylxanthines?
Caffeine (1, 3, 7-trimethylxanthine), theobromine (3, 7-dimethylxanthine), thiab theophylline (1, 3-dimethylxanthine) yog cov khoom muaj npe nrov tshaj plaws ntawm tsev neeg ntawm methylxanthines thiab muaj ib txwm muaj. hauv tea leaf, yerba mate, kas fes taum, cocoa taum, kola ceev thiab guarana berries.
Thaum twg koj noj methylxanthine?
Methylxanthines yog cov tshuaj bronchodilators uas tsis muaj zog uas tau siv los ua haujlwm. Lawv tau raug siv rau kho mob hnyav heevnrog rau kev tswj cov tsos mob hawb pob mus ntev. Feem ntau methylxanthine siv rau kev kho mob hawb pob yog theophylline.
Puas yog methylxanthines stimulant?
stimulants. Cov methylxanthines yog cov stimulants me me Tsis zoo li cov amphetamines thiab methylphenidate, uas yog synthetically tsim, cov tebchaw no tshwm sim nyob rau hauv ntau yam nroj tsuag thiab tau siv los ntawm tib neeg rau ntau centuries. Qhov tseem ceeb tshaj plaws ntawm lawv yog caffeine, theophylline, thiab theobromine.
