25. The precursor for the neurotransmitters L-DOPA, Dopamine, Norepinephrine and Epinephrine · is:1 + a) histidineT + b) tryptophanT + c) tryosineT + d) adenosine triphosphate 26. Neuropeptide...

please answer 25,26

Extracted text: 25. The precursor for the neurotransmitters L-DOPA, Dopamine, Norepinephrine and Epinephrine · is:1 + a) histidineT + b) tryptophanT + c) tryosineT + d) adenosine triphosphate 26. Neuropeptide transmitters that act as natural opiates to reduce pain perception under certain stressful conditions are called: T + a) choline acetyltransferasesT + b) endorphins and enkephalins T + c) adenylate cyclases + d) glutamatesT