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Which neurotransmitter is responsible for the excitatory phase of muscle contraction a. dopamine b. serotonin c. GABA d. none of the above?
None of the above. The neurotransmitter responsible for the excitatory phase of muscle contraction is acetylcholine. It is released from motor neurons at the neuromuscular junction to stimulate muscle fibers.
Do all excitatory neurotransmitters have the same effect on organs?
No, not all excitatory neurotransmitters have the same effect on organs. Excitatory neurotransmitters can have specific functions and effects on different organs and systems in the body depending on their receptor types and distribution. For example, glutamate and acetylcholine are excitatory neurotransmitters with distinct roles in the nervous system and organs.
What amino acid looks like serotonin?
Tryptophan is an amino acid that can be converted into serotonin in the body. It is a precursor to serotonin, which means it is used to produce serotonin during the serotonin synthesis process.
What are the two excitatory neurotransmitters?
acetylcholine
Is noradrenaline excitatory?
Yes, noradrenaline is generally considered excitatory in the brain and central nervous system. It promotes arousal, alertness, and the "fight or flight" response by enhancing neuronal activity and transmission.
