the autonomic (involuntary) nervous system controls the rate at which the heartbeats. sympathetic (fight or flight) signals speed up the heart’s rate while parasympathetic (rest and digest) signals slow it down. The part or parts of the heart that forms sympathetic and parasympathetic neurons form synapses is called cardiac plexus.
Cardiac plexus is a plexus of the nerves that are present at the base of the heart and is divided into superficial and deep part. The sympathetic and the parasympathetic nerves form synapses with heart in the form of cardiac plexus.
The sympathetic nerves are responsible for activating flight or fight mode while parasympathetic nerves are responsible for restoring the normal body state.
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La hebra complementaria debe tener 5 millones de nucleótidos, porque cada nucleótido tiene una base nitrogenada, y la hebra complementaria debe tener la misma cantidad de bases nitrogenadas que la hebra original. (Recuerda que las dos hebras "encajan" una con otra).
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