parasimpática

Parasimpática refers to the parasympathetic nervous system, a major division of the autonomic nervous system. This system is responsible for the body's "rest and digest" functions, counterbalancing the "fight or flight" responses of the sympathetic nervous system. When the parasympathetic nervous system is activated, it promotes activities that conserve energy and restore the body to a calm state. Key functions include slowing the heart rate, decreasing blood pressure, stimulating digestion and the release of digestive enzymes, constricting pupils, and promoting urination and defecation. The primary neurotransmitter of the parasympathetic nervous system is acetylcholine. Its activity is crucial for maintaining homeostasis and recovering from stress. The parasympathetic nerves originate from the brainstem and the sacral region of the spinal cord. Overall, the parasympathetic nervous system plays a vital role in everyday bodily functions that are not under voluntary control, ensuring the body's efficient operation during periods of relaxation and recovery.