Sympathetic Nervous System (Noun)
Meaning
Originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels.
Classification
Nouns denoting body parts.
Examples
- The sympathetic nervous system originates in the thoracic regions of the spinal cord and plays a crucial role in our body's fight or flight response.
- Activation of the sympathetic nervous system leads to an increase in heart rate, which allows more oxygenated blood to reach the muscles.
- The sympathetic nervous system opposes the physiological effects of the parasympathetic nervous system, resulting in a reduction in digestive secretions during periods of stress.
- When stimulated, the sympathetic nervous system contracts blood vessels, leading to increased blood pressure and a redirection of blood flow to vital organs.
- During times of intense fear or stress, the sympathetic nervous system speeds the heart, preparing the body for the physical demands of fighting or fleeing from danger.