What occurs during sympathetic activation in the body?
Understand the Problem
The question is asking about the physiological changes that occur in the body during sympathetic activation, which is part of the autonomic nervous system response. The correct answer would explain how the body responds to stress or danger by increasing heart rate and slowing digestion.
Answer
Increased heart rate, force of contraction, pupil dilation, sweating, vasoconstriction or vasodilation.
During sympathetic activation, the heart rate, force of contraction, and rate of conduction increase. Cardiac output is enhanced to supply the body with oxygenated blood. Other changes include pupil dilation, sweating, and changes in blood vessel tone (vasoconstriction or vasodilation).
Answer for screen readers
During sympathetic activation, the heart rate, force of contraction, and rate of conduction increase. Cardiac output is enhanced to supply the body with oxygenated blood. Other changes include pupil dilation, sweating, and changes in blood vessel tone (vasoconstriction or vasodilation).
More Information
Sympathetic activation prepares the body for 'fight-or-flight' responses during stress, enabling heightened alertness and physical capabilities.
Sources
- Sympathetic Nervous System - Physiopedia - physio-pedia.com
- Sympathetic Nervous System: What to Know - WebMD - webmd.com
- Overview of the Autonomic Nervous System - Merck Manuals - merckmanuals.com
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