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Which set of changes reflects activation of the sympathetic nervous system?
APupils constrict and the liver stores glucose away
BPupils dilate and the liver releases glucose to blood
CHeart rate falls and bladder control is fully regained
DBlood pressure drops and digestion begins in earnest
Answer & Solution
Correct answer: B. Pupils dilate and the liver releases glucose to blood
1. The sympathetic division prepares the body for stress-related activities, the fight or flight response.
2. In the chapter's account the pupils dilate, heart rate and blood pressure increase, the bladder relaxes, the liver releases glucose and adrenaline surges into the bloodstream.
3. The parasympathetic division then returns the body to routine operation.
4. Options A, C and D each describe that parasympathetic reversal, in which pupils constrict, the liver stores glucose as glycogen and heart rate and blood pressure return to normal.
_Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 3 "Biopsychology", §3.3 Parts of the Nervous System_
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