When muscarinic receptors are stimulated, what happens physiologically in the body? (Select all that apply.)
A) Pupil constriction
B) Pupil dilation
C) Increased secretions
D) Increased bladder contraction
E) Increased heart rate
A, C, D
Feedback:
Stimulation of muscarinic receptors causes pupil constriction, increased gastrointestinal (GI) motility and secretions (including saliva), increased urinary bladder contraction, and a slowing of the heart rate. Pupils are constricted, not dilated and heart rate slows, it does not increase.
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