From an evolutionary perspective, what is the most likely reason why stimulation of the sympathetic nervous system represses erections in males?
a. A diminished erection may have been a prehistoric signal for females to flee and seek shelter.
b. An erection may attract unwanted completion or threats from intruders.
c. It would better serve the organism as a whole if the physiological resources required to maintain an erection were allocated to other body parts.
d. If a male encounters an aggressor, an erect penis is an easy target for the aggressor to attack.
Question 2
Andrew is hiking through the woods on his way to a secluded campsite where he will meet up with several friends. Andrew is feeling relaxed and happy as he thinks about his camping trip, until he spots a mountain lion close to the trail where he is hiking.
Which physiological system is likely to kick into full gear when Andrew encounters the mountain lion?
a. central nervous system c. parasympathetic nervous system
b. automatic nervous system d. sympathetic nervous system
Pre–Main-Sequence Evolutionary Tracks
Deep Brain Stimulation
Effects of Sympathetic and Parasympathetic Divisions of the ANS
Sympathetic Nervous System's Flight or Fight Response
Evolutionary tree for the living amniote groups
The evolutionary history of the mitochondrion and the chloroplast