Ben was enjoying a walk in the woods on a beautiful Saturday afternoon. As he went around a curve, he noticed a bear walking toward him. Immediately his pupils dilated, he began to perspire, and his heart accelerated. These changes are most closely related to the function of the:
A angulargyrus
B hippocampus
C parasympathetic nervous system
D sympathetic nervous system
E ventricularsystem

Among other functions, this system is responsible for releasing noradrenaline in the presence of a stimulus, which in prolonged periods lead to the release of adrenaline. In combination, these chemicals provoke a "flight or fly" response.

Some of the effects on the body are pupil dilatation, and increased heart rate, blood pressure and sweating.

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Parrain Parrain · Answer 2 · 2021-10-01T16:13:04+02:00

The changes described are associated with the D. sympathetic nervous system

The sympathetic nervous system is a part of the Autonomic nervous system which means that it works unconsciously. The sympathetic nervous system works to help a person escape danger or avoid stressful situation.

It works by boosting the distribution of hormones such as adrenaline around the body which then cause certain reactions such as:

the heart beating faster to provide more blood to organs
sweating
dilated pupils
raising blood pressure

In conclusion, the symptoms described above are synonymous with those that are produced by the sympathetic nervous system so it must be the system at work.

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