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Chapter 2: Problem 7

While walking through the woods one day, Ricardo sees a large bear. His sympathetic nervous system will most likely a. cause his heart to beat faster as he prepares to run away b. allow him to notice how smooth his can of bear spray feels against his hand c. cause a reflexive reaction in his spinal cord that lets him run away d. allow his breathing to slow as he relaxes and thinks about what to do next

Short Answer

Expert verified
a. cause his heart to beat faster as he prepares to run away

Step by step solution

01

Choice A: Cause his heart to beat faster as he prepares to run away

The sympathetic nervous system does increase the heart rate in stressful situations as part of the "fight or flight" response. This option aligns with the known response of the sympathetic nervous system.
02

Choice B: Allow him to notice how smooth his can of bear spray feels against his hand

The sympathetic nervous system does not have a direct influence on the sense of touch. This option does not align with the known response of the sympathetic nervous system.
03

Choice C: Cause a reflexive reaction in his spinal cord that lets him run away

The spinal cord reflexes are indeed involved in the "fight or flight" response. However, this option incorrectly attributes this response to the spinal cord rather than to the sympathetic nervous system.
04

Choice D: Allow his breathing to slow as he relaxes and thinks about what to do next

The sympathetic nervous system does not cause relaxation or slowed breathing. The parasympathetic nervous system is responsible for the "rest and digest" response, which involves slowing breathing and calming the body. This option does not align with the known response of the sympathetic nervous system. Based on the analysis of each choice, the correct response is:
05

Answer

a. cause his heart to beat faster as he prepares to run away

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