As the aroma of freshly brewed coffee drifted by dozing Henry's nose, his mouth started to water and his stomach began to rumble. Explain his reactions in terms of ANS activity.

Video transcript

Hi, everyone. Welcome back. Let's look at our next question. Sally walked into a bakery and was instantly captivated by the delightful scent of freshly baked bread. As a result, she noticed an increase in salivation and felt hunger pangs. These reactions can be explained in terms of a sympathetic nervous system activity. B parasympathetic nervous system activity, C somatic nervous system activity or d none of these. So we're talking about the reactions of increased salivation and hunger pains. These are involuntary responses. You don't, you don't control them happening involuntary and that means we can go ahead and eliminate choice c somatic nervous system activity because that deals with voluntary muscle movements. So if it asked us what was explained, what, how you would explain her walking into the bakery to buy some bread. Um that would be the somatic nervous system, but these involuntary reactions would not be covered by the somatic nervous system. So choice C is crossed off. So we're left with the sympathetic or the parasympathetic nervous system activity and this kind of little nickname to help you remember the distinction between them, the sympathetic nervous system would be described as fight or flight you probably heard that term and the parasympathetic nervous system as rest and digest putting those in quotation marks. So given those nicknames, which system would be responsible for these involuntary actions. That would be choice. B the parasympathetic nervous system activity because the body is preparing to eat and digest food by salivating and having these hunger pains. So it's definitely the parasympathetic nervous system kicking into action. It's not the sympathetic nervous system. We can eliminate choice A because that would be the body preparing in a stressful or threatening situation to be prepared, obviously to fight or run away. And obviously our delicious bakery is not a stressful or threatening situation. So we've eliminated choice A and then of course, choice D none of these, we have our correct answer here. The reactions can be explained by choice. B, parasympathetic nervous system activity. See you in the next video.