Describe neural and chemical (both systemic and local) effects exerted on the blood vessels when you are fleeing from a mugger. (Be careful, this is more involved than it appears at first glance.)

Video transcript

Hey, everyone. Let's take a look at this question together. When experiencing stress and anxiety, the body's sympathetic nervous system is activated, releasing stress hormones like epinephrine and norepinephrine from the adrenal glands. These hormones act on the smooth muscles surrounding the blood vessels and cause what is it? Answer choice. A vasodilation, answer choice. B vasoconstriction. Answer choice C peristalsis or answer choice. D venoconstriction. Let's work this problem out together to try to figure out which of the following answer. Choices is the correct answer. So we can recall that when we're talking about the body's sympathetic nervous system being activated and releasing those stress hormones like ephrine and nor eine ephrine, we are talking about the body's fight or light response. And as a result of this response, the body experiences an increase in the blood flow to those vital organs such as the heart and the brain. And this increase in the blood flow is a result of the narrowing of those blood vessels and the narrowing of the blood vessels is a result of the restriction of the blood vessels, which means that answer choice. B vasoconstriction is the correct answer. Since the narrowing of the blood vessels helped redirect the blood flow to those vital organs such as the heart and the brain and the narrowing of the blood vessels is through vasoconstriction. I hope you found this video to be helpful. Thank you and goodbye.