Question

Tavi was running at a fast pace in a marathon. Which of the following describes how the Tavi's nervous system worked with his circulatory system to help him to maintain homeostasis?
A) the brain sends signals to the veins to decrease the blood pressure to the legs so that muscles have less mass
B) the brain send signals to the blood vessels in the legs to dilate so that there is increased blood flow
C) the heart send signals to the brain which then releases a hormone that causes the blood flow to decrease to the stomach
D) the brain informed the heart to decrease its rate of pumping in order to slow the flow of blood during exercise

Answer 1

The correct answer is B) The brain send signals to the blood vessels in the legs to dilate so that there is increased blood flow.

During running Tavi's muscles need oxygen to break down fats and carbohydrates for energy. As we know that blood work as carrier for oxygen so to make room for fresh oxygen, the brain send signals to the blood vessels to dilate to increase the flow of blood in legs. The process of dilation of vessels in our body is called vasodilation.