Question

Activation of the parasympathetic nervous system results in which of the following responses? 1) an increasein heart rate 2) vasoconstriction 3) Bronchoconstriction 4) renin secretion 5) relaxation of the GI tract

Answer 1

Answer:

The activation of parasympathetic nervous system results in the relaxation of the GI tract.  

Explanation:

Parasympathetic nervous system helps the brain to understand that the danger is now over and it can relax. Hormones named corticotropin and adrenocorticotropin which are realising the body to start working against danger is now going to be relaxed with relaxation of parasympathetic nervous system. This is how sympathetic and parasympathetic nervous system works together co-ordinate together in fight or flight mechanism of the nervous system.

The body fight or flight response is under the control of sympathetic nervous system, which is one part of autonomic nervous system. The another part is parasympathetic nervous system that relaxes and slow down the body's response.