Question

How does the human cardiovascular system respond when an individual faces a fight-or-flight situation? (1 point)

a)Blood pressure and heart rate decrease, and blood supply to large muscle groups increases.

b)Blood pressure and heart rate increase, and blood supply to large muscle groups is increased.

c)It slows down and diverts blood flow to the brain, providing more energy for problem solving.

d)It speeds up and diverts blood flow to the digestive system, providing additional energy.

Answer 1

FIGHT-OR-FLIGHT RESPONSE

                                   Also called as hyperarousal or the acute stressresponse , is a physiological reaction that ocuurs in response to a perceived harmful event , attack, or threat to survival.It was first discovered by Walter Bradford Cannon. The response is charactherised by increased heart rate (tachycardia), anxiety , increased respiration , and increased blood glucose concentrations (due to gluconeogenesis )

                                   The sympathetic nervous systems stimulate the adrenal glands triggering the release of catecholamines , which include adrenaline and noreadrenaline . This results in an increase in heart rate, increased blood pressure and increased breathing rate.

             So the correct answer is

                      b)Blood pressure and heart rate increase, and blood supply to large muscle groups is increased.