Cardiovascular System- Responses Flashcards
List the 5 responses of the Cardiovascular System
1) Anticipatory rise in heart rate prior to exercise
2) Increased heart rate
3) Increased cardiac output
4) Increased blood pressure
5) Redirection of blood flow
State 4 facts about the anticipatory rise?
It?s the increase in heart rate prior to exercise.
It is caused by the sympathetic nervous system.
The chemical called adrenaline is released into the blood.
The adrenaline is released from the adrenal gland.
State 3 facts about the response of increased heart rate
Heart rate increases to ensure more oxygen reaches the muscles.
Nerves in the brain detect cardiovascular activity.
Once detected heart rate and pumping strength will increase.
Regional blood flow is altered in proportion to intensity.
How do you calculate Cardiac Output? Also, how does exercise affect it?
It?s the product of heart rate X stroke volume.
During exercise, cardiac output will increase.
What is blood pressure?
?The pressure of blood against the walls of your arteries
This pressure results from two forces:
Systolic pressure: The pressure exerted when the heart contracts.
Diastolic pressure: The pressure exerted when the heart relaxes.
What happens to your systolic and Diastolic blood pressure during exercise?
During exercise your systolic blood pressure increases.
Your heart is now working harder to supply more blood, rich in oxygen, to your working muscles.
Diastolic pressure stays the same or slightly decreases.
Describe what the redirection of blood means?
Redirection of blood flow happens due to vasoconstriction and vasodilation. To ensure that blood and oxygen reach the essential areas during exercise, redirection of blood occurs.
