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The Cardiovascular System's response to exercise

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tom palmer

on 9 January 2015

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Transcript of The Cardiovascular System's response to exercise

Anticipatory heart-rate response
Activity response
P2/M1 - Describe/Explain the cardiovascular systems responses to acute exercise
Vasoconstriction
Vasodilation
Increased blood pressure
Before the start of exercise your heart rate usually increases above resting levels. This is known as anticipatory heart-rate response. This is because the nerves that directly supply the heart and chemicals in the blood can rapidly alter the heart rate.
Vessels can also shut down blood flow to tissues, which can temporarily lessen their blood supply. This involves a decrease in the diameter of the blood vessel, resulting in reduced blood flow to the muscles. This process is called vasoconstriction.
At the start of exercise, or even slightly before, nerve centres in your brain detect cardiovascular activity. This results in adjustments that increase the rate and pumping strength of your heart. At the same time regional blood flow is altered in proportion to the intensity of the activity undertaken.
Acute responses - Immediate responses to exercise, such as an increase in body temperature and heart rate
During exercise the vascular portion of active muscles increases through the dilation of arterioles, involving an increase in the diameter of the blood vessels and resulting in an increased blood flow to the muscles. This process is known as Vasodilation.
During exercise aerobic exercise, oxygen consumption and heart rate increase in relation to the intensity of the activity.
Systolic blood pressure
rises progressively, while
diastolic blood pressure
stays the same or decreases slightly. Pulse rates rises and blood flow to your muscles increases
The Cardiovascular System's response to exercise
Acute effects


Lesson Objectives

Know and be able to Describe/Explain:

Anticipatory response
Activity response
Blood pressure
Vasodilation
Vasoconstriction
Systolic blood pressure
- the highest pressure within the bloodstream, which occurs during each beat when the heart is in systole (contracting)
Diastolic blood pressure
- the lowest pressure within the bloodstream, which occurs between beats when the heart is in diastole (relaxing, filling with blood)
Vasoldilation
- when blood vessels widen in an attempt to increase blood flow
Vasoconstriction
- when blood vessels narrow and reduce blood flow
Full transcript