01b. Acute Responses - cardiovascular

Question 1

List 6 acute cardiovascular responses

Answer 1

Increased HR, SV, Q, Blood Pressure. Blood redistribution and decreased blood plasma levels

Question 2

Define Heart Rate

Answer 2

Amount of times the heart beats per minute

Question 3

Define Stroke Volume

Answer 3

The amount of blood pumped out of the left ventricle per beat

Question 4

Define Cardiac Output

Answer 4

The amount of blood pumped out of the left ventricle per minute (HR x SV = Q)

Question 5

Define Blood Pressure

Answer 5

The pressure exerted on the blood vessels

Question 6

Define Redistribution

Answer 6

When blood is moved to a part of the body that requires the oxygen it is carrying the most.
This occurs via vasoconstriction (decreasing blood flow) of the blood vessels to the areas that doesnt need it and vasodilation (increasing blood flow) to the areas that do.

Must have movement of blood and oxygen to areas of need via vasoconstri

Question 7

Describe what happens to blood plasma levels in reponse to exercise

Answer 7

It decreases
as a result of sweat (to cool body down)

This causes an increase in blood viscosity which makes it harder to pump

Question 8

Define AVO2 Difference

Answer 8

The difference between the amount of oxygen in the arteries and the veins.

It indirectly measures how much oxygen the muscles use.

Question 9

What happens to SV as intensity increases from sub max to max and why?

Answer 9

It plateaus as it has reached its maximum already due to its finite capacity.

Question 10

Define venous return

Answer 10

The amount of blood returned to the heart via the veins

Question 11

What is meant by systolic blood pressure and how does it respond to increased intensity?

Answer 11

WHAT = The pressure in the artery walls when the heart is contracting.
It increases in response to exercise

Question 11

What is meant by diastolic blood pressure and how does it respond to increased intensity?

Answer 11

WHAT= The pressure in the artery walls when the heart is relaxing (filling with blood)
It remains the same during exercise

only systolic blood pressure should increase in response to exercise

Question 12

What is the amount of time the heart beats per minute called?

Answer 12

Heart rate (HR)

Write out in full

Question 13

What is the amount of blood pumped out of the left ventricle per beat called?

Answer 13

Stroke volume

Write out in full

Question 14

WHat is the amount of blood pumped out of the left ventricle per minute called?

Answer 14

Cardiac output (Q)

Question 15

What is the difference between the amount of oxygen in the arteries and the veins called?

Answer 15

AVO2 difference

Question 16

What is the pressure exerted on the blood vessels called?

Answer 16

Blood pressure

Question 17

What is it called when blood is moved to a part of the body that requires the oxygen it is carrying the most?

Answer 17

Redistribution

Question 18

What causes a decrease in blood flow to an area?

Answer 18

Vasoconstriction

Question 19

What causes a increase in blood flow to an area?

Answer 19

Vasodilation

Question 20

What is vasoconstriction?

Answer 20

narrowing of blood vessels decreasing blood flow

Question 21

What is vasodilation?

Answer 21

widening of blood vessels increasing blood flow

Question 22

Is A stroke volume or heart rate?

Answer 22

Stroke volume (SV)

Plateaus at sub max

Question 23

Is B stroke volume or heart rate?

Answer 23

Heart rate (HR)

HR increases as exercise intensity increases