Cardiovascular System Lesson 6

Question 1

What happens to are heart when we get fitter ?

Answer 1

Cardiac hypertrophy / are heart gets bigger.

Question 2

3 points to describe what cardiac hypertrophy is

Answer 2

Our heart gets bigger
Our heart can hold more blood
Our heart can pump out more blood

Question 3

Cardiac hypertrophy produces 3 changes

Answer 3

Increase in stroke volume
Bardycardia ( decrease resting heart rate)
Increase in exercising cardiac output

Question 4

Increase stroke volume

Answer 4

Heart is bigger and stronger

Bigger heart can hold more blood

A stronger heart can pump more blood out with each beat and so stroke volume increases

Question 5

Bradycardia

Answer 5

Stole volume increases meaning the heart is pumping out more blood with each beat

More blood each beat means it can beat less often

This means heart rate is reduced to less than 60bpm

Question 6

Increase in cardiac output

Answer 6

Sv has increased / resting heart rate has decreased.

At rest cardiac output remains the same.

During exercise sv increases and heart rate needs to increase.

Question 7

Capillarisation of muscles and alveoli

Answer 7

Increase number of capillaries around the muscles and alveoli.

This means the extra blood during the exercise can travel to the muscles.

Question 8

Increase in blood volume

Answer 8

This means we produce more red blood cells and hemoglobin

Question 9

Decrease in recovery time

Answer 9

Heart rate recovery time decreases because of increase in stoke volume caopilarisation and blood volume.

After training we can recover much faster than an untrained person

Question 10

Decrease in resting blood pressure

Answer 10

Blood pressure : decrease pressure of blood on arteries walls.

Training means we have a lower resting blood pressure. Reduces pressure the blood applies in the walls of the arteries.