Wk 6 - LE 12: Cardiovascular (CO control)

Question 1

The left and right ventricles pump ______

Answer 1

together

Question 2

CO = ______ x _____

Answer 2

CO = SV x HR

Question 3

The vagal nerves are part of the _______ nervous system

Answer 3

parasympathetic

Question 4

The left vagal nerve innervates the _______ node in the heart

Answer 4

atrioventricular

Question 5

The right vagus nerve innervates the _______ node in the heart

Answer 5

Sinoatrial (primary)

Question 6

If the firing rate of the left and right cardiac vagus nerves increase, what effect will it have on heart rate?

Answer 6

Heart rate decreases

Question 7

If the firing rate of the left and right cardiac vagus nerves decrease, what effect will it have on heart rate?

Answer 7

Heart rate increases

Question 8

Can sympathetic AND parasympathetic controls affect the heart rate?

Answer 8

Yes

Question 9

At low heart rates (<100 bpm), heart rate is varied by altering ____ activity

Answer 9

vagal (parasympathetic)

Question 10

Heart rate beyond 100 bpm is varied by altering ____ activity

Answer 10

sympathetic

Question 11

Preload is also known as the ____ _____

Answer 11

filling pressure

Question 12

What are the two positive influences of stroke volume?

Answer 12

Preload and contractility

Question 13

What is the negative influence of stroke volume?

Answer 13

Afterload

Question 14

The size and mass of the heart is bigger in an ______

Answer 14

athlete

Question 15

Do the walls of the hearts increase in athletes?

Answer 15

No, but you will find a bigger heart.

Question 16

Aerobic training effects resting values of ____ and ____, but not _____

Answer 16

HR and SV, but not CO