Heart Activity

Question 1

Cardiac muscles are made up of muscle cells called?

Answer 1

Cardiomyocytes

• Y shaped
• Requires a lot of energy for the heart muscle to contract

Question 2

Which system allows for the heart muscle to contract to ensure it pumps blood around the body efficiently?

Answer 2

Cardiac conduction system

Question 3

The cardiac condition system is made up of?

Answer 3

SA Node
AV Node
The bundle of His
Left and right bundle branches 
The purkinje fibres

Question 4

Cardiac cycle is the event of?

Answer 4

One beat per minute

Question 5

When the heart contracts it is called?

Answer 5

Systole

Question 6

When the heart relax‘s, it is called?

Answer 6

Diastole ( dead / relaxed )

Question 7

Atrial systole is the contraction of what heart muscles?

Answer 7

Left and right atria

Question 8

What is an ECG?

Answer 8

Way of measuring electrical activity to heart

Question 9

What is a sinus rhythm?

Answer 9

Normal rhythm of the heart

Question 10

The group of cardiac muscle cells that delay actions between the atria and AV bundle is called the?

Answer 10

AV Node

Question 11

Action potentials pass rapidly from on cardiac muscle cell to another because of?

Answer 11

Intercalated discs

Question 12

At the end of the …….., the ventricles are 70% filled

Answer 12

Passive ventricular filling