CV System - Heart

Question 1

The heart is divided into two. Each part has a

Answer 1

smaller atrium

larger ventricle

Question 2

The heart has its own blood supply via

Answer 2

coronary arteries

Question 3

What brings blood back into the heart

Answer 3

vena cava (RHS)

Question 4

What takes blood away from the heart

Answer 4

Aorta (LHS)

Question 5

The valve on the RHS heart

Answer 5

Tricuspid valve

Question 6

The valve on the LHS heart

Answer 6

Mitral or Bicuspid vlave

Question 7

Atrioventricular (AV) valves

Answer 7

1. Mitral / Bicuspid valve (LHS)

2. Tricuspid valve (RHS)

Question 8

Semilunar Valves

Answer 8

1. Aortic semi-lunar valve (LHS)

2. Pulmonary semi-lunar valve (RHS)

Question 9

Cardiac muscle is also known as

Answer 9

myocardium

Question 10

Muscle cells in the heart are

Answer 10

short and branched

Question 11

Muscle cells are joined at

Answer 11

intercalated discs

the gap junctions allow for AP to spread

Question 12

Cardiac muscle relies on

Answer 12

aerobic production of ATP

Question 13

Nerve supply to the heart

Answer 13

ANS

Both sympathetic and parasympathetic NS

Question 14

Sympathetic NS

Answer 14

speeds up the heart rate

Can alter contractility of cardiac muscle

Question 15

Parasympathetic NS

Answer 15

slows down HR

Question 16

The pacemaker of the heart is

Answer 16

Sino Atrial Node

Question 17

Components of ECG

Answer 17

P - atrial depolarisation
QRS - depolarisation of the ventricles
T - repolarisation of ventricles

Question 18

The cardiac cycle is from P wave to

Answer 18

P wave

Question 19

Atria repolirartion occurs

Answer 19

at the same tie as QRS wave but is hidden