Heart anatomy 5

Question 1

function of the atrioventricular valves?

Answer 1

Prevent blood returning to atria during ventricular contraction

Question 2

Function of semilunar valves?

Answer 2

prevent blood returning to ventricles during filling (diastole)

Question 3

Mitochondria makes up how much go the cell?

Answer 3

20%

Question 4

cardiac muscle cells are connected by?

Answer 4

intercalated discs

Question 5

Adhesion belts?

Answer 5

link actin to actin

Question 6

Desmosomes?

Answer 6

link cytokeratin with cytokeratin

Question 7

Gap junction allows?

Answer 7

electro chemical communication

Question 8

AV valves are made out of?

Answer 8

Fibrous connective tissue

Question 9

when the AV valves are open it is called?

Answer 9

Diastole

Question 10

When AV valves are closed?

Answer 10

Systole

Question 11

how are leaflets anchored to papillary muscles?

Answer 11

Chordae tendineae

Question 12

First vessels to branch off the aorta?

Answer 12

Left and right coronary arteries

Question 13

What does the left coronary artery branch in to?

Answer 13

Circumflex artery

anterior inter ventricular artery

Question 14

Cardia veins are responsible for?

Answer 14

drainage of the heart

Question 15

Small cardiac vein runs in the groove between?

Answer 15

The right atrium and ventricle

Question 16

The great cardiac vein drains what aspect of the heart?

Answer 16

the anterior aspect of the heart

Question 17

the great cardiac vein runs in the groove between?

Answer 17

the left atrium and ventricle

Question 18

Where do the cardiac veins drain?

Answer 18

Coronary sinus

Question 19

Cardiac muscles is formed of?

Answer 19

cardiomyocytes

Question 20

Cardiac muscle is?

Answer 20

Short, fat cells with a branching pattern with one or two central oval nuclei

Question 21

Valves on the right have how many cusps?

Answer 21

3

Question 22

Valves on the left have how many cusps?

Answer 22

2

Question 23

What is the purpose of the conduction system?

Answer 23

to greatly increase the efficiency of heart pumping

Question 24

The conduction system coordinates?

Answer 24

Heart contraction and atrioventricular valve action

Question 25

Purkinje cells make up what percentage of myocardial cells?

Answer 25

1%

Question 26

pale, purkinje cells contain a lot of what kind of junction?

Answer 26

gap junction for better spread of excitability