Coronory Arteries And Internal Heart

Question 1

Where do the L R coronary arteries arise from

Answer 1

Ascending aorta

Question 2

Cardiac veins return Venus bood to the coronary _____ in R atrium

Answer 2

Sinus

Question 3

Which nodes in the heart do branches R coronary artery supply

Answer 3

Sinoatrial
Atrioventricular

Question 4

Which branch of the R coronary artery supplies the inferior border is the heart

Answer 4

Right marginal

Question 5

What is the name of the continuation of the coronary after on the inferior/diaphragmatic surface of heart

Answer 5

Posteriori inter-ventricular artery

Question 6

Left coronary artery branches to 2 terminal branches, what are they

Answer 6

Anterior interventricular (LAD)
Circumflex

Question 7

Which artery does the L marginal artery that supplies the L ventricle arise from

Answer 7

Circumflex

Question 8

What arteries can posterior interventricular arise from

Answer 8

L or R coronary

Question 9

Origin of posterior interventricular can be
A left dominant
B Right sim
C either

Answer 9

C

Question 10

Why is it important clinically if someone has Right dominant circulation

Answer 10

Occlusion of the L main stem would impair blood flow to part of it but not entire L ventricle

Question 11

Why is it important clinically if someone has Left dominant circulation

Answer 11

If an occlusions occurred on left main stem, entire left ventricle could be blocked off

Question 12

What do the valves in the heart ensure

Answer 12

Unidirectional flow

Question 13

Main internal features of R atrium

Answer 13

Interatrial septum
Fossa ovalis
Crista terminalis

Question 14

What is the fossa ovalis in R atrium

Answer 14

Depression in the septum from foetal foramen ovals

Question 15

What is the crista terminalis in R atrium

Answer 15

-Muscular ridge separating smooth walled posterior let of atrium from anterior parts which are ridged (pectinate muscles)

Question 16

List main structure in Right ventricle

Answer 16

Interventricular septum
Trabeculae cernaea
Papillary muscles
Chordae tendineae
Moderator band

Question 17

In the R ventricle what is the trabeculae carnae

Answer 17

Muscular riddles in internal wall

Question 18

Describe the chordae tendinea in R ventricle

Answer 18

Fibrous Corte connecting tips of papillary muscles to tricuspid valve

Question 19

Describe the moderator band in the R ventricle

Answer 19

Modified region of trabeculaea caress which connects suptum to 1 of the papillary muscles

Question 20

Left atrium receives —— blood from lungs via pulmonic veins

Answer 20

Deox

Question 21

List the main structures of the left ventricle

Answer 21

Trabeculae carneae
Papillary muscles (2)
Chordae tendineae

Question 22

In left ventricle what does the Chordae tendineae do

Answer 22

Connect my papillary muscles to mitral valve’s

Question 23

When ventricles contact this is called ventricular______

A) Diastole
B) systole

Answer 23

B

Question 24

Which valves are the semi lunar

Answer 24

Aortic and pulmanory

Question 25

What is the asculatory region of the aortic valve

Answer 25

2nd intercostal space R of the sternum

Question 26

What is the ascultatory region for pulmanory valve

Answer 26

2nd intercostal space L of the sternum.

Question 27

What is the auscultatory region of tricuspid

Answer 27

5th intercostal space L of sternum

Question 28

What is the auscultatory area for mitral

Answer 28

5th intercostal L mid clavicular line

Question 29

The SA node is the____ of the heart

Answer 29

Pacemaker

Question 30

What structures does the cardinal conduction system include

Answer 30

SA node AV node AV bundle Purkinje fibres

Question 31

Describe the conducting system of heart

Answer 31

-Action potential created by SAN -Wave of excitation spreads across atria causing contraction -impulses are conducted to AVN to the AVB -AVB is split into 2 bundle branches giving rise to purkinje fibres in ventricles cause ventricles to contract

Question 32

A SA node supplied by R coronary artery is in approx __% of people

Answer 32

60

Question 33

A SA node supplied by L coronary artery is present in __% people

Answer 33

40

Question 34

In most people the ______ coronary arteries supplied AVB

Answer 34

Left

Question 35

In most people the AV node is supplied by _______ interventricular artery

Answer 35

Posterior

Question 36

_____ stimulation increase the hearts rate and force of contraction A) parasympathetic B)sympathetic

Answer 36

B

Question 37

_____ stimulation decreases the hearts rate and force of contraction A) sympathetic B) parasympathetic

Answer 37

B