Chapter 19 Deck 2 Slides 27+

Question 1

atrioventricular valves prevent backflow into?

Answer 1

Atria

Question 2

each of the semilunar valves has how many cups?

Answer 2

three

Question 3

semi-lunar valves close when ________ pressure becomes greater than _______ pressure

Answer 3

arterial pressure becomes greater then ventricular pressure.

Question 4

cardiac muscle cells are connected with__________ ____.

Answer 4

intercalated discs

Question 5

what mechanically joins cardiac muscle cells with protein filaments?

Answer 5

desmosomes

Question 6

what electric Lee Joins cardiac muscle cells to make each heart chamber a functional unit?

Answer 6

Gap Junctions

Question 7

because cardiac muscle has a high demand for energy it has an extensive blood supply numerous __________, _______, and creatine ________.

Answer 7

numerous mitochondria myoglobin and creatine kinase

Question 8

cardiac muscle tissue is able to use what types of fuel molecules?

Answer 8

fatty acids, glucose, like the gas it, amino acids, and Ketone bodies

Question 9

cardiac muscle relies mostly on what type of metabolism?

Answer 9

aerobic metabolism which makes it susceptible to failure when oxygen is low

Question 10

interference with blood flow to the heart muscle can cause _____ _______?

Answer 10

cell death

Question 11

the fibrous skeleton of the heart is made of what type of tissue?

Answer 11

dense irregular connective tissue

Question 12

this structure provides structural support at the boundary of Atria and ventricles

Answer 12

fibrous skeleton of heart

Question 13

provides framework for attachment of cardiac muscle and acts as electrical insulator preventing ventricles from Contracting at the same time as Atria

Answer 13

fibrous skeleton of heart

Question 14

________ _________ delivers blood to hearts walls

Answer 14

coronary circulation

Question 15

coronary _________ transport oxygenated blood to heart wall

Answer 15

arteries

Question 16

coronary ______ transport deoxygenated blood toward right atrium

Answer 16

veins

Question 17

right and left co onary arteries sit in _______ _______, they are the first and only branches off of the ________ ______

Answer 17

coronary sulcus, ascending aorta

Question 18

the left coronary artery branches into the ____________ __________ __________ and the __________ artery

Answer 18

anterior interventricular artery and the circumflex artery

Question 19

the right coronary artery branches into?

Answer 19

the posterior interventricular artery and the right marginal artery

Question 20

what coronary vessel supplies right heart border?

Answer 20

right marginal artery

Question 21

what coronary vessel supplies posterior left and right ventricle?

Answer 21

posterior interventricular artery

Question 22

what coronary vessel supplies left atrium and ventricle

Answer 22

circumflex artery

Question 23

what coronary vessel is nicknamed the Widowmaker and supplies most of the interventricular septum and supplies anterior surface of both ventricles?

Answer 23

anterior interventricular artery

Question 24

what vein sits next to the right marginal artery?

Answer 24

the small cardiac vein

Question 25

what veins sits in anterior interventricular sulcus?

Answer 25

great cardiac vein

Question 26

what veins hits in posterior interventricular sulcus

Answer 26

middle cardiac vein

Question 27

what sits in the prosti rear aspect of the coronary sulcus which receives blood from cardiac veins and drains into the right atrium?

Answer 27

coronary sinus

Question 28

sudden and complete occlusion of coronary artery, myocardium deprived of oxygen, possible tissue death, excruciating chest pain radiating down left arm

Answer 28

myocardial infraction heart attack

Question 29

a myocardial infraction is a?

Answer 29

heart attack, sudden and complete occlusion of coronary artery

Question 30

pain usually on left side of chest, left arm or jaw period usually referred pain when performing strenuous activity period treatments include induction of vascular dilation

Answer 30

angina pectoris

Question 31

atherosclerosis and coronary spasms can lead to?

Answer 31

angina pectoris and/or myocardial infraction

Question 32

plaques narrow coronary arteries

Answer 32

atherosclerosis

Question 33

sudden narrowing of vessels

Answer 33

coronary spasm

Question 34

activity of the conduction system is influenced by the?

Answer 34

autonomic nervous system

Question 35

where is the sinoatrial node located

Answer 35

located high in posterior wall of right atrium

Question 36

where is the atrioventricular node located?

Answer 36

located in floor of right atrium

Question 37

what extends from The Av node through the interventricular septum and eventually divides into left and right bundles?

Answer 37

atrioventricular bundle

Question 38

eventually left and right bundles become?

Answer 38

purkinje fibers

Question 39

extend from left and right bundles at Hart’s Apex, course through walls of ventricles.

Answer 39

purkinje fibers

Question 40

the cardiac center which is the nervous systems construct control center for the heart is located in the?

Answer 40

medulla oblongata

Question 41

contains cardioacceleratory and cardio inhibitory centers

Answer 41

cardiac center of medulla oblongata

Question 42

the cardiac center receive signals from?

Answer 42

baroreceptors and chemoreceptors in the cardiovascular system

Question 43

what Pathways does the cardiac center use to send signals?

Answer 43

sympathetic and parasympathetic

Question 44

influences rate and force of heart contractions through modification not initiation?

Answer 44

autonomic nervous system, cardiac center of medulla oblongata

Question 45

parasympathetic innervation decreases the heart rate starting at the cardio inhibitory Center. the right vagus nerve innervates? Left vagus nerve?

Answer 45

write Vegas innervates SA node period left Vegas innervates AV node.

Question 46

__________ innervation increases heart rate and force of contraction starting at the cardio acceleratory center (41)

Answer 46

sympathetic

Question 47

what kind of innervation can dilate coronary vessels?

Answer 47

sympathetic innervation