Intro to Electrophysiology and Cardiac Mechanics

Question 1

Na+ channels open ____, K+ channels open ______

Answer 1

first, next

Question 2

Action potential order

Answer 2

Depolarization, action potential, hyperpolarization, resting potential

Question 3

Na+ is responsible for

Answer 3

the spike in voltage

Question 4

K+ is responsible for

Answer 4

the hyperpolarization

Question 5

During resting potential, Na+ channels are

Answer 5

closed

Question 6

During depolarization, Na+ channels are

Answer 6

closed and inactivated

Question 7

During action potential, Na+ channels are

Answer 7

open

Question 8

During hyperpolarization, Na+ channels are

Answer 8

closed

Question 9

Synapse

Answer 9

chemical connection from one cell to another

Question 10

RA

Answer 10

right atria – systemic – blood from the body

Question 11

LA

Answer 11

left atria – pulmonary – blood from the lungs

Question 12

RV

Answer 12

right ventricle – pumps to the lungs (pulmonary artery)

Question 13

LV

Answer 13

left ventricle – pumps to the body (aorta)

Question 14

Heartbeat originates in the

Answer 14

sinoatrial (SA) node

Question 15

Wave of depolarization spreads to the

Answer 15

atria and reaches the atroventricular (AV) node

Question 16

Depolarization passes to the ventricles via the

Answer 16

Bundle of His

Question 17

Depolarization is then conducted rapidly over the surface of the ventricles by

Answer 17

Purkinje fibers

Question 18

Every single skeletal muscle fiber is innervated by a

Answer 18

motor neuron

Question 19

Cardiac myocytes

Answer 19

don’t need innervation to fire

Question 20

Skeletal muscles

Answer 20

Na+ and K+ channels

Question 21

Cardiac muscles

Answer 21

Na+ K+ and Ca++ channels

Question 22

Atrial depolarization

Answer 22

P wave

Question 23

Ventricular depolarization

Answer 23

QRS wave

Question 24

Ventricular repolarization

Answer 24

T wave

Question 25

Depolarization causes

Answer 25

heart contraction

Question 26

Repolarization causes

Answer 26

heart relaxation

Question 27

E

Answer 27

End

Question 28

D

Answer 28

Diastolic (rest/filling)

Question 29

S

Answer 29

Systolic (contraction/ejection)

Question 30

P

Answer 30

pressure

Question 31

V

Answer 31

volume

Question 32

L

Answer 32

left

Question 33

R

Answer 33

right

Question 34

EDP

Answer 34

end diastolic pressure

Question 35

EDV

Answer 35

end diastolic volume

Question 36

ESP

Answer 36

end systolic pressure

Question 37

ESV

Answer 37

end systolic volume

Question 38

LVP

Answer 38

left venous pressure

Question 39

LVV

Answer 39

left venous volume

Question 40

Preload

Answer 40

EDP, EDV, RAP

Question 41

Afterload

Answer 41

ESP, ESV, MAP

Question 42

SV

Answer 42

EDV - ESV

Question 43

CO

Answer 43

HR*SV

Question 44

Left Ventricular Pressure graph

Answer 44

A-V valve shuts, aortic valve opens, aortic valve shuts, A-V valve opens

Question 45

Isovolumic

Answer 45

No change in blood volume in the ventricles

Question 46

Stroke volume

Answer 46

amount of blood pumped during one heartbeat