Lab

Question 1

Muscle contraction

Answer 1

Shortening of muscle fiber length

Question 2

What kind of muscle contraction does a heart do?

Answer 2

The heart result in a ringing motion

Question 3

Electrical conduction

Answer 3

The movement of ions between cells, resulting in action, potentials moving from cell to cell

Question 4

Depolarization

Answer 4

The change in self charge from negative to positive triggering internal cellular change, positive enters to cell

Question 5

Repolarization

Answer 5

The return to negative charge of a cell membrane, positive irons leaving the cell

Question 6

Extrinsic

Answer 6

Coming from outside

Question 7

Intrinsic

Answer 7

Coming from within

Question 8

Automaticity

Answer 8

The ability to perform an action in voluntary or unconsciously

Question 9

What are some characteristics of a cardiac cell?

Answer 9

Striated, branching, uninucleate and involuntary

Question 10

Conduction

Answer 10

Specialized cardiac cell located within the conduction system of the heart

Question 11

Contractile

Answer 11

Traditional, cardiac muscle cell created mechanically forces used to expel blood

Question 12

Heart rate

Answer 12

Number of cardiac cycles per minute, typically 60 to 100 is OK but 70 is average

Question 13

Extrinsic

Answer 13

Autonomic, nervous system, sympathetic, nervous system increases heart rate, contractility, and inhalation while, PNS decrease his heart rate and track agility

Question 14

How many beats per minute is the SA nodes responsible for

Answer 14

100-110

Question 15

How many beats per minute is the AV node responsible for?

Answer 15

40-60

Question 16

How many beats per minute is a Perkinje fiber responsible for

Answer 16

20-40

Question 17

What does a SA node do?

Answer 17

It is the pacemaker cell and spread signals to both atria, causing contraction of the atria, forcing the last bit of blood into the ventricles

Question 18

What does the AV node do?

Answer 18

.1 second pause allowing for complete explosion of blood from atria to ventricle

Question 19

What does bundle of his do?

Answer 19

Only site were conduction signals can travel from atria to ventricle

Question 20

What does bundle branches do?

Answer 20

Conduction of signals through IV septum left and right against split to each ventricle

Question 21

What does a EKG do?

Answer 21

A graph representation of the electrical activity of the heart

Question 22

Function of P wave

Answer 22

Atrial depolarization

Question 23

Function of QRS complex

Answer 23

Ventricle depolarization ( atrial depolarization )

Question 24

T wave

Answer 24

Ventricle depolarization

Question 25

Systole

Answer 25

Deportation typically ventricles of cells includes contraction and typically expulsion of blood, R-T interval 1/3 at rest

Question 26

Diastole

Answer 26

Repolarization, typically ventricles, of cells, inclusively, relaxation, and filling of blood

Question 27

What’s the formula for pulse pressure

Answer 27

SBP - DBP = PP

Question 28

What’s the formula for Mean Arterial Pressure ( MAP )

Answer 28

MAP = DBP + 1/3(PP) or MAL = CO X TPR

Question 29

Laminar Flow

Answer 29

Smooth flow found regularly and makes no sound

Question 30

Turbulent flow

Answer 30

The erratic flow caused by decreasing the diameter of the artery. This makes a sound heard with distal to the occlusion.