Heart

Question 1

When the action potential becomes positive

Answer 1

Depolarization

Question 2

Period of slow repolarization called

Answer 2

Plateau phase

Question 3

When the action potential becomes normal

Answer 3

Repolarization

Question 4

lasts about as long as the plateau phase of the action potential in cardiac muscle

Answer 4

Refractory period

Question 5

The conduction system of the heart includes:

Answer 5

SA nodes, AV nodes, AV bundles, Bundle branches and Purkinje fibers

Question 6

Function as the heart’s pacemaker

Answer 6

Sinoatrial node

Question 7

Located in the lower portion of the atrium

Answer 7

Atrioventricular node

Question 8

Pass to the apex of the heart and extend to the heart muscles

Answer 8

Purkinje fibers

Question 9

If the SA node unable to function, another area such as the AV node, becomes the pacemaker. The resulting heart rate is much slower than normal and the result is called

Answer 9

Ectopic beat

Question 10

Reduces the output of the heart to only a few millimeters of BPM when it occurs in the ventricle

Answer 10

Fibrillation

Question 11

They apply a strong electrical shock to the chest region

Answer 11

Defibrillation

Question 12

The record of these electrical event is an

Answer 12

Electrocardiogram

Question 13

ECG consist of 3 waves which are?

Answer 13

P,QRS and T wave`

Question 14

Depolarization of the atrial myocardium

Answer 14

P wave

Question 15

from depolarization of ventricles

Answer 15

QRS wave

Question 16

Represents the repolarization of the ventricles

Answer 16

T wave

Question 17

The atria contracts and begin to relax

Answer 17

PQ interval

Question 18

Represents the length of time required for ventricular depolarization and repolarization

Answer 18

QT interval

Question 19

Repetitive pumping process that begins with the onset of cardiac muscle

Answer 19

Cardiac cycle

Question 20

Contraction of two atria

Answer 20

Atrial systole

Question 21

Contraction of two ventricle

Answer 21

Ventricular systole

Question 22

Relaxation of two atria

Answer 22

Atrial diastole

Question 23

Relaxation of two ventricle

Answer 23

Ventricular diastole

Question 24

The first heart sound can be represented by the syllable

Answer 24

Lubb

Question 25

second heart sound can be represented by the syllable

Answer 25

Dubb

Question 26

If heart valve does not close completely it is called as?

Answer 26

Incompetent valve

Question 27

Results of faulty valves

Answer 27

murmurs

Question 28

The volume of blood pumped by either ventricle of the heart each minute

Answer 28

Cardiac output

Question 29

Volume of blood pumped per ventricle each time heart contracts

Answer 29

Stroke volume

Question 30

Results from the heart's normal functional characteristics and does not depend on either neural or hormonal regulation

Answer 30

Intrinsic regulation

Question 31

Involves both neural and hormonal control

Answer 31

Extrinsic regulation

Question 32

The degree to which the ventricular walls are stretched at the end of the diastole

Answer 32

Preload

Question 33

Relationship between preload and stroke volume is called

Answer 33

Starling's law of the heart

Question 34

Refers to the pressure against which the ventricles must pump blood

Answer 34

Afterload

Question 35

Is a mechanism of the nervous system that plays an important role in regulating heart function

Answer 35

Baroreceptor reflex

Question 36

Stretched receptors that monitor blood pressure in the aorta in the wall of the internal carotid arteries which carry blood to the brain

Answer 36

Baroreceptors

Question 37

Medula oblongata is _

Answer 37

cardioregulatory center