The Heart

Question 1

Systole
Diastole

Answer 1

Systole: ventricular contraction
Diastole: ventricular relaxation

Question 2

what causes heart sounds

Answer 2

blood hitting the heart wall

Question 3

the heart has 4 phases in the beat

Answer 3

aortic valves are open when:
ventrical pressure is high

Atrioventricular valves are open when atrial pressure is higher than ventricular pressure

Question 4

EKG

Answer 4

electrocardiogram

Question 5

P-wave

Answer 5

Atrial depolarization

Question 6

QRS complex

Answer 6

Ventricular depolarization

Question 7

T-Wave

Answer 7

Ventricular repolarization

Question 8

quiz: Fast twitch muscle properties

Answer 8

Large fibers, high force exertion, high glycogeric energy, low mitochondrial content,

Question 10

P-Wave, P-Q segment, QRS Complex, S-T segment, T-Wave

Question 11

what’s in the blood when you have a heart attack

Answer 11

cardiac troponin

Question 12

The flatter the EKG line the more ectopotic sites you have

Answer 12

yes

Question 13

End Diastolic Volume
End Systolic Volume

Answer 13

End Diastolic Volume: volume of blood in ventricle after filling is complete

End Systolic Volume: volume of blood left in ventricle after contraction

Question 14

Stroke Volume
Cardiac Output (CO or Q)

Answer 14

Stroke Volume: volume of blood ejected from ventricle with each beat.

Cardiac Output (CO or Q): Heart Rate X Stroke Volume

Question 15

Stroke volume

Answer 15

EDV - ESV

Question 16

how much blood is in your body

Answer 16

5 liters

Question 17

72 beats/min * stroke volume 70 = cardiac output

Answer 17

5040 ml/min

Question 18

you lose blood slower when you exercise

Answer 18

false, way faster

Question 19

if you lose 1.2 liters of blood

Answer 19

you die

Question 20

Frank-Starling Law of the Heart

Answer 20

When the rate at which the blood flows into the heart from the veins (venous return) changes, the stretch on the ventricular myocardium changes, causing the ventricle to contract with greater or lesser force so that the stroke volume matches the venous return.”

easier : more I stretch sarcomeres, the more sarcomeres can relax back. more blood can flow

Question 21

How does adrenaline increase muscle capacity

Answer 21

releases calcium into muscle cells usually only available through sarcoplastic reticulum

Question 22

during exercise cardiac output increases 5x

Answer 22

but skeletal muscle increases 20x, GI tract decreases, brain stays the same

Question 23

F = P / R

Answer 23

Flow = pressure gradient / resistance

Question 24

pressure differences cause blood to move

Answer 24

yes

Question 25

Resistance in the pulmonary circuit is low

Answer 25

yup

Question 26

Factors Affecting Resistance to Flow

Answer 26

Viscosity of fluid =  Length of the vessel (L) Radius of the vessel (r)