Final function of heart

Question 1

Systole

Answer 1

Contraction

Question 2

Diastole

Answer 2

Relaxation

Question 3

Atrial Systole

Answer 3

Atria contract, pump blood to ventricles; AV valves open, ventricles relaxed

Question 4

Ventricular Systole

Answer 4

Ventricles contract, AV valves closed, blood opens semi-lunar valves, blood-> pulmonary artery & aorta

Question 5

Diastole

Answer 5

Atria and ventricles in diastole, blood -> atria, AV valves open, blood -> ventricles (period of filling atrium from body)

Question 6

Sympathetic Stimulation (fight/flight)

Answer 6

SA node activity^; heart rate^ (chronatropic)

AV node conduction^; force of myocardium contraction^ (inotropic); trachycardia/dysrhythmia

Question 7

Parasympathetic stimulation (feed/breed)

Answer 7

SA node activity v, heart rate v (chronotropic) ; AV node conduction v, no effect on strength of contraction; brachycardia/dysrhythmia

Question 8

Vagolytic

Answer 8

Parasympathomimetic

Question 9

Cardiac output/function

Answer 9

rate x stroke volume

Question 10

1 min

Answer 10

5 L of blood

Question 11

Size, gender, age effect

Answer 11

bigger, males, older=slower

Question 12

^ stretch= ^ contraction

Answer 12

starlings law of the heart

Question 13

+ inotropic

Answer 13

^contraction force w/o ^stretching (sympathetic nervous system); -inotropic v contraction force