Cardiac system

Question 1

myocardium has what

Answer 1

2 ventricles and 2 atria

Question 2

nerve supply is from where

Answer 2

both symp and parasymp of ANS

Question 3

myocardium of which ventricle is thicker

Answer 3

left

Question 4

cardiac vein will deliver blood to coronary sinus back to the

Answer 4

RA

Question 5

double- walled sac is cmposed of

Answer 5

superficial fibrous pericardium

deep 2 layer serous persicardium

Question 6

2 circuits if the heart

Answer 6

pulmonary

systemic

Question 7

cardiac cycle phases

Answer 7

atrial diastole+systole
ventricular filling
ventricular systole
ventricular diastole

Question 8

what is the pulse

Answer 8

surge of pressure in artery

Question 9

Tachy

Answer 9

HR exceeds 100bpm

Question 10

Bradycardia

Answer 10

HR less than 60bpm

Question 11

Co=

Answer 11

HR*SV

Question 12

Ejection fraction

Answer 12

% of EDV pumped by ventricle

Question 13

blood preassure is

Answer 13

force exerted by blood against blood vessel wall

Question 14

inc BP

Answer 14

blood volume increases
HR increases
SV increases

Question 15

after-load

Answer 15

load that pre-load muscle has to work against

Question 16

factors whcih affect after-load

Answer 16

pre-load

Question 17

what is frank-starling mechanism:

Answer 17

change heart force in response to chance in venous return

Question 18

increasing contractile will increase what

Answer 18

CO

Question 19

Increased HR can cause what

Answer 19

increased CO

Question 20

hypertension is when the ……… pressure is too high

Answer 20

atrial

Question 21

how do you treat hypertension

Answer 21

lifestyle
drug therapy
Ca2+ channel blockers

Question 22

what will ACE convert

Answer 22

angiotensin 1 to angiotensin 2

Question 23

use ACE inhibitors

Answer 23

inhibit formation of angiotensin

decreases the release of aldestrone

Question 24

cardiomyocyte membrane potential

Answer 24

resting potential=K equilibrium potential

Question 25

phase 0 of action potential: ........... depolarasisation membrane potential rise to ..... to ..... na gates are .......... and na permeability falls

Answer 25

rapid +20 +30 inactivated

Question 26

phase 1 of action potential: initial ............ stimulate ..... of .... Type voltage gated Ca2+ ........

Answer 26

repolaristion open L channels

Question 27

phase 2 of action potential: .......... phase ...... balances ......... flow

Answer 27

plateu K Ca

Question 28

phase 3 of action potential: ............... K channel remain ...........

Answer 28

re polarisation | open

Question 29

phase 4 of action potential: | .................

Answer 29

resting potential

Question 30

in an electrocardiogram what does the P wave represent

Answer 30

depolarise Atrial myocardium

Question 31

in an electrocardiogram what dos the QRS complex show

Answer 31

ventricular depolarasiaion

Question 32

in an electrocardiogram what does the T wave show

Answer 32

repolarsiation of the ventricles