HEART
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WHAT IS DEPOLARISATION
EXCITEMENT OF TISSUES AND NERVE IMPULSE, CONTRACTION
WHAT IS REPOLARISATION
REST
WHAT IS ORDER OF PACEMKAING
SA NODE, TO AV NODE, TO BUNDLE OF HIS, TO PURKINJE FIBRES, THEN VENTRICLES CONTRACT
WHAT SETS THE PACE OF TEH HEART
SA NODES
CAN YOU LIFE WITHOUT ACTIEV SA NODES
YES AV NODES CAN TAKE OVER BUT THEY MAY NOT BE AS EFFECTIVE
WHAT IS THE P WAVE ON AN ECG
ATRIAL DEPOLARISATION, CONTRACTION
WHAT IS THE QSR WAVE ON AN ECG
VENTRICULAR DEPOLARISATION, CONTRACTION
WHAT IS THE T WAVE ON AN ECT
VENTRICULAR REPOLARISATION, REST
WHAT IS A NORMAL HEART RHYTHM REFERRED TO AS
SINUS RHYTHM
WHAT IS TACHYCARDIA
INCREADES HR
ON AN ECG WHAT INDICATES ATRIAL FIBRILATION
P WAVE IS MISSING AND T WAVE IN SMALL
WHAT RECEPTORS TALK TO NOREPINEPHERINE
BETA 1
DO PARASYMPATHETICS HAVE AN EFFECT ON HEART MM
NO
WHEN THE HEART IS FINE THE MESSAGES GOING BACK TO THE CNS TRAVEL ALONG
CNX PARASYMPATHETIC NERVES
WHEN THE HEART IS WRONG, THEN MESSAGES GO BACK TO THE CNS VIA
T1-6 AFFERENT FIBRES
WHAT IS THE CARDIAC CYCLE
ALL OF THE EVENTS OF BLOOD FLOW THROUGH THE HEART IN ONE BEAT
WHAT IS CARDIAC OUTPUT
THE AMOUNT OF BLOOD PUNPED OUT BY EACH VENTRICLE OER MINUTE
POST SYNAPTIC SYMPATHETIC NEURONS ARE …… NEURONS, RECEIVING …….. NEUROTRANSMITTER
ADRONERGIC NOREADRENALINE
WHAT ARE THE DETERMINANTS OF HR
NEURAL = PARASYMP AND SYMP NS
SYMPATHETIC NERVOUS SYSTEM MESSAGES BIND TO THE ….. RECEPTORS ATE THE ….. NODE, ENHANCING …… ION ENTRY INTO PACEMAKER CELLS
BETA 1 SA CALCIUM
PARASYMPATHETIC NERVOUS SYSTEM MESSAGES BIND TO THE …… RECEPTORS AT THE ….. NODE AND …….. HR, OPENING THE ….. ION GATES
M2 SA DECREASES HR POTASSIUM
IF YOU HAVE TOO MUCH CALCIUM YOU HEART RATE WILL BE
INCREASED
IF YOU HAVE TOO MUCH POTASSIUM YOUR HR WILL BE
DECREASED
INCREASED THYROID HORMONE CAUSES
INCERASED HR AND VICE versa