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BIOMEDICAL SCIENCE FOR OSTEO 7 > HEART > Flashcards

HEART Flashcards

1
Q

WHAT IS DEPOLARISATION

A

EXCITEMENT OF TISSUES AND NERVE IMPULSE, CONTRACTION

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2
Q

WHAT IS REPOLARISATION

A

REST

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3
Q

WHAT IS ORDER OF PACEMKAING

A

SA NODE, TO AV NODE, TO BUNDLE OF HIS, TO PURKINJE FIBRES, THEN VENTRICLES CONTRACT

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4
Q

WHAT SETS THE PACE OF TEH HEART

A

SA NODES

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5
Q

CAN YOU LIFE WITHOUT ACTIEV SA NODES

A

YES AV NODES CAN TAKE OVER BUT THEY MAY NOT BE AS EFFECTIVE

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6
Q

WHAT IS THE P WAVE ON AN ECG

A

ATRIAL DEPOLARISATION, CONTRACTION

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7
Q

WHAT IS THE QSR WAVE ON AN ECG

A

VENTRICULAR DEPOLARISATION, CONTRACTION

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8
Q

WHAT IS THE T WAVE ON AN ECT

A

VENTRICULAR REPOLARISATION, REST

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9
Q

WHAT IS A NORMAL HEART RHYTHM REFERRED TO AS

A

SINUS RHYTHM

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10
Q

WHAT IS TACHYCARDIA

A

INCREADES HR

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11
Q

ON AN ECG WHAT INDICATES ATRIAL FIBRILATION

A

P WAVE IS MISSING AND T WAVE IN SMALL

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12
Q

WHAT RECEPTORS TALK TO NOREPINEPHERINE

A

BETA 1

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13
Q

DO PARASYMPATHETICS HAVE AN EFFECT ON HEART MM

A

NO

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14
Q

WHEN THE HEART IS FINE THE MESSAGES GOING BACK TO THE CNS TRAVEL ALONG

A

CNX PARASYMPATHETIC NERVES

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15
Q

WHEN THE HEART IS WRONG, THEN MESSAGES GO BACK TO THE CNS VIA

A

T1-6 AFFERENT FIBRES

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16
Q

WHAT IS THE CARDIAC CYCLE

A

ALL OF THE EVENTS OF BLOOD FLOW THROUGH THE HEART IN ONE BEAT

17
Q

WHAT IS CARDIAC OUTPUT

A

THE AMOUNT OF BLOOD PUNPED OUT BY EACH VENTRICLE OER MINUTE

18
Q

POST SYNAPTIC SYMPATHETIC NEURONS ARE …… NEURONS, RECEIVING …….. NEUROTRANSMITTER

A

ADRONERGIC
NOREADRENALINE

19
Q

WHAT ARE THE DETERMINANTS OF HR

A

NEURAL = PARASYMP AND SYMP NS

20
Q

SYMPATHETIC NERVOUS SYSTEM MESSAGES BIND TO THE ….. RECEPTORS ATE THE ….. NODE, ENHANCING …… ION ENTRY INTO PACEMAKER CELLS

A

BETA 1
SA
CALCIUM

21
Q

PARASYMPATHETIC NERVOUS SYSTEM MESSAGES BIND TO THE …… RECEPTORS AT THE ….. NODE AND …….. HR, OPENING THE ….. ION GATES

A

M2
SA
DECREASES HR
POTASSIUM

22
Q

IF YOU HAVE TOO MUCH CALCIUM YOU HEART RATE WILL BE

A

INCREASED

23
Q

IF YOU HAVE TOO MUCH POTASSIUM YOUR HR WILL BE

A

DECREASED

24
Q

INCREASED THYROID HORMONE CAUSES

A

INCERASED HR AND VICE versa

25
Q

WHAT ARE THE DETERMINANTS OF SV

A

PRELOAD CONTRACTILITY AND AFTER LOAD

26
Q

WHAT IS PRELOAD

A

THE AMOUNT OF VENOUS RETURN, MORE RETURM = MORE PRELOAD = MORE STRETCH OF THE MM CELLS TO ACCOMMODATE INCREASED VENOUS BLOOD

27
Q

WHAT IS CONTRACTILITY

A

STRENGTH OF CONTRACTION OF THE HEART

28
Q

WHAT IS AFTERLOAD

A

TH EPRESSURE THAT THE VENTRICLES MUST OVERCOEM TO EJECT BLOOD

BIOMEDICAL SCIENCE FOR OSTEO 7 (14 decks)

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