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BIOMEDICAL SCIENCE FOR OSTEO 7 > DETERMINANTS OF BLOOD PRESSURE > Flashcards

DETERMINANTS OF BLOOD PRESSURE Flashcards

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1
Q

WHAT IS BLOOD PRESSURE

A

TEH FORCE EXERTED BY BLOOD AGAINST A UNIT AREA OF BLOOD VESSEL WALLS, EXPRESSED IN mmHg

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2
Q

WHAT SYSTOLIC BP

A

THE PRESSURE EXERTED BY BLOOD ON BLOOD VESSEL WALLS DURING VENTRICULAR CONTRACTION

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3
Q

WHAT IS DIASTOLIC BP

A

THE PRESSURE EXERTED ON BLOOD VESSEL WALLS DURING VENTRICULAR RELAXATION

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4
Q

WHAT IS PULSE PRESSURE

A

THE DIFFERENCE BETWEEN SYSTOLIC AND DIASTOLIC BP

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5
Q

WHAT IS MEAN ARTERIAL PRESSSURE

A

THE PRESSURE IN THE ARTERIES DURING ONE CARDIAC CYCLE

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6
Q

WHAT IS THE IDEAL MAP

A

MORE THAN 60

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7
Q

WHAT IS RESISTANCE

A

OPPOSITION TO BLOODFLOW , THE MEASURE OF FRICTION BLOOD ENCOUNTERS AS IT PASSES THROUGH VESSELS

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8
Q

WHAT ARE SOURCES OF RESISTANCE

A

BLOOD VESSEL DIAMETER - SMALLER LUMEN = MORE RESISTANCE
BLOOD VISCOSITY = MORE THICKBNESS = MORE RESISTANCE
BLOOD VESSEL LENGTH = LONGER VESSEL = MORE RESISTANCE

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9
Q

WHICH BLOOD VESSELS ARE THE MAJOR DETERMINANTS OF RESISTANCE

A

ARTERIOLES

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10
Q

ARE NERUAL MECHANISMS SLOW OR FAST

A

REALLY FAST

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11
Q

WHAT ARE THE TWO NEURAL REFLEXES ASSOCIATED WITH THE CARDIOVASCULAR CONTROL CENTRES

A

BARORECEPTOR REFLEX AND CHEMORECEPTOR REFLEX

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12
Q

WHAT DOES A BARORECEPTOR DETECT

A

STRETCH

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13
Q

IN WHICH TWO PLACES ARE BARARECEPTORS

A

AORTIC ARCH AND CAROTID SINUS

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14
Q

WHICH CRANIAL NERVES DO STRETCH SIGNALS CONDUCT TO THE MEDULLA VIA WHEN COMING FROM THE AORTIC ARCH AND CAROTID SINUS

A

AORTIC ARCH = VAGAS
CAROTID SINUS = GLOSSOPHARYNGEAL

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15
Q

WHAT ARE THE THREE CARDIOVASCULAR CENTRES IN THE MEDULLA

A

CARDIOACCELATORY
CARDIOINHIBITORY
VASOMOTOR SYSTEM

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16
Q

BARORECEPTOR SIGNALS COMING FROM THE CARDIAC CENTRES IN THE MEDULLA THEN STRANSFER SIGANALS TO WHICH DIVIDISION OF THE NERVOUS SYSTEM

A

SNS

17
Q

WHAT EFFECT DOES THE SNS HAVE ON VESSELS

A

VASOCONSTRICT TEH MUSCULAR ARTERIES

18
Q

WHAT DO CHEMORECEPTORS PICK UP ON

A

DECREASED PH OR O2

19
Q

WHAT DOES THE CARDIOACCELATORY CENTRE DO

A

INFLUENCES SYMPATHETIC SUPPLY TO HEART - INCREASING HR AND CONTRACTILITY, TRAVELLING ALONG T1-5/6 NERVES

20
Q

WHAT DOES THE CARDIOINHIBITORY CENTRE DO

A

INFLUNCE PARASYMPATHETIC NERVOUS SUPPLY TO THE HEART, DECREASING HR, NEURAL PROJECTIONS TO TEH DORSAL MOTOR NUCLEUS OF CNX

21
Q

WHAT DOES THE VASOMOTOR CENTRE DO

A

INFLUENCE SUMPATHETIC NERVOUS SUPPLY TO ARTERIOLAR SMOOTH MM CAUSING VASOCONSTRICTION

22
Q

WHAT IS RESPONSIBLE FOR LONG TERM REGULATION OF BP

A

THE KIDNEYS AS THEY CAN GET RID OF (URINATE) OR REABSORB FLUID

23
Q
A

BIOMEDICAL SCIENCE FOR OSTEO 7 (14 decks)

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