2.4 blood pressure and and heart disease Flashcards
is your circulatory system similar to a baloon or a fan? and how?
a bloon. your heart pumps blood into the heart every time it beats
instead of blowing air into it
what do your heartbetas force, and to do what?
your blood, force out of the heart into atreries under pressure
what is your blood pressure?
the pressure put on the walls of your arteries by the blood
where is the blood pressure heighest, and where lowest?
highest: arteries
lowest: veins
where can you feel the pulse of your heartbeat?
side of your neck, or inside of your wrist
where do doctors measure your blood?
and what’s it called
at a large artery in your arm
what are blood measurments expressed in?
millimiters of mercury, and in two numbers.
mm of mercury = mmHg
example of 2 numbers: 120 over 80
what is the first number in the blood pressure measurment expression called? and what does it mean?
systole = the pressure when the ventricles contract and blood is pushed away from the heart
what is the second number in the blood pressure measurment expression called? and what does it mean?
diastole = lowered pressure caused when the ventricles relax and fill up with new blood
does blood pressure stay the same at all time? according to what does it change?
no. it changes to meet your body’s needs
when does your blood pressure go up? and when does it go down again to normal level?
up: active, angry, scared, stressed
normal: calm, at rest
what’s the “name” if blood pressure remains high?
hypertension
why is hypertension bad?
the heart must work harder to keep the blood flowing which places an extra strain on it
strain - מאמץ
what can hypertension lead to?
heart attack, heart failure, kidney disease, stroke
when does a stroke occur?
stroke = שָׁבָץ
when one of the arteries that transport blood to the brain is blocked or ruptured.
ruptured = נקרע
what is one cause of hypertension?
atherosclerosis
atherosclerosis = טרשת עורקים
what is atherosclerosis?
a condition in which fatty materials comming from fried and greasy food are deposited on the inside walls of the arteries.
where can the build up fat occur?
the build up fat from the condition atherosclerosis
in any artery in the body, but deposits in the coronary arteries are espeicially dangerous
what happens when there’s a clogged artery?
increase of the blood pressure inside it.
what happens when fatty deposits completely block the artery?
the blood flow stops
what happens when the coronary circulation is blocked, and what can it result?
part of your cardiac tissue and stop functioning properly, potentitally resulting a heart attack m
how is a plaque fromed?
plaque = רובד
when the fatty deposits inside an artery become stiif and hard
fatty deposits = המשקעים השומניים
what does a plaque cause?
the artery loses its elasticity and is no longer able to expand with the rhythm of the heartbeat. it can also burst. this is the cause of a stroke.
what are factors that increase the chance of getting heart disease are?
a poor diet (too salty and fatty), smoking, lack of regular exericses, stress and age.
what is a cardiac arrest?
when a person’s heart stops beating
how can somebody’s life be saved from a cardiac arrest?
if an AED is close by. .
how does the AED save lives?
gives an electircal shock in ordee to get the heart beating again.
