Quiz 2 Flashcards
the cardiovascular system has how many chambers?
- 2 upper and 2 lower
the upper chambers are what?
receiving chambers
which side services the whole body?
left
what is it called when 1 pump services the whole body?
systemic circulation
what are the functions of the right atrium?
- receive blood from venous side of system
- move/contract final 30% of blood into right ventricle
what is a heart murmur?
when some of the blood flows backwards back into the right atrium
arteries carry blood —- from heart, veins carry blood —- heart
away, to
why is high BP bad?
makes heart work harder and difficult to push blood through system
PAT (paraxysmal atrial tachycardia)
atria contracts very rapidly. feel in chest
tachycardia
fast HR
bradycardia
slow HR
ejection fraction
when you fill up ventricles they do not empty completely
what is typical ejection fraction?
65-70%
cardiac output
amount of blood pumped out each minute
cardiac output is a combination of
- how many times your heart beats
- HR
- SV
cardiac output =
HR x SV
what does it mean if there is a huge SV?
huge cardiac output. can circulate a lot more blood and deliver more oxygen which makes more energy
why would you take BP at ankle?
to see if pressure in ankle is same as pressure in arm
when glucose in blood stream gets too high what happens?
it randomly attaches to proteins, which is destructive
arterioles operate with
vasomotor tone
what is vaso motor tone
always contricted 50% half open half closed to give most rapid response
purpose of cardiovascular system
get blood into capillaries
purpose of respiratory system
get oxygen into alveoli
what occurs in capillaries
gas exchange and nutrient exchange
kcal equivalent table is driven by the
fuel mix
kcal equivalent table tells
how many kcal you are producing per L of oxygen consumed
systole means
heart is beating and contracting, it is active
diastole means
heart is resting
what is arteriole pressure typically
120/80
precapillary sphincter
open this if you want to push blood into capillaries
in the venous side, what is the pressure?
0-10
when taking BP, interested in
the 1st and 5th sounds
1st sound represents what
systolic pressure
the pacemaker is also called
sinoatrial node
what does the pacemaker do
sets the pace, triggers electrical impulse
what is automericity?
every cell can generate electrical impulses
where is the pacemaker located?
the R atrium
what is the P wave?
depolarization.
what is QRS wave
depolarization of ventricles
what is T wave
repolarization of ventricles
what does EEG measure
brain waves
what is the job of the atria?
squeeze blood and push down
what is the job of the R ventricle?
lungs and back
what is the job of the L ventricle?
everywhere
what happens in skeletal muscle?
every fiber is surrounded by insulation of connective tissue. has its own nerve supply
what happens in cardiac muscle?
generates as much force as it can and all fibers contract at the same time
sympathetic nervous system
fight or flight. save your life
parasympathetic nervous system
rest and digest
parasympathetic operates from
vagus nerve
vagal escape is what
find parasympathetic/vagus nerve, put electrode and stimulate. if strong enough stop pacemaker and stop heart
cardiovascular control center does what
influence what goes on with the 2 nervous systems
what do proprioceptors do
tell what is going on in body and positioning, how much tension in muscles
