Exam 3 Flashcards
What components are in the cardiovascular system
heart
blood vessels
blood
cardiac muscles cells have what
Has similar cell components as skeletal muscle cell (T tubule, sarcomeres,
sarcoplasmic reticulum, etc.)
* 1 nucleus
* Branched
do all cardiac cells conduct impulse?
no, some contract
What is the seminlunar
valve that keeps blood moving in one direction
what is the pulmonary semilunar valve
valve between right ventircle and pulmonary trunk
what is the aortic semilunar
valve between left ventricle and aorta
The chordae tendineae attached to a bicuspid (mitral/bicuspid/left
atrioventricular ) valve are diagnosed as being too long. How will that
affect the function of the valve when the left ventricle contracts?
Blood will be able to leak back into the left atrium.
what is the lub in lub dub
closing of av valve
what is the dub in lub dub
closing of semilunar valves
what is a heart murmer
whooshing sound of blood flowing back into chamber
mitral valve prolapse
common type of heart murmer
stenosis
narrow opening between valves
heart murmer
What type of cells conduct an electrical impulse through
the myocardium of the heart wall?
cardiac muscle
what are cardiac muscle cells
straiated
branches
uninuculate
intercalated discs between cells
fribrous skeleton is what
barrier between atria and ventricles that prevent an electrical impulse from passing
how many pathways are there from atria to ventricles
1, via AV node
cardiac conduction system
cells have autorythmicity
nodes and bundles in cardiac muscle conduct electrical impulses
pathway for CCS
Sinoatrial (SA) node
Atrioventricular AV Node
Atrioventricular AV bundle
right and left branches
punkinje fibers
Atria contracts how
top to bottom
simultaneously
ventricles contract how
bottom to top
simultaneously
what is the SA node
pacemaker of heart
Blood supply to heart comes from where
cardiac veins
altherosclerosis is what
build of plaque in arteries
Mydocardial infection is what
a heart attack
result of blood not reaching cardiac muscle tissue