Please enable JavaScript.
Coggle requires JavaScript to display documents.
Cardio (Heart Anatomy (Membrane Channel Proteins (Mesothelium (secretes…
Cardio
Heart Anatomy
Membrane Channel Proteins
Pericardium/ Pericardial Sac
directly surrounds the heart and eefines the pericardial cavity
Epicardium
fused to the heart and is part of the heart wall
Mesothelium
secretes the lubricating serous fluid that fills the pericardial cavity
reduces friction as the heart contracts
Terms:
Depolarization
rapid increase of positively charged ions raises the membranet
+30 mV
Plateau
membrane potential declines slowly
Repolarization
membrane potential drops until it reaches resting levels
allows cycle to repeat again.
Cardiac Muscle Cell Physiology / Skeletal Muscle Cell Physiology
Compare:
striated; smooth muscles
Contrast:
Cardiac
attached to heart
Cell is short/ semi-spindle
Have Gap Junctions
involuntary controlled
one or two nuclei in the muscle cell
Skeletal
cylindrical
Synctium
voluntarily controlled
attaches to bone
multi nucleated
Cardiac Muscle Cell Physiology
Major Events of the Cardiac Cycle
Definitions:
Systole
period of contraction that heart undergoes while it pumps blood into circulation
Diastole
relaxation that happens as the chambers fill with blood
SA Node
highest rate of depolarization
Pacemaker
AV Node
septum prevents impulse from spreading directly to the ventricles without passing through the AV Node
EDV
Preload
end of atrial systole/ prior to atrial contraction
SV
ESV
Cardiac Cycle