Chapter 16 : CVS Regulation Flashcards
SA node stands for
sinoatrial node
SA node is also known as
the pacemacker
CVS control center is located where?
the medulla in the brainstem
the SA node is found where
right atria
both the SA & AV nodes are regulated by what
CVS control center
the release of ___________ leads to ___________
1st blank: catecholamine
2nd blank: tachycardia
the release of ________________ leads to ____________
1st blank: acetylcholine
2nd blank: bradycardia
tachycardia
HR greater than 100 bpm
bradycardia
HR less than 60 bpm
average person HR
60-80 bpm
when the sympathetic nervous system is engaged what happens
increased HR
increased contractility
increased vasodilation of arterioles of skeletal muscle
increased vasoconstriction of visceral arterioles
when parasympathetic nervous system is engaged what happens
decreased HR
decreased contractility
decreased vasodilation of arterioles of skeletal muscle
decreased vasoconstriction of the visceral arterioles
depolarization
contraction
membrane potential becomes more positive
influx of sodium
repolarization
relaxation
membrane potential becomes more negative
efflux of potassium
ECG measures ?
hearts electrical activity
P Wave measures?
atrial depolarization
QRS Complex measures
ventricle depolarization
T Wave measures?
ventricular repolarization
which electrical activity represents a person’s pulse?
QRS complex
sympathetic neurons cause
vasodilation and vasoconstriction
blood does what
transports, regulates, protects
blood transports through
cells, lungs, kidneys, lungs, liver
blood regulates through
body temp, pH buffers, hydration
where does the water come from within our blood?
our plasma
