Chapter 1-4 Flashcards
0
Q
Frank Starling’s Law
A
The more you stretch the heart muscle the harder it will contract
1
Q
Which side of the heart is thicker?
A
Left ventricle
2
Q
Four Characteristics to a Cardiac Muscle
A
Automaticity -Generate own stimulus Excitability -Ability to respond to electrical stimulus Conductivity -Transmit stimulus to other cells Contractility -Muscle contraction - pulse/systolic pressure
3
Q
Major Electrolytes
A
K,Na,Ca,Mg
4
Q
Atrial conduction
A
SA Node
60-100 BPM
Transfer impulse from SA node throughout the atria to the AV junction
Main source of electrical conduction in the heart
5
Q
Secondary Conduction System
A
AV Junction
AV Node
Bundle of His
40-60 BPM
6
Q
Third and final conduction system
A
Purkinje Network/Fibers
Spreads impulse throughout the ventricles
20-40 BPM
