Chapter 5- Cardiovascular System Flashcards
(32 cards)
The size of ones heart
Size of own fist
Location of heart
Left center
The heart is protected by ?
Pericardium, enclosed sack
Pericardial fluid
Within pericardium
What is the most powerful chamber and the largest?
Left ventricle
True or false the left ventricle increases with exercise training
True
Another word for Heart attack
Myocardial infarction
The right side of the heart is known as
Pulmonary side
The left side of the heart is known as
Systemic side
Sinoatrial node (SA)
A group of specialized cardiac fibers located in the upper posterior wall of the right atrium
Atrioventricular node (AV)
Conducts the impulse from the atria to the ventricles
Bundle of his
Send the impulse to the apex of the heart and then outward
Purkinje fibers
Bundle branches that subdivide off the bundle of hiss
The Vagus nerve when stimulated releases
Acetylcholine (ach)
Amount of heartbeats (normal)
60-80 beats
Sympathetic nervous system
Increase heart rate and force of cardiac contraction during physical or emotional stress
maximal sympathetic stimulation, HR=250 bpm
During sympathetic stimulation what is released and from where?
Epinephrine and norepinephrine are released from adrenal medulla
Bradycardia
Resting heart rate below 60 bpm
Tachycardia
Resting heart rate above 100 bpm
Premature ventricular contraction’s(PVCs)
skipped or extra beats
Ventricular Tachycardia
Three or more consecutive PVCs
Ventricular fibrillation
Contraction of the ventricular tissue is uncoordinated and can result in cardiac death
Arteries
Transport blood from the heart to the tissue and back
Normal resting blood pressure
120/80
