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Lecture 5

HLSC 1201U Lecture Notes - Lecture 5: Aldosterone, Homeostasis, Ejection Fraction


School
UOIT
Department
Health-Science
Course Code
HLSC 1201U
Professor
Elita P.
Lecture
5

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HLSC 1201U 1/25/2016
Chapter 30: Physiology of the Cardiovascular System
Hemodynamics
Hemodynamics—collec$on of mechanisms that in%uence the dynamic (ac$ve and
changing) circula$on of blood
Hemostasis (stopping blood from leaving blood vessels)
Circula$on control mechanisms must accomplish two func$ons
- maintain circulaon (energy + nutrients and collecon waste)
- vary volume and distribuon of the blood circulated
The Heart as a Pump
Conduc$on system structures are more highly specialized than ordinary cardiac muscle
$ssue and permit rapid conduc$on of an ac$on poten$al through the heart
Specialized pacemaker cells in the SA (sinoatrial- right atrium) node possess an intrinsic
rhythm
Contrac$on
Relaxa$on

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HLSC 1201U 1/25/2016
Electrocardiogram (ECG or EKG)
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