Term
Cardiovascular System
Function |
|
Definition
Pump O2 and nutrients for metabolism to make ATP.
carries hormones to various tissues/cells
carries by products of metabolism which need to be expired. |
|
|
Term
Artery
Vein
Top:
Bottom:
Right:
Left: |
|
Definition
Right/Left Atria
R/L: Ventricle
Right: Collects/pumps blood (DE oxygenated) lungs
Left: Collects/pumps oxygenated periphery |
|
|
Term
| Blood Flow through artery |
|
Definition
| Blood > Superior/inferior vena cava >right atrium > tricuspid valve > right ventricle > Pulmonary Artery (takes blood to get oxygen |
|
|
Term
| Electrical Conduction System through heart |
|
Definition
| SA > AV > Bundles of his > Branches > Purkinje Fibers |
|
|
Term
Cadiac Action Potential
Phase 0 - 4 |
|
Definition
0, Na rushes in once threshold hit
1, K starts to leave
2, Ca starts to come in to balance K going out
3, K is pushed out of cell
4, Concentration gradient re established. |
|
|
Term
T tubule system of the heart
What's needed to make cardiac contraction?
Why would our body do that? *tetany* |
|
Definition
Ca needs to come in from extracellular fluid so that sacroplasmic reticulum releases it. "Calcium induced, calicium released." Phase 2
>extra Ca ion to enter cardiac cell
K channels that are not fast
> chronic state of contraction
since reestablishment of concentration gradient in cardiac muscle is slow, cant tetany in heart. |
|
|
Term
Cardiac Cycle - Systole
Stroke Volume, Cadiac Output |
|
Definition
Ventricular Contraction
>Stroke Volume = amount of blood ejected during cardiac contraction.
>Cardiac Output =: HR x SV |
|
|
Term
| How to send out more blood |
|
Definition
. Increase HR
. Increase SV
>Decrease ESV - forceful contraction
> Increase EDV - increasing amount of blood that fills chamber |
|
|
Term
Cardiac Cylce - Diastole
Left Ventricle does what? |
|
Definition
Ventricle relaxation
Left ventricle creates a pressure wave in aorta. Its maintained by other arteries in body |
|
|
Term
Hypertension
Beta Blocker
Diuretic
Vasodilator |
|
Definition
>HBP
> Lower HR
>Increase HR
> lower PR |
|
|
Term
Heart Disease
Atherosclerosis
Arteriosclerosis |
|
Definition
>narrowing of coronary artery
>irreversible hardening of arteries |
|
|
Term
Injury Hypothesis
Three layers |
|
Definition
Intima: innermost layer - lined with endothelial cells
Media: smooth muscle cell - adjust diameter
Adventitia: connective tissue and collagen fibers |
|
|
Term
Injury Hypothesis
Shit that goes down. 6 things! |
|
Definition
Injury to endothelial cells exposes intima
In response, platelets cover it up.
They release a chem PDGF, making endo cells multiply
Causing cells to invade luman.
Fat, cholesteral, and TriG becaome stuck in artery
Causing arteriosclerosis. |
|
|
Term
| Circulatory control - parallel system |
|
Definition
constriction doesn't impact blood flow
How your body is able to redirect blood flow to areas that need a lot of blood *fight or flight* |
|
|
