Flashcards in Need to Work on for Test Deck (84)
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1
Intravascular Clotting
Thrombosis and Embolism
2
Three Hemostatic Mechanisms
Platelet Plug
Vasoconstriction
Blood clotting
3
Second Stage of Clotting
Prothrombin + Prothrombin Activator = Thrombin
4
Fourth Stage of Clotting
Fibrin + Factor XIII = Fibrin Polymer
5
Thrombosis
Formation of a clot in an unbroken blood vessel
6
Rh Plasma
Does not contain anti-Rh unless exposed as a fetus
7
Platelets/Thrombocytes
Aid in clotting
130,000-400,000
2nd most abundant
8
Myocardium
Muscular portion
Contracts in a spiral motion
9
Neutrophils
Most abundant (60-70%)
Increase during bacterial infections
10
Fibrous Pericardium
CT membrane
Outer layer
11
Intrinsic
Factor VII activates Factor X
12
Eosinophils
2-4%
Increase during parasitic infections
13
Extrinsic
Factor III + Factor VII + Ca++ = Factor X
14
Lymphocytes
25-33%
B Cells and T Cells
15
Basophils
0.5%
Release heparin and histamine
16
Monocytes
3-8%
Antigen-presenting cells
Macrophages
Increase in viral infections and inflammation
17
Myeloid Leukocytes
Granulocytes
18
Three Features of Intercalated Discs
Interdigitating folds
Mechanical junctions
Electrical junctions
19
Premature Ventricular Contraction
QRS inverted
Common in college students
20
Action Potential of Ventricular Cardiocyte
Na channels open
Na depolarizes membrane
Na closes and voltage peaks at 30mV
Ca enters and causes a plateau
Ca closes and K repolarizes
21
Left Coronary Artery
Anterior Interventricular Artery
Circumflex Artery
22
Pacemaker Physiology
Slow leak Na enters
Ca opens at -40mV
K channels open at 0mV
Repeat once polarization is complete
23
Right Coronary Artery
Posterior Interventricular Artery
Marginal Artery
24
Myocardial vs. Skeletal
Skeletal: voluntary, excitation coupling
Myocardial: involuntary, SA node
25
Heart Block
Conduction is weak through AV bundle
26
Similarities Between Myocardial and Skeletal
Striated
Z-discs
Tropomyosin and troponin
27
Conduction System of the Heart
SA node fires
Excitation through atrial myocardium
AV node fires
Excitation travels down AV bundle
Purkinje fibers distribute
28
Electrical Activity
Atria depolarize (P)
Depolarization complete
Ventricles depolarize while atria repolarize (QR)
Ventricular depolarization is complete (S)
Ventricles repolarize (T)
Repolarization ocmplete
29
Structure of Cardiac Muscle
Cardiocytes
Intercalated discs
T-tubules
Fatty acids as fuel, glucose at rest
30
