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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

Intercalated Discs

Join all cardiac cells