Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
sequence of responses that stops bleeding?
|
hemostasis
|
|
|
|
different mechanisms that stop blood loss?
|
vascular spasm
platlet plug formation clotting |
|
|
|
seratonin causes?
|
vascoconstriction
|
|
|
|
extrinsic or intrinsic pathways lead to formation of?
|
prothombinase
prothombinase converts prothrombin into? |
thrombin
|
|
|
thrombin converts fibrinogen(soluble) into fibrin (insoluble) forming?
|
the threads of a blood clot.
|
|
|
|
in which pathway does Tissue factor (TF) or thromboplastin leaks into the blood from cells outside (extrinsic to) blood vessels and initiates formation of prothrombinase?
|
Extrinsic pathway
Fewer steps then intrinsic and occurs rapidly |
|
|
|
in which pathway are Activators are either in direct contact with blood or contained within (intrinsic to) the blood
|
intrinsic pathway
Outside tissue damage not needed Also forms prothrombinase |
|
|
|
what has 2 positive feedback effects?
|
thrombin
what are they? |
Accelerates formation of prothrombinase
Thrombin activates platelets Clot formation remains localized because fibrin absorbs thrombin and clotting factor concentrations are low |
|
|
the surface of RBCs contain genetically determined assortment of antigens called?
|
Agglutinogens
|
|
|
|
Blood groups are based on presence or absence of ?
|
various antigens
|
|
|
|
Type A blood has only antigen ?
|
A
and has antobodies to? |
B blood
|
|
|
Type B blood has only antigen
|
B
and has antibodies to? |
A blood
|
|
|
Type AB blood has antigens?
|
A and B
no antibodies; universal recipiants |
|
|
|
Type O blood has ____ antigen?
|
neither antigen,
which means they have antobodies to? |
both A and B blood; universal donor, but can only recieve type O
|
