Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

BMLT

Lab 5

QuestionAnswer
Formed from megakaryocytes residing in the bone marrow; released into peripheral blood platelets (thrombocytes)
how long to platelets circulate? what are they removed by? 9-12 days; liver and spleen
What are the 3 zones of a platelet? peripheral, sol-gel, organelle
Direct contact with blood, coagulation factors interact here, stickiness peripheral
microtubules and microfilaments; shape changes sol-gel
platelet metabolism organelle
What are the 3 main functions of a platelet? 1. maintain vascular epithelium 2. respond to vascular injury by producing platelet plug 3. participate in plasma coagulation and help form fibrin clot
Reference value for normal peripheral blood platelet count 150,000-450,000/mm^3 (ul)
How do you collect a satisfactory peripheral blood specimen for use in platelet counts? venous blood; EDTA anticoagulant
Red blood cell diluting pipette Capillary tube
Platelet diluting fluid 1% ammonium oxalate
Functions of platelet diluting fluid lyse RBCs, dilute out WBCs and platelets
Charge hemocytometer pipette at a 45 degree angle, tip at edge of coverglass, squeeze a drop of fluid and capillary action will draw it in
How do you prevent double counting of platelets? Don't count platelets on the bottom or right border, count them if at the top or left border
What is hemostasis The process which has evolved to prevent spontaneous bleeding and stop bleeding that has been initiated by trauma
vasoconstriction vascular
diversion of blood flow around an injured area vascular
activating platelets vascular
activating coagulation system when a clot is required vascular
maintenance of health vascular epithelial cells by releasing an endothelial growth factor platelet
stoppage of bleeding by forming platelet plug platelet
creation of stable hemostatic plug platelet
coagulation factors form fibrin coagulation
coagulation cascade coagulation
extrinsic and intrinsic pathways and common pathway coagulation
plasmin degrades fibrin and reestablishes blood flow fibrinolytic
promotes healing fibrinolytic
PT prothrombin time
used to monitor action of extrinsic system prothrombin time
APTT Activated partial thromboplastin time
evaluates function of intrinsic system APTT
what is the anticoagulant used in a one-stage PT sodium citrate, blue tube top
Whats the difference btwn serum and plasma serum is plasma without clotting proteins
what type of patient sample is used in a one-stage PT venous blood
typical reference value for PT 10-13 seconds
What reagent is used to preform a PT; what substances in it cause it to clot? thromboplastin - CaCl2 reagent; calcium and thromboplastin factor III