Thrombocytes

Question 0

What is the function to thrombocytes?

Answer 0

Absorb and carry plasma factors required for formation of fibrin and contributes to hemostasis

Question 1

What does a thrombosite look like?

Answer 1

Non-Nucleated, variable size, pale blue with purple/pink granules, tend to be sticky

Question 2

What is a megakaryocyte?

Answer 2

Largest cell in bone marrow

Question 3

How are thrombocytes formed?

Answer 3

In red bone marrow, are fragments of megakaryocyte

Question 4

How many platelets do canines have?

Answer 4

200,000-500,000/ul

Question 5

How many platelets do cats have?

Answer 5

300,000-800,000/ul

Question 6

How many platelts do horses have?

Answer 6

800,000-300,000/ul

Question 7

How many platelets are needed to make a clot?

Answer 7

50,000/ul

Question 8

What is hemostasis?

Answer 8

Arrest of bleeding or circulation

Question 9

When is hemostasis initiated?

Answer 9

When vascular injury disrupts blood vessels exposing surrounding tissue to flowing blood

Question 10

What is chemo taxis?

Answer 10

Use of chemicals to attract or repel something

Question 11

What are three things that work together to stop bleeding?

Answer 11

Blood vessels, platelets, clotting factors

Question 12

What is collagen?

Answer 12

Insoluble protein found in connective tissue

Question 13

What makes a platelet plug in an injured vessel?

Answer 13

Platelets adhere to outside tissue and release chemicals that cause platelet surfaces to become sticky and collect more platelets and also release substances for Vaal constriction

Question 14

What are extrinsic factors?

Answer 14

Ingredients found outside the vessels

Question 15

What are thromboplstins?

Answer 15

They accelerate the clotting mechanisms

Question 16

What are intrinsic factors?

Answer 16

All components necessary for clotting are present in normal blood but are slow.

Question 17

What are two extrinsic factors?

Answer 17

Collagen and thromboplastins

Question 18

What are two intrinsic factors?

Answer 18

Clotting factors and platelets

Question 19

Explain the cascade of coagulation

Answer 19

Extrinsic factors: collagen, and thromboplastkns to accelerate the process.
Intrinsic factors: prothrombin will creat thrombin, fibrinogen will combine with thrombin and creat fibrin wich will join with platelets to creat the clot

Question 20

How do the clots retract?

Answer 20

Fibrin mesh work will shrink and become more dense and stronger and push serum out.

Question 21

Explain clot dissolution

Answer 21

Enzyme plasmin (fibrinolysin) is activated by damaged tissues and thrombin from inactivated form plasminogen. Plasmin is breaks down clot after a few days to build up

Question 22

What are two substances that can prevent clots?

Answer 22

Heparin and plasmin

Question 23

What prevents platelets from adhering?

Answer 23

Smooth lining of vessels

Question 24

What are intravascular clots?

Answer 24

Clots that occasionally occur within the vasculature system

Question 25

What is thrombus?

Answer 25

A clot that adheres to a vessel wall

Question 26

What can a thrombus do?

Answer 26

Can block blood supply to the heart and cause heart damage

Question 27

What is an embolus?

Answer 27

Intravascular clot floating in the blood and can be lodged in small vessels blocking blood flow and causing damage