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Blood/lymphatic system > Platelets/Thrombocytes > Flashcards

Platelets/Thrombocytes Flashcards

1
Q

What are platelets also called?

A

thrombocytes

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2
Q

What is the function of platelets?

A

help initiate formation of blood clots, close breaks in damaged blood vessels

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3
Q

What is blood plasma made up of?

A

92% water and proteins (liquid portion of blood)

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4
Q

What proteins are in plasma?

A

albumin, fibrinogen, globulins

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5
Q

What percentage of blood is plasma?

A

55%

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6
Q

What is the function of plasma?

A

transport nutrients, gasses, vitamins, maintain fluid and electrolyte balance, and pH

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7
Q

What are albumins for?

A

blood pressure

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8
Q

What are globulins for?

A

transport antibodies

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9
Q

What is fibrinogen for?

A

blood clotting

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10
Q

How is myeloma cancer different from leukemia?

A

effects the plasma cells rather than blood cells

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11
Q

What is hemostasis?

A

process of stopping bleeding, involves coagulation and the clotting of blood to seal site of damage

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12
Q

What is coagulation?

A

the thickening of blood to form a clot (hematoma)

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13
Q

What is the first key event in hemostasis?

A

blood vessel spasm, the vasoconstrictor (serotonin) shrinks the vessel

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14
Q

What is the second key event in hemostasis?

A

platelet plug formation, closes the opening

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15
Q

What is the final event in hemostasis?

A

blood coagulation, fibrin forms over the plug and reinforces (forms a scab)

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16
Q

What is thrombin?

A

an enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin

17
Q

What is thrombus?

A

an abnormal blood clot

18
Q

What is embolus?

A

when the clot moves to another place

19
Q

What is a pulmonary embolism?

A

when a blood clot goes to the lungs

20
Q

Why are newborns given vitamin K injections?

A

prevents a bleeding disorder called “vitamin K deficiency bleeding”

21
Q

What is hemophilia?

A

“bleeders disease”, carried on the X chromosome from mother to son, blood doesn’t clot & leads to crisis w/ minor injuries

22
Q

If a woman is a carrier for hemophilia, what is the chance of having a child w/ the disease?

A

25%

23
Q

How much blood is taken for a blood donation?

A

1 pint of blood (1/2 liter), 10% of blood

Blood/lymphatic system (4 decks)

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