Download hemostasis

Name _________________________________
# _____
Pts. ____ /17
HEMOSTASIS
Using the key choices, correctly complete the following description of the blood clotting
process. Insert the term and the letter in the answer blanks.
KEY CHOICES:
A. Break
B. Erythrocytes
C. Fibrin
D. Fibrinogen
E. Platelets
F. Prothrombin
G. Serotonin
H. Thrombin
I. Thromboplastin
Clotting begins when a __(1)__ occurs in a blood vessel wall. Almost
immediately, __(2)__ cling to the blood vessel wall and release __(3)__, which helps to
decrease blood loss by constricting the vessel. __(4)__ is also released by damaged cells
in the area. This chemical substance causes __(5)__ to be converted to __(6)__. Once
present, thrombin acts as an enzyme to attach __(7)__ molecules together to form long,
threadlike strands of __(8)__, which then traps __(9)__ flowing by in the blood.
1. __________________
4. __________________
7. __________________
2. __________________
5. __________________
8. __________________
3. __________________
6. __________________
9. __________________
For each true statement, write T. If any statements are false, correct the underlined term
by inserting the correction in the answer blank.
____________________________
Normally, blood clots within 5 – 10 minutes.
____________________________
The most important natural body anticoagulant is
histamine.
____________________________
Hemostasis means stoppage of blood flow.
____________________________
An abnormally low number of platelets is a
condition known as thrombopenia.
____________________________
An embolus occurs when a blood clot in an
unbroken blood vessel releases and flows freely in
the bloodstream.
____________________________
Erythropoietin is a hormone that is controlled by the
lungs to register the oxygen levels in the blood.
____________________________
The “clotting cascade” is triggered by the release of
Sodium which initiates the coagulation phase of
hemostasis.
____________________________
Hemophilia is called the “Bleeder’s Disease.”