Test#4: Thrombocytes And Exotics Flashcards

1
Q

What is Hemostasis?

A

The process that prevents and stops bleeding while maintaining blood in a fluid state within the circulatory system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are Thrombocytes?

A

Small blood cell fragments involved in clotting.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Define Thrombus.

A

A blood clot that forms in a vessel and remains there.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is an Embolism?

A

A clot or foreign material that travels in the bloodstream and can block a vessel.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is Von Willebrand’s Disease?

A

A genetic disorder causing defective platelet adhesion due to a deficiency of von Willebrand factor.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Define Hemophilia.

A

A genetic disorder where blood does not clot properly due to missing clotting factors.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Thrombocytopenia?

A

A condition of low platelet count, leading to increased bleeding risk.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a Cicatrice?

A

A scar formed after wound healing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define Eschar.

A

A dry, dark scab or slough that results from a burn or necrotic tissue.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Thrombin?

A

An enzyme that converts fibrinogen to fibrin in the clotting process.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does Melena indicate?

A

Black, tarry stools indicating upper gastrointestinal bleeding.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are Petechiae?

A

Small red or purple spots on the skin due to minor bleeding under the skin.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What chemicals are released by sticky platelets?

A
  • ADP (Adenosine Diphosphate)
  • Thromboxane A2
  • Serotonin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are platelets derived from?

A

Fragments of megakaryocytes, large cells in the bone marrow.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

List the functions of platelets.

A
  • Forming a temporary platelet plug
  • Releasing chemicals that promote clotting
  • Supporting blood vessel repair and healing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Where are coagulation factors primarily produced?

A

In the liver.

17
Q

Which clotting factor is present in plasma but not serum?

A

Fibrinogen (Factor I).

18
Q

What hormone stimulates platelet production?

A

Thrombopoietin.

19
Q

How many platelets can one megakaryocyte produce?

A

1,000–3,000 platelets.

20
Q

How quickly can a clot start forming after injury?

A

Within 15–20 seconds.

21
Q

What is Clotting Factor #1?

A

Fibrinogen.

22
Q

What are the signs of thrombocytopenia?

A
  • Petechiae
  • Purpura
  • Prolonged bleeding
  • Spontaneous bleeding (e.g., nosebleeds or blood in urine)
23
Q

Why is gentle blood collection important for clotting tests?

A

Damaging the blood vessel can activate clotting factors prematurely, leading to inaccurate test results.

24
Q

What does DIC stand for?

A

Disseminated Intravascular Coagulation.

25
Q

Which vitamin deficiency affects clotting?

A

Vitamin K deficiency.

26
Q

What does Buccal mucosa bleeding time (BMBT) measure?

A

How long it takes for small blood vessels in the mucosa to stop bleeding after being pricked.

27
Q

Which animals have heterophils instead of neutrophils?

A

Birds, reptiles, amphibians, and rabbits.

28
Q

Which animal has Kurloff bodies?

A

Guinea pigs.

29
Q

Which species’ RBCs may sickle after collection?

30
Q

Which species has non-nucleated ovalocytes as normal RBCs?

A

Camelids (e.g., camels, llamas, alpacas).

31
Q

Which animals are more prone to blood parasites?

A

Reptiles, birds, and some wild mammals.

32
Q

What is the predominant leukocyte in rabbits?

A

Lymphocytes.

33
Q

What is the CBC interpretation of bacterial infection in rabbits?

A

A heterophilic response may show heterophilia with a left shift.

34
Q

Which animal has more basophils than other mammals?

35
Q

What is the maximum blood collection volume per single draw?

A

Should not exceed 1% of body weight.