Unit 11 Patho Flashcards

1
Q

How does blood separate in a centrifuge?

A

Heavy RBCs go to the bottom, leaving a “buffy layer” of lighter WBCs and platelets in the middle, and plasma on top.

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2
Q

Describe the organic and inorganic elements of plasma?

A

Organic consist of: Amino Acids, Proteins, Glucose, Lipids, and Nitrogenous waste

Inorganic consist of: Water, Ions, Gases, and Trace elements and vitamins.

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3
Q

Describe the job of RBCs, WBCs, and Platelets.

A

RBCs: transport oxygen and carbon dioxide

WBCs: Immune response

Platelets: Cell fragments that are essential to blood clotting (Coagulation)

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4
Q

Distinguished the functions of WBC subtypes. (Lymphocytes, monocytes, neutrophils, eosinophils, basophils)

A

Lymphocytes: Produce specific immune responses directed against invaders.

Monocytes: Phagocytes that develop into macrophages.

Neutrophils: Phagocytes that engulf foreign particles.

Eosinophils: Produce toxic compounds directed against invading pathogens.

Basophils: aka Mast cells, allergy response.

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5
Q

What is hematopoiesis?

A

Synthesis of blood cells in the marrow of all bones.

Bone marrow contains hemoglobin

Controlled by cytokines

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6
Q

What is Pluripotent hematopoietic stem cell?

A

-Cells that develop into many different cell types.

Found in bone marrow

Stem cells -> Progenitor cells (differentiate into RBCs, WBCs and platelets) -> develop into different cells

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7
Q

What are the major cytokines the regulate RBCs, WBCs, and Thrombopocyte maturation?

A

RBCs- Erythropoietin (EPO)

WBCs- Colony-stimulating factors, interleukins, stem cell factor

Thrombocyte maturation- Thrombopietin (TPO)

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8
Q

Describe function and characteristics of RBCs.

A

Biconcave disk lacking a nucleus. They contain hemoglobin, a red oxygen-carrying pigment.

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9
Q

What is hemoglobin?

A

Oxygen-binding protein of red blood cells.

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10
Q

What is bilirubin?

A

The spleen and liver convert remnants of the heme groups of hemoglobin to a colored pigment.

It’s carried by plasma albumin to the liver, where it’s metabolized and secreted as bile.

When elevated it causes jaundice

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11
Q

What are the causes of anemia based on RBC status?

A

Low hemoglobin content

(Blood loss)

Aplastic Anemia caused by certain drug or radiation

Anemia can be caused by iron deficiency, folic acid deficiency, vitamin B12 deficiency

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12
Q

What is Complete Blood Count (CBC) and its utility?

A

A blood panel that provides information about the status of a persons blood.

They are compared to normative standard ranges typically found in males and females

Abnormalities CBC values may indicate the potential for disease, including anemia, infection, allergy, and cancer.

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13
Q

What are high and low hematocrit conditions?

A

High hematocrit suggest, dehydration or polycythemia

Low hematocrit suggest anemia

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14
Q

What is the difference between total and differential WBC counts?

A

Indicates the body’s ability to fight infection

Total: includes all types of leukocytes but does not distinguish between them

Differential: Estimates relative proportions of each type of leukocytes

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15
Q

What are conditions associated with high and low WBC counts?

A

High: Infection, inflammation

Low: Cancer, chemotherapy or malnutrition

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16
Q

What is hemostasis and the major steps?

A

Hemostasis keeps the blood within a damaged blood vessels

1) vasoconstriction
2) blockage of platelet plug
3) coagulation

17
Q

Describe the formation of platelet plug.

A

Plug formation begins with platelet adhesion to exposed collagen in the damaged area. The adhered platelets become activated, releasing cytokines into the area around injury.

It’s a positive feedback loop

18
Q

What is coagulation cascade and its two pathways?

A

Coagulation cascade is a series of enzymatic reactions

Two pathways:
Intrinsic pathway- platelet and clotting factor

Extrinsic pathway- Tissue factor

Both pathways come together to make up clot

19
Q

Define fibrinolysis.

A

As a damaged vessel wall slowly repairs itself, the clot disintegrates when fibrin is broken into fragments by the enzyme plasmin. Plasmin then breaks down into fibrin.

20
Q

What are high or low hemoglobin conditions?

A

High hemoglobin suggest, polycythemia, renal cancer, or living in high altitude

Low hemoglobin suggest suggest anemia

21
Q

After four months when the RBCs die, where do they go?

A

They go to the spleen, and the hemoglobin from the dying cells are converted to bilirubin.