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Animal Science 220 > Chapter 17 > Flashcards

Chapter 17 Flashcards

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Biology 101 flashcards
0
Q

Leukemia

A

An increase in the number of leukocytes in the circulating blood

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1
Q

Phagocyte

A

A cell that can engulf or devour bacteria, foreign matter, or other cells

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2
Q

Leukopenia

A

A decrease in the number of leukocytes in the circulating blood

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3
Q

White blood cellS: functions

A

Engulfs foreign matter

Produces antibodies

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4
Q

White blood cells: classifications

A

Granulocyte: presence of granules in cytes
A) neutrophils: stain in neutral fashion
B) basophils: stain basic
C) eosinophils: stain acidic

Agranulocyte:no granules in cyte
Monocytes
Lymphocyte

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5
Q

White blood cells: life span

A

Minutes to years

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6
Q

White blood cells: concentration

A

Thousands/microliter

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7
Q

Neutrophils

A

89% of total granulocytes
Most important white blood cell for fighting acute infection
Pass through capillary pores by diapedesis
Exhibit ameboid motion in tissue
Phagocytize foreign particles
Average of 20-25 bacteria removed by each neutrophil

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8
Q

Eosinophils

A

10% of granulocytes
Behaves similarly to neutrophils
Numbers increase during allergic reactions
Primarily detoxify foreign proteins
Numbers increase with some parasites
Lowered eosinophil counts have been associated with stress

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9
Q

Basophils

A

Approximately one percent or less of granulocytes
Little or no phagocytic action
Prevents intravascular blood coagulation
Prevents blood and lymph stasis during inflammation
Contains heparin (anticoagulant)
Vasoconstrictor (histamine)

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10
Q

Monocytes

A 
Originate in bone marrow
Large size 
Superior phagocytic properties
Predominant during chronic infection 
After moving to tissue...converted to macrophages
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11
Q

Lymphocytes

A 
Formed in lymph nodes
Can revert to monocytes, hemocytoblast, fibroblast
Can form and secrete antibodies
b form: produces antibodies
T form: fights viral infections
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12
Q

Leukemia

A

Abnormal growth and development of white blood cells

Leukemoid reaction: UNDER abundance of neutraphis WBC
chronic lymphocytic leukemia: over abundance of neutraphis WBC

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13
Q

Leukopenia

A

Too few WBC

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14
Q

Platelets

A 
Fragments produced from megakaryocytee
Makes sure body has zero leakage 
Plugs hole when bruised
Too many platelets causes clots 
Too few causes hemeridge
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Animal Science 220 (22 decks)

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