Topic 12: Cardiovascular System - Blood (CT) - WBC Flashcards
1
Q
What are characteristics of WBC? (3)
A
- nucleated
- life span varies from days to years
- defend against disease
2
Q
What are 2 types of WBC?
A
- Granulocytes
- Agranulocytes
3
Q
What are 3 types of granulocytes?
A
- Netrophils
- Eosinophils
- Basophils
4
Q
What are neutrophils? (3)
A
- 60%
- All phagocytic (engulf and ingest invaders)
- kill bacteria
5
Q
What are Eosinophils? (2)
A
- attack parasites (worms)
- 3%
in lecture, not a phagocyte
6
Q
What are Basophils?
A
- 1%
- release histamines to increase inflammation and heparin to decrease local clotting
7
Q
Agranulocytes include what type of cells? (2)
A
- lymphocytes
- Monocytes
8
Q
What are lymphocytes for?
A
- 35%
- immunity
9
Q
What are T lymphocytes?
A
- kill infected/diseased cells directly
10
Q
What are B lymphocytes?
A
- become plasma cells produce antibodies (Y globulin)
11
Q
What are monocytes? (3)
A
- 5%
- enter tissue + enlarge to become macrophages
- phagocytic
- in lecture, they leave bloodstrem
12
Q
What are platelets? (3)
A
- fragments of cells called megakaryocytes
- involved in clotting
- life span of 10 days if not used for clotting
13
Q
What is hemopoiesis/hematopoiesis?
A
- formation of blood cells
14
Q
From where do all blood cells arise?
A
- arise indirectly from hemocytoblast cells (stem cells) in red bone marrow
15
Q
Where can you find red marrow in adult? (3)
A
- axial skeleton
- pelvic and pectoral girdles
- proximal ends of humerus and femur
