Connective Tissue Flashcards Preview

Cell Biology > Connective Tissue > Flashcards

Flashcards in Connective Tissue Deck (64)
Loading flashcards...
1

Name the germ layers in the embryo

Endoderm, Mesoderm, Ectoderm

2

What does mesenchymal tissue do?

Mesenchymal tissue creaes adult connective tissue like blood, supportive and proper tissues

3

What is adipose tissue dervied from?

The mesoderm, this separates brown and white fat

4

Where is connective tissue derived from?

Mainly the mesoderm

5

What is the main function of connective tissue?

Structural support

6

What functions does connective tissue provide?

Structural support, cushioning, delivery and storage of nutrients, cell repair

7

What is a fixed (resident) cell?

A cell that does not move from the tissue in which it originates

8

What is a non-resident cell?

A cell that is transient between tissues

9

What is connective tissue made of?

Cells (fixed or mobile), fibers, and ground substance

10

How does connective tissue differ from epithelial cells?

Connective tissue does not have a basement membrane

11

Name fixed cells

Fibroblast, Macrophage, Mast cell, Percyte, Adipocyte, Mesenchymal cell

12

Name mobile cells

Macrophage, plasma cell, lymphocyte, polymorphonuclear cells (neutrophils), eosinophil, basophils

13

What does the bone marrow make?

multipotent stem cells that evolve in to immune cells (eosinophil, neutrophil, plasma, lymphocyte, macrophage, osteoclast, red blood cell)

14

What does the mesenchymal cell make?

embryonic connective tissues including osteoblasts, adipocytes, and fibrolbasts

15

Name typical peripheral blood cells

Erythrocyte, lymphocyte, neutrophil, eosinophil, basophil, monocyte, platelets

16

Describe a fibroblast

Produce collagen and elastin, oblong heterochromatic nucleus with no visible cytoplasm

17

What cell is a macrophage derived from?

Monocyte

18

What is the main function of macrophages?

Engulfing antigen and presenting the antigen for T cells. T cells are activated to either cytotoxic CD4 T cells or helper CD8 T cells

19

Where are dendritic cells found

Dendritic cells have tree-like structures and are found in the skin and epithelium.

20

What is the function of dendritic cells

Present antigen to stimulate B or T cells at lymph nodes. Dendritic cells have a euchromatic nuclei and large cytoplasm

21

Where are mast cells located

Connective tissue. Mast cells produce heparin and histamine

22

What is heparin

Anti coagulant

23

Describe mast cell

Red granulated cytoplasm with large, dark nucleus
Mast cells account for allergic responses and wound repair

24

What is a pericyte

Contractile cell located on the edge of vasculature. Dark nucleus with little cytoplasm

25

Describe the mononuclear phagocyte system

Bone marrow makes a pluripotential stem cell, which matures to a committed stem cell to monoblast to promonocyte to monocyte that is secreted to peripheral blood. Monocyte becomes macrophage

26

Describe a lymphocyte

Dark, round nucleus with no cytoplasm

27

Describe a plasma cell

A mixture of heterochromatin and euchromatin in the nucleus to give a spotted look, basophilic cytoplasm and large golgi apparatus

28

How are antibodies produced

B-cells digest the antigen and presents antigen on cell surface. B cell interacts with activated T cells, differentiates in to a plasma cell and begins producing antibodies

29

Name types of lymphocytes

CD4+ T cells, CD8 B cells, Helper T cells, Natural Killer T cells, regulatory T cells

30

Describe a neutrohpil

Multi-lobed with fine, eosinophilic granulated cytoplasm. Granules contain proteases and respond to infections and wounds by phagocytosis. Neutrophils can cause vasodilation and account for half of the white blood cells