Connective tissue

Question 1

Fibroblast

Answer 1

Most numerous cell in CT
swollen, larger, actively secreting fibres
Fibrocyte: inactive
Fusiform with elongated nuclei
Synthesis CT fibres (collagen, reticular and elastic)

Question 2

Reticular cell

Answer 2

Specialized fibroblast
Synthesis of collagen fibres that offer scaffolding to parenchyma in various organs, scaffolding for lymphocytes to move along in the spleen and lymph nodes

Question 3

Adipocytes

Answer 3

Cells specialized for depositing lipids
Unilocular (white) or Multilocular (brown) within the CT
Sudan red stains lipid red

Question 4

Macrophages

Answer 4

Was a monocyte until it excited blood, and become a macrophage in CT
Patrols for foreign substances (phagocytosis)
*** often times dif names, depending on the which tissue they’re in

Question 5

White blood cell

Answer 5

TRANSIENT
appear during inflammation and allergic reaction
Neutrophil, eosinophil, basophil, lymphocyte

Question 6

Mast cells

Answer 6

Filled with basophilic granules that contain histamine and heparin
involved in inflammation and allergic reactions (increase blood flow and WBC circulation)

Question 7

Collagen fibers

Answer 7

Most numerous of the CT fibres

Composed of fibrils; can be the length appear white in large numbers (think tendon)

High tensile strength - little to no stretch

Manufactures as procollagen in fibroblasts - joint to in collagen fibrils to make collagen fiber - this requires vitamin C

Question 8

Elastic Fibers

Answer 8

Individual, branching and anastomosing fibres
found around collagen fibres - meant to stretch
Resorcin fuchsin
Orcein

Found in higher amounts in the aorta, elastic arteries, lungs, vocal cords, dermis

Question 8

Reticular fibers

Answer 8

Type III collagen
Stained with silver stain
Produced by reticular cells

Question 9

Ground substance

Answer 9

a combination of macromolecules that are designed to hold interstitial fluid and the interstitial fluid itself

Question 10

Loose Areolar

Answer 10

Loosely irregular arranged fibres, typically with space around the cells (more cells, few fibers, clear space)

Question 11

Dense Regular

Answer 11

Uniform, parallel, densely packed fibers, little space around them
White
Tendons, ligaments and cornea

Question 12

Answer 12

Resorcin fuchsin

Question 13

Answer 13

Orcein

Question 14

Dense irregular CT

Answer 14

Fewer cells, many thick collagen fibres
Irregularly packed

Question 15

Reticular CT

Answer 15

Network of fine collagen fibrils = reticular fibers
offers support for cells
Synthesized by reticular cell; form the stroma in lymph nodes

Question 16

Adipose CT

Answer 16

Functions of energy storage, protection and insulation
Also has an endocrine role; adipocytes produce leptin which regulates body fat (satiation)

Question 17

Where can you find CT

Answer 17

is found in the deep epidermis

Question 18

Where is CT derived from

Answer 18

Mesoderm

Question 19

Main characteristics of CT

Answer 19

Little cells, loosely embedded in complex ECM - nutrients the epithelium

Highly vascualized and innervated
Lack polarity

Question 20

Functions of the CT

Answer 20

Connect other tissues
Gives form
Physical support of body
Thermoregulation
Nutrition and storage
Defence mechanism

Question 21

Stroma

Answer 21

the Ct used to subdivide parenchyma

Question 22

parenchyma

Answer 22

the collection of adenomeres and duct systems of a compound gland

Question 23

Mesenchyme

Answer 23

Embryonic differentiated connective tissue

Question 24

Unilocular

Answer 24

One large vacuole within a cell; one lipid droplet

Question 25

Multiocular

Answer 25

Multiple smaller vacuoles within a cell; several lipid droplets