Lab3 - CT

Question 1

What are the difference types of CT?

Answer 1

• CT proper
• Cartilage
• Bone
• Blood

*Most abundant tissue type

Question 2

What are some functions of CT?

Answer 2

• Connect body parts
• Support
• Protection
• Insulation
• Storage (ex: adipose cells)
• Transport (ex: blood vessels)

Question 3

How is CT classified?

Answer 3

Dense vs Loose (CT proper)
Regular (organized) vs irregular (unorganized)

Question 4

What is the extracellular membrane composed of?

Answer 4

ECM = Ground substance + fibers

Question 5

What are the components of CT?

Answer 5

1. Fibers:
   - Collagen
   - Reticular (Collagen Type III)
   - Elastin
2. Cells:
   - Fibrocytes/fibroblasts
   - Adipose cells
   - Macrophages
   - Immunologic cells
3. Ground substance:
   - Glycoproteins → fibronectin and laminin
   - Proteoglycans → dermatan sulfate, chondroitin sulfate, keratan sulfate, and heparan sulfate

Question 6

What are glycoproteins?
What are proteoglycans?

Answer 6

Glycoproteins → oligosaccharides linked to proteins at the level of their side chains
(Less than in proteoglycans)

Proteoglycans → 1 core protein bound to multiple glycosaminoglycans (GAGs)
- GAG= repeating subunits of disaccharide units that are negatively charged (ex: hyaluronate) → many GAGs can form chains

Question 7

What the the only forms of dense regular CT?

Answer 7

Tendons and Ligaments

Question 8

What are the different CT in the dermis?

Answer 8

Papillary layer:
- Adjacent (deep) to the epidermis (more apical than reticular)
Highly vascularized and innervated
- Collagen type I
→ Looser Irregular CT

Reticular layer:
- More fibrous than the papillary layer
- Collagen type I
→ Dense irregular CT

Question 9

What connective tissue is found in the hypodermis?

Answer 9

→ Specialized type of loose CT
→ Made of adipose cells

Question 10

What are the different classifications of cartilage?

Answer 10

• Elastic (ears)
• Hyaline (trachea)
• Articular (long bones)

Question 11

What are the properties of cartilage?

Answer 11

• Collagen type II
• Avascular
• Hyaline cartilage is basophilic
• Covered by a perichondrium → dense irregular CT

Question 12

What are the 2 possible type of growths for cartilage?

Answer 12

• Appositional
• Interstitial

Question 13

What is particular to articular cartilage?

Answer 13

It lacks a pericondrium

Question 14

What is an isogenic group?

Answer 14

An isogenic group is a cluster of up to eight chondrocytes found in cartilage.