Tissues And Extracellular Matrix

Question 1

What are the 4 different types of tissues

Answer 1

Nervous tissue, muscle tissue, epithelial tissue, connective tissue

Question 2

Contain specialized cells which rapidly transmit electrical impulses

Answer 2

Nervous tissue

Question 3

Long cells which are specialized for contraction and relaxation

Answer 3

Muscle tissue

Question 4

Layers of closely packed cells forming coverings on internal and external surfaces

Answer 4

Epithelial tissue

Question 5

What are the 3 functions of epithelial tissue

Answer 5

Covering, lining, protecting exposed surfaces, absorption, secretion

Question 6

Notable characteristics of epithelial tissue

Answer 6

• Cells are tightly packed together w little to no space in between
• Tissue always has a “free surface”
• Tissue is usually anchored to underlying CT via basement membrane.

Question 7

Basal Lamina (produced by the epithelial cells) + Reticular Lamina (produced by CT cells)

Answer 7

Basement membrane

Question 8

Lamina Lucida + Lamina dense=

Answer 8

Basal Lamina

Question 9

More Notable Characteristics of epithelial tissue

Answer 9

• Tissue has no direct blood supply

- Cells in lower layer are usually mitotic

Question 10

What are two types of epithelial tissues?

Answer 10

Membranous and glandular

Question 11

A loose arrangement of cells embedded within a support medium

Answer 11

Connective tissue

Question 12

What are the two functions of CT

Answer 12

• Provides support, structure, and protection

- Binds structure together

Question 13

Notable characteristics of Connective Tissue

Answer 13

-Composed of cells and supporting ‘extra cellular matrix’
-Cells usually spaced far apart, not direct contact
WELL VASCULARIZED!!

Connective Tissue

Question 14

Predominately associated with connective tissue but not exclusive to it

Answer 14

Extracellular matrix (ECM)

Question 15

What is ECM composed of

Answer 15

Fibers and ground substance

Question 16

Long fibers formed of the protein collagen

Answer 16

Collagen

Question 17

What are the three types of collagen

Answer 17

• Fibrillar collagen
• Network-forming collagen
• Linking/anchoring collagen

Question 18

Long, thick strands which are often visible with light microscope, most abundant is formed of TYPE I
Type II and III are also placed in category

Answer 18

Fibrillar collagens

Question 19

An interlaced network of ultra-thin strands exclusively TYPE IV (4)
Major structural component of Lamina dense component of basal Lamina

Answer 19

Network-forming collagens

Type IV (4)

Question 20

Short strands which connect Fibrillar collagen to eachother within extracellular matrix
TYPE VII 7 collagen, which anchors reticular Lamina to basal Lamina

Answer 20

Linking/anchoring collagens

Question 21

Very thin fibers formed predominantly of TYPE III collagen

Answer 21

Reticular fibers

Question 22

Form a flexible scaffolding within organs like the liver, spleen, lymph nodes, red bone marrow

Answer 22

Reticular fibers