CH 4: Tissues

Question 1

High levels of tissue organization can form an organ. Whats the order?

Answer 1

Cell >Tissue > organ > organ system > organism

Question 2

4 primary tissue types

Answer 2

-Epithelial
-Connective
-Muscle
-Nervous

Question 3

Classified according to cell shape

Answer 3

-Squamous epithelium
-Cuboidal epithelium
-Columnar epithelium

Question 4

Also classified by the number of cell layers

Answer 4

Simple:
-has only 1 cell layer
-Thin layer

Stratified:
-has multiple layers
-Provides protection

Question 5

How are these cells held together?

Answer 5

-Basement membrane

-Non-cellular layer directly beneath epithelial tissue

-Attaches epithelial cells to underlying tissues

-Provides structural support

Question 6

How are these cells held together (using cell junctions)

Answer 6

Tight junctions: seal plasma membranes of adjacent cells so tightly together nothing can pass between the cells

Adhesion junctions :looser in structure, allows for some movement between cells

Gap Junctions: permits the movement of ions or water between two adjacent cells

Question 7

3 main elements to providing strength for Fibrous

Answer 7

Collagen fibers: made of proteins
-stretches and kind of flexible

Elastic fibers: made up of elastin
-Stretch without breaking

Reticular fibers: -interconnect with each other

Question 8

Four special types of CT

Answer 8

-Cartilage
-Bone
-Blood
-Adipose

Question 9

3 types of muscle tissue

Answer 9

-Skeletal muscle:
Connects to tendons which attach to bones
-many nuclei

Cardiac Muscle:
Heart muscle

-Involuntary, single nucleus

Smooth Muscle:
Surrounds hollow organs, constricts and dilates
-single nucleus

Question 10

Surrounds, protects, and supports neurons
(nervous tissue)

Answer 10

Glial cells

Question 11

Structural parts in nervous tissue

Answer 11

-Cell body
-Dendrites
-axon