Exam 1 Part 3

Question 1

Organs

Answer 1

aggregate of 2+ tissue types performing a specific function

Question 2

System

Answer 2

aggregate of 2 or more organs performing a specific function

Question 3

Organism

Answer 3

whole of the organ systems

Question 4

Matrix

Answer 4

non-living, intercellular + extracelluar secreted by cells

Question 5

Matrix can be

Answer 5

sold
semi-solid
liquid
fibrous

Question 6

Categories of tissues

Answer 6

epithelial
connective
muscle
nervous

Question 7

Differentiation

Answer 7

specialization of cells; genetic control

Once happens, cells usually cannot divide or change

Question 8

Stem cells

Answer 8

cells not yet completely differentiated

can divide and become any type of cell

Question 9

Epithelial tissue

Answer 9

covers surface and lines cavities

little matrix

Question 10

Epithelial tissue functions

Answer 10

protection
absorption
filtration
diffusion
Regenerative
secretion
sensation

Question 11

basement membrane

Answer 11

sheet-like barrier of extracellular material b/t ET and underlying CT - attaches 2 layers produced by both

Question 12

intercellular junctions

Answer 12

tight
gap
desmosomes

Question 13

tight junction

Answer 13

complete attachment bt cells -forms fused band around cells

-keeps things from passing across (digestive)

Question 14

Desmosome

Answer 14

spot attachment -gives some connectiveness (skin)

Question 15

Desmos

Answer 15

bond

Question 16

gap junction

Answer 16

passageway for small particles to pass bt cells (cell membrane) nerve impulses

Question 17

simple squamous ET

Answer 17

single layer, flattened, irregularly shaped, fragile

Question 18

simple squamous ET function

Answer 18

diffusion
line blood vessels, heart chambers (endothelium)
line body cavities and organs (mesothelium)

Question 19

Simple cuboidal ET

Answer 19

lines small ducts/tubes having secretory functions; may also be exretory or absorptive
–follicles of thyroid

Question 20

Simple columnar ET

Answer 20

(protection), secretion, absorptive
digestive and repsiartory tract; portions of female reproductive system
may be associated with goblet cells (glands)
Secrete mucus
May have projections

Question 21

Cilia

Answer 21

cell extentions
beat to move materials over surface
Usually on simple columnar ET

Question 22

Microvilli

Answer 22

form brush border

villus- hair

Question 23

Stratified epithelium

Answer 23

layers
worn away, replaced by mitosis in deepest layers
classifity by surface cell shape

Question 24

Startified squamous ET

Answer 24

variable layers

2 types

Question 25

Stratified squamous ET types

Answer 25

keratinized

nonkeratinized