Lecture 2

Question 1

tissue =

Answer 1

group of cells which perform a specific function

Question 2

4 basic types of tissue

Answer 2

1. epithelium - cellular sheet - protection
2. connective - fibrous - support
3. muscle - proteins - movement
4. neural - electrically conductive - pathway of connections

Question 3

4 main functions of epithelia sheets

Answer 3

1. protection - ex. skin - barriers
2. absorption - ex. intestines - bring things in
3. secretion - ex. glands - product needs to be pushed somewhere to be absorbed - NEED
4. excretion - ex. kidney - everything you get rid of - DONT NEED

Question 4

5 main characteristics of epithelial tissues

Answer 4

1. cellular
2. polarity - different places
3. basement membrane
4. avascular - “without” - diffusion
5. regeneration - when one dies, another comes

Question 5

what does the mucous membrane do

Answer 5

it lines cavities and surfaces that are exposed to the external environment and keeps them MOIST

examples: GI, respiratory, UG

external environment -> internal tube -> body is internal environment

the body is basically a DONUT

Question 6

what does the serous membrane do

Answer 6

covers organs and lines body cavities & produces a lubricant to aid the organs as they move

example: pleural, peritoneal, pericardial cavities

characteristics: shrink wrapped and one cell layer thick

Question 7

what does the synovial membrane do

Answer 7

lines joint cavities and provides for exchange of fluids and solutes between the joint cavity & adjacent tissues

examples: it’s engine oil, without the oil, the engine burns up

responsible for getting nutrients to other places

Question 8

what does the cutaneous “membrane” do

Answer 8

ITS SKIN

covers the body

characteristics: thick, relatively waterproof, abrasion resistant