Basic Tissues

Question 1

4 types of tissue

Answer 1

connective, epithelial, muscle, nervous

Question 2

what is connective tissues role

Answer 2

specialized to support, bind and protect organs

Question 3

4 types of connective tissue

Answer 3

fibrous, adipose, supportive, blood

Question 4

fibres found in connective tissue

Answer 4

 Collagen fibres: strong, high tensile strength, slight wavy appearance when not under tension (but not elastic)
 Elastic fibres: capacity to stretch and recoil

+ fibroblasts

Question 5

two subgroups (and succeeding 2 groups) of fibrous connective tissue

Answer 5

Loose CT (areolar, reticular)
Dense CT (dense regular, dense irregular)
-	Dense reg: fibres running in same direction, predictable forces (tendon + ligs) 
-	Dense irreg: dealing with range of unpredictable forces, e.g. dura mater

Question 6

two types of bone

Answer 6

compact + trabecular

Question 7

3 types of cartilage

Answer 7

Hyaline (few fibres), Elastic (elastic fibres), Fibrocartilage (many collagen fibres).

Question 8

functions of cartilage

Answer 8

scaffolding, support, protection, absorbs force

Question 9

function of epithelial cells

Answer 9

Function: Creates selective barrier b/w external environment and underlying tissue
Type for epithleia specialised for: absorption, secretory, protective or sensory activities

Question 10

function of muscle tissue

Answer 10

• Specialised contractile tissue

- Movement (body, organs, stability) + Heat generation

Question 11

types of muscle

Answer 11

skeletal, cardiac, smooth

Question 12

what makes the 3 types of muscle different

Answer 12

• Striations: transverse dark/light bands- regular arrangement/alternating of myofibrils - actin & myosin filaments) > skeletal + cardiac= striated, smooth has same contractile elements but no striations as actin + myosin arranged different and not in reg pattern
• Cell shape (cylindrical-skeletal), branching- cardiac, fusiform- smooth)
• Cell length (long vs short) (skeletal= long, cardiac + smooth= shorter)
  o Skeletal long as during development cells fuse= multiple nuclei
  • # of nuclei in a cell (one vs several) (skeletal= multiple nuclei)
  • Position of nuclei (peripheral vs central) (cardiac + smooth=central) skeletel= periphery of cell under membrane (so packed full of contractile units // nucleus gets pushed to side)
  • Intercalated discs (present vs absent) - only cardiac (specialised junctions that hold cells tightly together, channels allows rapid contraction + communication)

Question 13

function of nervous tissue

Answer 13

rapid transmission of coded information to other cells