slides #5

Question 1

what makes up connective tissue

Answer 1

collagen, elastin, reticulin, ground substance

Question 2

what determines the mobility of the musculoskeletal system

Answer 2

connective tissue

Question 3

collagen tissue

Answer 3

high tensil strength

Question 4

elastin

Answer 4

gives tissue extensibility

Question 5

reticulin

Answer 5

type III that are only during healing process

Question 6

ground substance

Answer 6

reduces friction, prevents cross linking, maintains spacing, provides nutrients

Question 7

areolar tissue

Answer 7

loose, unorganized

skin and fascia

Question 8

dense tissue

Answer 8

highly organized with short spacing
high tensile strength
ligaments and tendons

Question 9

how do we lose motion

Answer 9

increase collagen cross linking
loss of ground substance
fibrosis
wound contraction
collagen misalignment

Question 10

immobilized muscle

Answer 10

lactic acid level increases

oxidative capacity decreases because of metabolism

Question 11

when does atrophy set in

Answer 11

within 2 weeks

Question 12

what can immobilization cause

Answer 12

reduced protoglycan concentration, matrix organization, necrosis of constant pressure areas, increased fibrofatty issue (scar tissue)

Question 13

elasticity

Answer 13

stores potential energy

able to stretch and return to previous length

Question 14

viscoelasticity

Answer 14

loses energy thru heat

fluid like, doesn’t return

Question 15

plasticity

Answer 15

permenant change
no elastic
over plastic is derformation

Question 16

force deformation

Answer 16

amount of force needed to maintain change in length or deformation

Question 17

creep

Answer 17

elongation of tissue when stress is at low level over long period of time
increases with temp increase

Question 18

creep can cause what

Answer 18

fatigue failure or endurance limit

Question 19

hookes law

Answer 19

strain of an object is directly related to ability to resist stress

Question 20

how does collagen fail

Answer 20

force relaxation repsonse doesn’t work

creep too fast

Question 21

hysteresis

Answer 21

repetitive stretching at a submax load can increase tissue length
viscous properties convert force into heat allowing easier stretching

Question 22

what principle does pnf use

Answer 22

hysteresis

Question 23

nuclear bag fiber

Answer 23

2 or 3 nuclei beside each other

more sensitive to velocity of stretch due to increased elasticity

Question 24

nuclear chain fiber

Answer 24

shorter and thinner

sensitve to stretch only