systemib

Question 1

large myelinated schwann cell 20 um conduction velocity

Answer 1

130 m/aec

Question 2

small myelinated schwann cell .5um conduction velocity

Answer 2

.5 m/sec

Question 3

detects linear acceleration and head tilts in horizontal plane

Answer 3

utricle

Question 4

etects linear acceleration and head tilts in vertical plane

Answer 4

saccule

Question 5

fundamental contractile unit of striated muscle

Answer 5

sarcomere

Question 6

light band

Answer 6

actin filament
I band - isotropic band
has Z disc

Question 7

dark band

Answer 7

myosin filament
A band An isotropic band
has H line - light line

Question 8

3 types of protein of actin

Answer 8

actin
tropomyosin
troponin - strong affinity to calcium

Question 9

myosin 3 types of proteins

Answer 9

heavy chain - 2 (tail)
light chain (4) head
Arm - form the cross bridges

Question 10

fast twitch fiber

fast glycolytic fibers are called

Answer 10

type II B fibers

type II A - fast oxidative

Question 11

type of muscle contractions muscle does not shorten during contraction

Answer 11

isometric - sitting standing and posture

• isotonic - mm thus retention with tension
  
  • concentric - mm shorting w/o movement
  • eccentric - mm lengthening + mvement

Question 12

refers to progressive increase in magnitude of twitch

due to progressive increase in cytoplasmic Ca ++

Answer 12

treppe / stair case effect

Question 13

type of motor unit composed of discrete fibers each contracts independently
- innervated by single nerve ending
-

Answer 13

multi unit smooth mm

Question 14

whole fiber contract together as single unit

- fibers aggregated into sheets or bundles

Answer 14

unitary
syncitial smooth muscle
visceral smooth mm

Question 15

type of mm which
sarcomere are absent
has no troponin
t tubules are absent
few myosin more actin

Answer 15

smooth muscle

Question 16

condition in which the mm maintains high levels of active dorce with out rapid CB

Answer 16

latch mecahnism