b34 module 8 MUSCLES

Question 1

describe long sarcomeres in terms of shortening speed and relative force, this is in invertebrates

Answer 1

long sarcomeres

slower speed, slower shortening

but more force

Question 2

describe short sarcomeres in terms of shortening speed and relative force, but this is in invertebrates

Answer 2

short sarcomeres

faster speed, faster shortening

but less force

Question 3

what two bands/zones shorten during muscle contraction

Answer 3

I band and H zone

Question 4

three major components of muscle cells (besides plasma)

Answer 4

myofibrils

sarcoplasmic reticulum

mitochondria

Question 5

membrane potential increases

Answer 5

depolarization

Question 6

series elastic components fully stretches
Time enough for full tension development

Answer 6

tetanus

Question 7

stretchable components in line with sarcomeres (ex. Protein in sarcomere itself, tendons, connective tissue)

Answer 7

series elastic component

Question 8

stretchable parts of muscle along side sarcomere (ex. Myofiber plasma membrane)

Answer 8

parallel elastic component

Question 9

what twitch fibers are used for things such as walking and slow things but for longer, sustained periods of time

Answer 9

Red Twitch Fibers (Slow-Twitch or Type I)

Question 10

what fibers are used quick, to dash, sprint but not for long periods of time

Answer 10

White Twitch Fibers (Fast-Twitch or Type II)

Question 12

twitch fibers are also called

Answer 12

phasic fibers