Chapter 10

(10 to 12 rev per min on amazon)

KNow the functions of a muscular tissue for a multiple choice question

sildes 1-22

  • epimysium is on the outside

  • fascicle- wraped in perimysium

  • each invidivual muscle tissue is wrapped in endomysium

  • fasicle has a bunch of muscle fibers wrapped inside- a muslce fiber is also a muscle cell.

  • wrap each of the muches and fasicle fibers in bundles so that we prevent the electacl charges from speaking to the mcusles we dont want contracting

indicuuals with musclar dystrophy the dystrohin isnt attacted and dosent go inside when it moves causing it to not be able to contract

actin and myosin- thick and thin fillaments

myofibrils- incease in size not number

Regulatory: Troponin, Tropomyosin- they are regulatory because the Ca binds to the troponin and allows the tropomyosin to move, but is Ca is not ther ethey block myosin and actin from moving

know all the charts

Muscle Metabolism 

37- 55

why do we need ATP- move the msyosin but it has to turn to adp through HYDROLYSIS; this process releases energy that is essential for the conformational changes in myosin, enabling it to detach from actin and reattach for another cycle of muscle contraction.

Anaerobic- no oxygyn, Aerobic- oxygen

creatine has to have happen before the other → creatine takes the phospahste that ATP took off for ADP → then the ADP takes it back to turn into ATP → his helps us to building more myofiberals 

*you need AD for a power stoke and for it to happen again you need the careatine process

Anaerobic glucolysis- takes 2 minutes to regenerate ATP

Aerobic Respiration- takes hours

FIX THESE

Muscle fatigue- know all

Build up of lactic acid and ADP causes muscle fatiuge- (reduces the PH of the muscle bc acid is positive charge, if you make a cell extra positive its harder for it to change charge and deporerize)

Insufficient release of ACh at NMJ- not enought acetocholine in the muscular junction

muslce tention

motor units- nueron and any of the muscle fibers it inneravtes,

motor unit recruitment- if you need more msucles to pick something heavier up you need to recruit more

Latent period- getting ready to have an anction potention (getting ready to deporarize)

contraction period- everything that happened in the master notes

relaxation- everything going back

refractory period- time where msucle or neuron is in rest and cant create antjoehr action potentia, like rest but you cant start anohter AP because your not finished the first one.

ex- you cant flip dominos until you pick them uo after the first time you flicked the,m

types of skeletal muscle fibers

three different types of fibers- geneticly pre dermemined

  • long distance- slow oxidative

  • mid distance- bottom one

  • short distance- middle one

  • oxidatyive- areobic

  • glycolytic- anareobic

Know the three fiber type charts**

how are they genetically predeterminded- sprinters- best sprinters are balck because they genetially have more fast flycolytic fibers because they were runinning long distance for food based on their terrain

soccer players are fast oxidative glycoysistic because they run a lot but thy also do fast sprints

steriods- caused you to build more muscle, the side effect negative- tostosterone levels go down and the male body parts shrivel up and get angrey more often.