Week 3 quiz

have more myoglobin aka more red blood cells

something like the bicep

aka high resistance to fatigue
muscle like the diaphram and the muscles that help with posture

high resistance to fatigue
low speed of shortenting
moderate specfic tension

high/moderate resistance to fatigue
high speed of shortenting
high specfic tension

low resistance to fatigue
highest speed of shortenting
high specfic tension

need more mitochondria

you can do that by sending AP down t tuble faster

then you can increase the number of mysion heads

affects SPEED of contraction
mysion enzyme that breaks down ATP and ATP hydrolysis is the rate determing step in muscle contraction

just measures the level of an enzyme so there is a lot of assumption that have to be made
darker: lower
Lighter: higher levels

aerobic
anaerobic

it is located in the mito and it is for aerobic
higher contraction of this leads to the capability for a lot of oxidative phosphorylation
dark color means more mito
light color means less mitochondria
GIVE INFO ON RESISTANCE TO FATIGUE (dark color more mito less fatigue)

is for anaerbic
it is involved in shuttleing a product for glycolysis
dark more glycolysis
light less glycolysis
GIVE INFO ON RESISTANCE TO FATIGUE (dark color more glycolysis more fatigue)

humans have 3
type 1 type 2a and type 2x
green-type 1
orange- type 2a
black-type 2x
gives us a count of how many there are of the diffeent types of fibers
if there are fibers inbettwen color then thos fibers are transitioning from one type to another

type 2 fibers higher specfic force then type 1
and you need to control size why? if you dont then the number of conractiole proerties (aka myosin and actin) directly affect force production

fast fibers (type 2) can take up 2-3 more volume then slow fibers (type1)
that exta volume is in having increased SR and T tubles allows for quicker initation of contraction
contractile units- similar in mass, shape, and filament spacing

low MATPase activity
high SDH activity
L/H aplha GP acitivity
high number of mito
low speed of shortening
moderstae specfic tension
aerobic prodom energy system
high reistance to fatigue
high efficiency
low Ca uptake into SR

high MATPase activity
high SDH activity
H aplha GP acitivity
high to moderate number of mito
high speed of shortening
high specfic tension
aerobic/ anaerobic prodom energy system
high/ moderate reistance to fatigue
moderate efficiency
high Ca uptake into SR

high MATPase activity
low SDH activity
H aplha GP acitivity
low number of mito
highest speed of shortening
high specfic tension
anaerobic prodom energy system
low reistance to fatigue
low efficiency
high Ca uptake into SR

the alpha motor neuron and all muscle fibers it innervates

can innervate a few fibers up to hundreds

number of muscle fibers innvervated by the motor neuron

measureed the relation between motor neuron electrical activity during streching
when tension increased so did the size of the the motor unit activaed
small MU contain slow fibers (type 1)
large MUs contain fast fibers (type 2)

immediate source can regenerate ATP quickly but have samll reserves
oxidative pathways have extensive reserves but take several seconds to mins to increase ATP production

ATP-CP anaerobic

glycolysis anaerobic

aerobic oxidative phosphorylation

creatine kinase reaction
maintains ATP levels
able to reform ATP from ADP as quickly as it is broken down
muscle stores of phosphocreatine
byproduct: creatine supplementation