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30 Cards in this Set

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  • Back
____ is the rate at which the myosin heads pull the thin filament.
Velocity of Shortening (rate of attachment + detachment-cross bridge cycle)
Velocity Depends on:
Type of Myosin and Load
In Mitochondrial Oxidative Phosphorylation ____ are used to make ATP and ____ is produced in the process
02, glucose, fatty acids, pyruvic acids, amino acids (rare/drastic condition) are produced

C02 and H20 are produced
____ is used to make creatine phosphate from creatine
Creatine Kinase
Muscles are predominantly __ white (___) and ____ red (___)
1/3 anaerobic(white)

2/3 aerobic (red)
True or False: Large motor units are relatively excitable?
False- relatively in excitable
True or False: Large Motor units don't conduct APs well because they used FG energy system.
False: don't conduct AP well and use FG but no correlation b/w two
True or False: Large Motor unites can only be recruited in forceful contractions.
True or False: Small Motor units are relatively inexcitatble?
True or False: Small Motor units have a fast conducting axon and therfore conduct AP well.
True or False: Small Motor units only use SO energy system?
True or False: Small Motor units are recruited first but are not acive in forceful contractions?
False- recruited first but frequently active
___ is when small motor units are recruited first, and if that is not enough, there is progressive move to larger motor units.
Ordered Pattern of MU Recruitment
____ is a change in muscle capacity/ability upon usage
True or False: The disturbance of K and Cl ions across the plasma membrane is the only causes of fatigue.
False: Both the disturbance of K and Cl ions and build up of acid in muscles causes fatigue
True or False: You can change From FG to FGO, but not SO to FGO or FG
True-only FG to FGO transition is possible
True or False: In SO, Myosin actin ATPase is high.
False- ATPase is low
True or False: The SO system is rich in myoglobin and glycogen.
False: Rich in Myoglobin but not gylcogen
True or False: Spinal Cord Injuries alter contractile abilities so that the muscle will revert to neonatal FG energy system.
____ is the degenerative loss of muscle mass.
____ is muscle loss in response to an already existing disease, such as cancer.
GH-IGF1 is a ___ hormone
___ influence glucose metabolism
____ is a ____ hormone that inhibits muscle growth.
Myostatin, catabolic
True or False: It is possible that a muscle isn't attached to bones on both ends.
True: Rings are unattached to bones, Tonge and Eye are attached to bone on one end
True or False: Type 1 Levers are like a see-saw, but they are uncommon and do not favor force or speed.
False: Are See-saw, uncommon, but can favor force or speed depending on position of fulcrum
Type 2 Levers are like a ____ and they lift ____ (amount of weight) but ___ (height) and are ____ (fast or not)
Wheelbarrow, Great weight, Don't lift High, and aren't very fast
True or False: If you shorten muscle less than 30% you could lift more but with less range of motion.
True or False: Type 3 Levers are most common, they favor speed and range of motion, but are limited in weight lifting (greater effort)
For Type 3 Levers: The Force Ratio is ____ and the Lever Ratio is ____
Force 35kgforce : 5cm height
Lever 1cm shortened:7cm heigt