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45 Cards in this Set

  • Front
  • Back
Movement Classification:
Reflex- least complex, spinal cord/brain stem reflex

Voluntary- most complex, cerebral cortex; may become involuntary like reflexes

Rhythmic- combo of both
Basal Metabolic Rate is - ____
Energy used at rest to maintain living conditions measured under conditions of no digestion/ fasting; not expending energy to maintain temp.
Energy Balance:
BMR= ____%
Excercise/NEAT= ___%
Thermic Effects of Food= ___%
60% BMR
Exercise/NEAT 15-50%
Digesting Food/Thermic Effects 10-15%
____ modulates movement, learns movement, is part of motor control, inhibits unwanted movemnts, and allows wanted motor actions
Basal Ganglia
___ innervates muscle cells- controls muscle activity
Alpha Motor Neuron
____ executes correct movement
___ is involved in autonomic control centres, processing visual data from proprioceptors
Brain Stem
___ is the ablility to shorten or develop force
___ is ability to respond to a stimulus (ability to conduct AP)
___ is ability to stretch
___ is ability to go back to orriginal shap (recoil)
Last functional property of muscle is ___
Energy utilization and supply
One nerve and the muscle cells it innervates is ___
Motor Unit
The ___ property is for the contraction/ relaxation cycle
Elasticity Property
The ___ property is for stretching
____ surrounds entire muscle
____ surrounds each fasicle
____ surrounds each Myofibril
Alpha Motor neurons innervate ___ ,while Gamma Motor neurons innervate ___
Muscle Cells
Muscle Spindles
A large myelinated axon can conduct at ___m/sec
<___ for delicate precise work
>___ for powerful less precise contractions
<10 for precise
>100 for powerful
Stretch receptors are organized in ____ to muscle cells
Alpha Motor Neuron Propogates at ___ m/sec
Gamma Motor Neuron propogates at ___ m/sec
15-120m/sec for alpha
10-45m/sec for gamma
____ is the amount of force development/ the time to peak tension

____ is the period of time for muscles to come back to normal
Contraction Phase

Relaxation Phase
_____ stops the propogation of AP which is caused by acetylcholine
Acetylcholine Esterase- an enzyme at the endplate
Muscles shorten at most to ___% of original length
70% (they shorten 30%)
Actin is a ___ protein that binds ___
globular (6)

Troponin binds ____

Tropomyosin binds ___

True or False: Muscle proteins can only slide past each other
True - don't shorten they just slide past each other- myosin head pulls on actin filament
The fact that muscle fibres just shorten is called ____
Sliding Filament Model
The bi-directional propogation along the sarcolemma happens at __m/sec
True or False: If Ryanodine receptor stops working you cannot be paralyzed
False- stops working then paralyzed, stop breathing
___ is a Ca rlease channel
Ryanodine receptor
___ is present on the t-tubule and associates with ___ of the ____
DHP (Dihydropyridine) receptor
Ryanodine of the Sarcoplasmic Reticulum
True or False: The DHP receptor senses a increase in membrane polarity.
False- senses depolarization of membrane
___ states that under resting conditions there is no interaction of myosin with actin
Steric Hindrance Model
___ is the rate limiting step in the cross bridge cycle
Detachment of Myosin Head
___ is when you have no detachment of the myosin head
Myosin head acts as an ___
____ weakens binding b/w thick + thin filament and stops interaction
The Release of ADP and P causes ___
Myosin to Pull (Contraction)
____ binds to troponin to move _____ out of the way so ____ can interact with myosin
Ca, tropomyosin, actin
Four Features of Cross Bridge Cycle:
-Attachment/Detachment Cycle
-Powerstroke (Myosin pulls)
-Calcium switch
-Energy used in form of ATP
The amount of force developed depends on : ___ and ___
Force of an individual cycle and the numer of cross bridges working
True or False: If you stretch a muscle you increase overlap b/w actin and myosin and therfore decrease the number of Cross Bridges that can form, decreasing force
False- you decrease overlap (stretch)to decrease force
For muscles the max force development is at ___
resting length
Factors Influencing Force Development of Muscle:
-initial muscle length
-freq of stimulation
-fatigue(duration of activity)
-cell cross-section