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Motor Physiology Flashcards

1
Q

Type II muscles
Fast twitch
WHITE muscle
Fast Glycolitic muscles

A
  • Larger size
  • Faster SR Calcium Reuptake
  • Glycolitic
  • Active phosphagen and glycogen-lactic acid energy system
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2
Q

Type II muscles
Fast twitch
WHITE muscle
Fast Glycolitic muscles

A
  • Anaerobic
  • High myosin ATPase
  • Less Mitochondria, Myoglobin, capillaries
  • Fast contraction velocity, Short duration
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3
Q

Type II muscles
Fast twitch
WHITE muscle
Fast Glycolitic muscles

A

EOMs

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4
Q

Type II muscles

A
  • Fast twitch
  • WHITE muscle
  • Fast Glycolitic muscles
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5
Q

Type I muscles

A
  • Slow twitch
  • RED muscle
  • Slow Aerobic muscles
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6
Q

Type I muscles
Slow twitch
RED muscle
Slow Aerobic muscles

A
  • Smaller size
  • Slower SR Calcium Reuptake
  • OXIDATIVE
  • LESS Active phosphagen and glycogen-lactic acid energy system
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7
Q

Type I muscles
Slow twitch
RED muscle
Slow Aerobic muscles

A
  • Aerobic
  • Low myosin ATPase
  • MORE Mitochondria, Myoglobin, capillaries
  • Moderate contraction velocity, Prolonged duration
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8
Q

Multi-Unit smooth muscles

A
  • Multiple muscles ACT ON THEIR OWN
  • Nerve signal control
  • NO gap junctions
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9
Q

Multi-Unit smooth muscles

A
  • NO Action Potential, Junctional Potential only
  • NO spontaneous contraction
  • Arrector pili muscle, ciliary muscles, vas deferens
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10
Q

Unitary smooth muscle

Syncitial/Visceral smooth muscle

A
  • Multiple muscles ACT TOGETHER AS ONE
  • Nerve signal, HORMONAL, STRETCH, LOCAL FACTOR control
  • HAS Gap junctions
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11
Q

Unitary smooth muscle

Syncitial/Visceral smooth muscle

A
  • Slow waves, Spike potentials plateau potentials
  • Exhibit spontaneous contraction
  • Visceral Organs
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12
Q

Tethers Myosin to Z line

A

Titin

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13
Q

Scaffolding of Myosin to Z line

A

Titin

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14
Q

Binds Z line to M line

A

Titin

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15
Q

Stabilizes sarcolemma and prevents contraction induced rupture

A

Dystrophin

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16
Q

Binds ACTIN to Z line

A

Actinin, CAPZ Protein

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17
Q

Binds Z Line to Sarcolemma

A

Desmin

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18
Q

Sets length of actin during assembly

Molecular ruler

19
Q

Z disk-Intermediate filament proteins

A
  • Skeletal - desmin
  • Cardiac - desmin
  • Smooth - desmin or VIMENTIN in Vascular Smooth Muscles
20
Q

Largest protein in the body

21
Q

Most abundant protein in the body

22
Q

Maintains length of Thin filaments

A

Nebulin, Tropomodulin

23
Q

Sarcoplasmic Reticulum

A
  • T tubule receptors - Dihydropyridine receptor
  • Cisterns receptor - Ryanodin
  • Sequesters calcium - Calsequestrin
24
Q

Distance achieves in each cross bridge cycle

A

10 nanometers

25
Size Priciple
Small units recruited first before big motor units
26
Multiple fiber summation
Spatial summation
27
Frequency summation
Temporal summation
28
Treppe/ Staircase Effect
* Each contraction occurs AFTER complete relaxation production STRONGER contraction at each time * Due to Ca accumulation, pH changes, INC temp
29
Complete fusion of individual muscle contraction when Ca+ is all used up
Tetany
30
Tension developed when muscle is stretched
Passive tension
31
Tension developed when muscle is contracted
Active tension
32
Represents NUMBER of cross bridges that cycle in muscle contraction
Active Tension
33
Represents speed of cross bridge cycling in muscle contraction
Velocity of contraction
34
Isometric contraction
* LENGTH is held constant * NO muscle shortening/lenghtening * eg Pushing against the wall
35
Isotoni contraction
* LOAD is constant * Concentric contraction - muscle shortens * Eccentric contraction - muscle lenghtens
36
Smooth muscle components for contraction
* MLCK * Calmodulin * Caldesmon, Calponin - phosphorylated by Ca-calmodulin complex
37
Rudimentary T tubules of smooth muscles
Caveoli
38
Smooth muscle contraction
* Lesser ATP used * Slower Onset of contraction * LONGER duration of Contraction * STRONGER force of contraction
39
Skeletal muscle contraction
* More ATP used * Faster Onset of contraction * SHORTER duration of Contraction * WEAKER force of contraction
40
Renshaw cells
* Synapse with a pool of motor neurons by which they are stimulated * INHIBITORY * Facilitate LATERAL INHIBITION
41
Muscle Spindles
* Arranged in PARALLEL MANNER to extrafusal fibers | * Detects MUSCLE LENGTH and CHANGES IN MUSCLE LENGTH
42
Golgi Tendon
* Arranged in SERIES MANNER | * detecs Muscle TENSION
43
Type I muscles Slow twitch RED muscle Slow Aerobic muscles
Soleus, Anti gravity muscles of the back

Physiology (6 decks)

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