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Physiology > Motor Physiology > Flashcards

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

A

Nebulin

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

A

Titin

21
Q

Most abundant protein in the body

A

Collagen

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
Q

Size Priciple

A

Small units recruited first before big motor units

26
Q

Multiple fiber summation

A

Spatial summation

27
Q

Frequency summation

A

Temporal summation

28
Q

Treppe/ Staircase Effect

A
  • Each contraction occurs AFTER complete relaxation production STRONGER contraction at each time
  • Due to Ca accumulation, pH changes, INC temp
29
Q

Complete fusion of individual muscle contraction when Ca+ is all used up

A

Tetany

30
Q

Tension developed when muscle is stretched

A

Passive tension

31
Q

Tension developed when muscle is contracted

A

Active tension

32
Q

Represents NUMBER of cross bridges that cycle in muscle contraction

A

Active Tension

33
Q

Represents speed of cross bridge cycling in muscle contraction

A

Velocity of contraction

34
Q

Isometric contraction

A
  • LENGTH is held constant
  • NO muscle shortening/lenghtening
  • eg Pushing against the wall
35
Q

Isotoni contraction

A
  • LOAD is constant
  • Concentric contraction - muscle shortens
  • Eccentric contraction - muscle lenghtens
36
Q

Smooth muscle components for contraction

A
  • MLCK
  • Calmodulin
  • Caldesmon, Calponin - phosphorylated by Ca-calmodulin complex
37
Q

Rudimentary T tubules of smooth muscles

A

Caveoli

38
Q

Smooth muscle contraction

A
  • Lesser ATP used
  • Slower Onset of contraction
  • LONGER duration of Contraction
  • STRONGER force of contraction
39
Q

Skeletal muscle contraction

A
  • More ATP used
  • Faster Onset of contraction
  • SHORTER duration of Contraction
  • WEAKER force of contraction
40
Q

Renshaw cells

A
  • Synapse with a pool of motor neurons by which they are stimulated
  • INHIBITORY
  • Facilitate LATERAL INHIBITION
41
Q

Muscle Spindles

A
  • Arranged in PARALLEL MANNER to extrafusal fibers

* Detects MUSCLE LENGTH and CHANGES IN MUSCLE LENGTH

42
Q

Golgi Tendon

A
  • Arranged in SERIES MANNER

* detecs Muscle TENSION

43
Q

Type I muscles
Slow twitch
RED muscle
Slow Aerobic muscles

A

Soleus, Anti gravity muscles of the back

Physiology (6 decks)

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