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Introductory Human Physiology > Tension and metabolism,fuels > Flashcards

Tension and metabolism,fuels Flashcards

1
Q

What is Twitch?

A

Result of single AP

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2
Q

What is tetanus?

A

Maximal contraction sustained

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3
Q

How changes velocity of shortening depending of load?

A

As increase in load, velocity gets less

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4
Q

What is the result of AP?

A

Increase in calcium in cytosol, almost maximal

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5
Q

What is isotonic shortening?

A

Tension produced greater than load

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6
Q

What is isometric contraction?

A

When maximal load is reached , no longer can shorten muscle, but can hold

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7
Q

What is lenghtening contraction?

A

Tension less than load, contracting but muscles getting longer

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8
Q

Name metabolism fuels

A

ATP,creatine phosphate

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9
Q

What is fatique stare?

A

Way of protecting muscles frome damage.

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10
Q

What are the factors contributing to fatique stare?

A
  • lots of AP firing - increase in K+ outside cell - result persistent depolarization - no another AP
  • build up of metabolits which impair SR Ca+ ATPase , troponin tropomyosin complex
  • build up of inorganic phosphate reduces ability to contract quickly
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11
Q

Aerobic metabolism

A

Oxydation to CO2 and h2O, required oxygen

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12
Q

Anaerobic metabolism

A

Converting glucose to lacid acid prodcuing ATP, glycolisis glucose and glycogen

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13
Q

Tyle of myosin

A

ATPase słów and fast

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14
Q

Predominant metabolic pathway used to form ATP

A

Glycolitic, oxidative, oxidative-glycolitic

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15
Q

Slow oxidative fibers

A

Slow ATPase, muscles for posture, contraction all day, not lots of force

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16
Q

Fast-oxidative-glycolitic fibers

A

Oxidative or and glycolitic metabolism, faster ATPase, fatigue, walking, medium ability to resist fatigue

17
Q

Fast glycolitic fibers

A

Fast ATPase, a lot of force quickly, jumping

18
Q

What order are fibers recruited?

A

First slow oxidative, fast-oxidative-glycolitic,last fast glycolitic

19
Q

What are two main ways to increase tension?

A

Send many AP to produce maximal force tentanus, increase number of motor units

Introductory Human Physiology (4 decks)

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