Bioenergy Ai
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← Cross-Bridge and Shoulder

Charts 6-7 · 6-8 · 11 min

The cross-bridge

A read of this page, with the plate.

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Banner: the cross-bridge cycle — attach, stroke, ATP detaches, hydrolysis cocks
Banner. ATP binds to detach. Hydrolysis cocks. Kapel’s ATP blast forming the bridge runs Chart 1-1 backwards.CGI copy of her Draw · Atlas keeps the original.
Chart 6-7: thin filament with troponin and tropomyosin; thick filament myosin heads forming a cross-bridge toward the bare zone
Chart 6-7. When calcium strikes, troponin reveals the binding site. The site is G-actin, not ‘globin,’ not troponin.CGI copy of her Draw · Atlas keeps the original.
Chart 6-8: thick filament myosin, cross-bridges, Z-lines pulling toward the bare zone
Chart 6-8. The ratchet. Actin closes in because it is tied to the Z-line. ATP’s arrow is revised on this page — binding detaches, hydrolysis cocks. This hour’s cycle lab names it.CGI copy of her Draw · Atlas keeps the original.

Six actins around a myosin. Tropomyosin covers the sites until calcium. The head binds G-actin — her ‘globin’ is the globular actin, not a blood globin — and the stroke pulls the thin filament toward the bare zone. Z-lines come in. The muscle shortens. The ratchet is the hour.

The ATP arrow

Kapel: the head releases ATP and that blast forms the bridge. The cycle that stands: a cocked head (ADP and Pi on it) binds actin; Pi and ADP leave; the power stroke; new ATP binds and the head detaches; hydrolysis of that ATP cocks it again. No ATP, and the head stays stuck — rigor. Keep the arrow honest.

Her voice, from the class.

Cross-bridge & ratchet

Captions
Human teaching · audio · 0.9×

Calcium ratchet: actin/myosin + ATP

Captions
Human teaching · audio · 0.9×

Practice

Walk the lab: rest, calcium, attach, stroke, detach, cock. Say out loud: ATP binds to detach.

Check

ATP’s job at the head is:

  1. Binding detaches the head from actin; hydrolysis then cocks it for the next stroke ✓
  2. To blast the cross-bridge into being
  3. To land on troponin C

Detach, then cock. The source arrow ran backwards. Calcium is the switch.

The myosin head binds:

  1. G-actin — the globular binding site on the thin filament ✓
  2. The troponin site
  3. Germanium in the vesicle

Actin. Troponin is the switch. Germanium is influence at the knob.

The cross-bridge — keep this:

  1. A reason to skip permission
  2. The site is G-actin, not 'globin,' not troponin. ✓
  3. Collapsing two houses into one word

The site is G-actin, not 'globin,' not troponin.

This hour teaches that:

  1. Living against the tide on purpose
  2. Actin closes in because it is tied to the Z-line. ✓
  3. A name that captures the whole sky

Actin closes in because it is tied to the Z-line.

A true line on this hour:

  1. Treating every hour as interchangeable production
  2. ATP's arrow is revised on this page — binding detaches, hydrolysis cocks. ✓
  3. Skip permission and invent the next board

ATP's arrow is revised on this page — binding detaches, hydrolysis cocks.

Practice on this hour is to:

  1. A tourist empty-mind contest
  2. Walk the lab: rest, calcium, attach, stroke, detach, cock. ✓
  3. A bottle that finishes the feeling

Method before bottle. Trace what the lesson names.

Chart 6-7 on this hour is used as:

  1. A diagnosis stamp you must write today
  2. When calcium strikes, troponin reveals the binding site. The site is G-actin, not… ✓
  3. Thyroxine from the medulla

Translator map — Chart 6-7. Not a prescription pad.

The lab on this hour is for:

  1. A graded exam that invents the next curriculum
  2. Feeling and naming what the lesson maps — journal, not a bottle ✓
  3. A prescription pad for the lab name

Lab is literacy. Not a dose from the yield.

"The cross-bridge" here is best treated as:

  1. A tourist collection of special experiences
  2. Tropomyosin covers the sites until calcium. ✓
  3. A rigid diagnosis tool that replaces sleep

Train with the map. Do not invent a second sky.

A common mistake this hour corrects:

  1. Squeezing the gate until it 'opens'
  2. The head binds G-actin — her 'globin' is the globular actin, not a blood globin — and the… ✓
  3. Proof of supernatural status

The head binds G-actin — her 'globin' is the globular actin, not a blood globin — and the stroke…