9. Muscle Relaxation Pathway

What enzyme degrades ACh during relaxation step 1?

Acetylcholinesterase

What is the common abbreviation for acetylcholinesterase?

AChE

What happens to ligand-gated sodium channels in relaxation step 1?

Channels close

What channels open during relaxation step 2?

Voltage-gated potassium channels

Which ion exits the cell during relaxation step 2?

Potassium

What electrical process occurs when potassium exits in relaxation step 2?

Repolarization

What happens to voltage-gated calcium channels in relaxation step 3?

Channels close

What mechanism moves calcium in relaxation step 4?

Calcium pump

Where is calcium pumped back to in relaxation step 4?

Sarcoplasmic reticulum

What structure shifts during relaxation step 5?

Troponin-tropomyosin complex

What functional sites are blocked during relaxation step 5?

Active sites