muscle contraction

when skeletal muscle is fully contracted, the __ are closer to the thick filament

• H
• Z
• synaptic cleft
• sarcomere

the gap between the motor neuron and the muscle fiber it supplies at the neuromuscular junction

• H

• Z

• synaptic cleft

• sarcomere

tiny chains of contractile units between 2 Z disks, which are aligned end to end

• H
• Z
• synaptic cleft
• sarcomere

a neurotransmitter that stimulates skeletal muscles

• acetylcholine (Ach)
• ATP
• cross bridges
• neuromuscular junction

the only energy source that can be used to directly power muscle activity

• acetylcholine (Ach)
• ATP
• cross bridges
• neuromuscular junction

Tags

NGSS.HS-LS1-7

the heads of the myosin myofilaments are called __ when they link the thick and the thin filament together 

• acetylcholine (Ach)
• ATP
• cross bridges
• neuromuscular junction

point where an axon terminals of a nerve cell and the sarcolemma of a skeletal muscle join

• acetylcholine (Ach)
• ATP
• cross bridges
• neuromuscular junction

plasma membrane of a muscle cell

• sarcolemma
• sarcoplasmic reticulum
• thick filament
• thin filament

Tags

NGSS.MS-LS1-2

specialized smooth endoplasmic reticulum that surrounds each myofibril, it stores calcium and releases on demand

• sarcolemma
• sarcoplasmic reticulum
• thick filament
• thin filament

myosin protein

• sarcolemma
• sarcoplasmic reticulum
• thick filament
• thin filament

Tags

NGSS.HS-LS1-6