muscle quiz

C is pointing to?

• H zone
• Z disk
• actin
• I band

F is pointing to?

• H zone
• Actin
• A band
• 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

Which of the following occur when ATP binds to the myosin head?

• Myosin head change to low energy configuration

• Myosin head undergoes power stroke

• Myosin head detach from actin

• Myosin head forms cross bridge

What are regulatory proteins found on actin that control muscle contraction? (Choose two)

• Sarcoplasmic reticulum

• Actin

• Troponin

• Myosin

• Tropomyosin

Ca2+ will be released from the sarcoplasmic reticulum when

• impulse reaches neuromuscular junction

• impulse transmitted along T tubule

• ATP binds to sarcoplasmic reticulum

• acetyl choline binds to ligand gated ion channels

Ca2+ released by sarcoplasmic reticulum will bind to

• Actin

• Troponin

• Myosin

• Tropomyosin