Neuromuscular Junction & Sliding-Filament Theory

Region where a motor neuron comes in close contact with a muscle cell.

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction

The gap between a neuron and a muscle cell: (#4 in the diagram)

• synaptic cleft
• sarcolemma
• vesicle
• Ca²⁺ ion

Tags

NGSS.MS-LS1-3

The neurotransmitter stored in the axon terminal identified as #3

• Acetylcholine
• Protein Channel
• Calcium Ion (Ca²⁺)
• Syanptic Cleft

The organelle that stores ACh in the axon is identified as #4

• Motor Neuron
• Axon Terminal of Motor Neuron
• Sarcolemma
•  Vesicle

The organelle containing actin and myosin identified as #9

• ACh
• Sarcolemma
• Vesicle
• Myofibril

Contractile unit of a muscle which is also the functional unit of a muscle is ...

• sarcomere

• motor unit

• fascicle

• myofibril

The plasma membrane of a skeletal muscle cell is called the:

• sarcomere
• myofilament
• sarcolemma
• sarcoplasm

The organelle that contains actin and myosin.

• Tendon
• myofilament
• myofibril
• Fiber

Thick filaments are in a myofibril are

• ATPase
• Sarcoplasmic reticulum
• Actin
• Myosin

Thin filaments in a myofibril are

• Sarcomeres
• Sarcoplasm
• Actin
• Myosin