1.3 Quiz so far

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

• synaptic cleft
• sarcolemma
• vesicle
• Ca²⁺ ion

A bundle of fascicles best describes a

• muscle fiber
• muscle tissue
• myofibril
• tendon

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 specialized part of the cell membrane of the muscle fiber identified as #5

• Sodium ion (Na⁺)

• Axon Terminal of Motor Neuron

• motor end plate

• Vesicle

The organelle containing actin and myosin identified as #9

• ACh
• Sarcolemma
• Vesicle
• Myofibril

Contractile unit of a muscle.

• sarcomere
• motor unit
• fascicle
• myofibril

Thick filaments are in a myofibril are

• ATPase
• Sarcoplasmic reticulum
• Actin
• Myosin

Thin filaments in a myofibril are

• Sarcomeres
• Sarcoplasm
• Actin
• Myosin

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

• sarcomere
• myofilament
• sarcolemma
• sarcoplasm