Unit 3 Lecture 2 Neuromuscular Junction

The point at which the nerve cell reaches the sarcolemma of the muscle fiber is the _____.

• Neurotransmitter

• Acetylcholine

• Synaptic cleft

• Neuromuscular Junction

The gap between the nerve cell and sarcolemma is the ____ ___.

• Synaptic cleft

• Neurotransmitter

• Motor unit

• Neuromuscular junction

What is the specific neurotransmitter that stimulates the movement of skeletal muscles?

• Sodium

• Acetylcholine

• Calcium

• Potassium

Once the action potential reaches the end of the motor neuron what takes place?

• Acetylcholine is released into the synaptic cleft.

• Calcium is pumped into the sarcolemma.

• Calcium is pumped into the synapse.

• The muscle contracts.

What is the name of the component that houses the neurotransmitters?

• Synaptic cleft

• Acetylcholine

• Receptors

• Synaptic vesicles

Once sodium is pumped into the sarcoplasm, what happens?

• Voltage of the cell changes to become more positive.

• The process ends and ACh breaks down.

• Calcium is pumped out of the sarcoplasmic reticulum

• Acetylcholine is released into the synaptic cleft.

Tags

NGSS.HS-LS1-7

The organelle containing actin and myosin identified as #9

• ACh
• Sarcolemma
• Vesicle
• Myofibril

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

• sarcomere
• myofilament
• sarcolemma
• sarcoplasm

What is the structure that stores the Calcium in the muscle cell? 

• Sarcoplasm
• Sarcolemma
• Sarcoplasmic Reticulum
• Myofibril

Once acetylcholine binds to receptor cells on the sarcolemma, what takes place?

• Ion channels open and sodium rushes inside the cell

• The muscle contracts.

• Calcium is pumped out of the sarcoplasmic reticulum.

• Synaptic vesicles release acetylcholine into the synapse