Neurotransmitters and Muscle Contraction Quiz

Why are neurotransmitters necessary at the neuromuscular junction?

• They provide energy for muscle contraction.

• They act as a bridge for action potentials to cross the synaptic cleft.

• They directly stimulate muscle fibers to contract.

• They prevent muscle fatigue.

Which specific neurotransmitter is released during this process?

• Dopamine

• Serotonin

• Acetylcholine

• GABA

Identify the following protein channels as either voltage-gated channels or chemically-gated channels: The Calcium channels on the axon terminal.

• Voltage-gated channels

• Chemically-gated channels

• Mechanically-gated channels

• Light-gated channels

Identify the following protein channels as either voltage-gated channels or chemically-gated channels: The channels found on the sarcolemma of the muscle fiber.

• Voltage-gated channels

• Chemically-gated channels

• Mechanically-gated channels

• Light-gated channels

Identify the following protein channels as either voltage-gated channels or chemically-gated channels: The channels along the T-tubules.

• Voltage-gated channels

• Chemically-gated channels

• Mechanically-gated channels

• Light-gated channels