What Ensures That One Action Potential in the Neuron Yields

question 67

Multiple Choice

What ensures that one action potential in the neuron yields only one action potential in the skeletal muscle fibers of the stimulated motor unit and therefore only one contraction per fiber?

• A) the amount of calcium that enters the pre-synaptic cell
• B) the rate of diffusion of acetylcholine across the synaptic cleft
• C) the number of muscle fibers that make up the motor unit
• D) enzymatic breakdown of acetylcholine by acetylcholinesterase
• E) All of these ensure this one to one ratio.

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Definitions:

Comfortable Ride

A driving experience where the vehicle smoothly navigates terrain with minimal jarring or discomfort to the passengers.

Bogie Centerline

The central line running through a bogie, which is a framework carrying wheels, attached to vehicles such as trains or trailers, aiding in stability and balance.

Bridge Formula

Used to determine how a truck and semi-trailer support their respective loads. Generally, if a trailer sliding bogie is moved forward, the percentage of load supported by the tractor decreases. Bridge formula is also used to determine how tractor axles are loaded when the fifth wheel position is altered. Moving a sliding fifth wheel forward takes load off the drive bogies and transfers it to the steer axle.

Sliding 5th Wheel

An adjustable coupling mechanism on a semi-trailer that allows for the repositioning of the trailer's weight distribution.