Examples of motor-end plate in the following topics:
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- The area of the sarcolemma on the muscle fiber that interacts with the neuron is called the motor-end plate.
- The end of the neuron's axon is called the synaptic terminal; it does not actually contact the motor-end plate.
- A small space called the synaptic cleft separates the synaptic terminal from the motor-end plate.
- Acetylcholine (ACh) is a neurotransmitter released by motor neurons that binds to receptors in the motor end plate.
- As ACh binds at the motor end plate, this depolarization is called an end-plate potential.
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- A neuromuscular junction exists between the axon terminal and the motor end plate of a muscle fiber where neurotransmitters are released.
- A neuromuscular junction is the synapse or junction of the axon terminal of a motor neuron with the motor end plate, as shown in Figures 1 and 2.
- Acetylcholine diffuses into the synaptic cleft and binds to the nicotinic acetylcholine receptors located on the motor end plate .
- These receptors open, allowing sodium ions to flow in and potassium ions to flow out of the muscle's cytosol, producing a local depolarization of the motor end plate known as an end-plate potential (EPP).
- Binding of acetylcholine at the motor end plate leads to intracellular calcium release and interactions between myofibrils, eliciting contraction.
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- A neurological examination is the assessment of sensory neuron and motor responses, especially reflexes, to determine whether the nervous system is impaired.
- The physician can determine whether these findings constitiute a medical syndrome or neurological disorder (e.g., Parkinson's disease, motor neuron disease); then etiological reasons for the problem are then determined (e.g., inflammation).
- Globally, brisk reflexes suggest an abnormality of the UMN or pyramidal tract, while decreased reflexes suggest abnormality in the anterior horn, LMN, nerve or motor end plate.
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- Primary neurulation begins after the neural plate has formed.
- Three main ventral cell types are established during early neural tube development, these include the floor plate cells , which form at the ventral midline during the neural fold stage, as well as the more dorsally located motor neurons and interneurons.
- At the dorsal end of the neural tube, BMPs are responsible for neuronal patterning.
- BMP from the dorsal end of the neural tube seems to act in the same concentration-dependent manner as Shh in the ventral end.
- V0-V3 represent four different classes of ventral interneurons, and MN indicates motor neurons.
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- Motors and generators are very similar.
- Furthermore, motors and generators have the same construction.
- The motor thus acts as a generator whenever its coil rotates.
- Lenz' law tells us the induced EMF opposes any change, so that the input EMF that powers the motor will be opposed by the motor's self-generated EMF, called the back EMF of the motor.
- shows what happens to the metal plate as it enters and leaves the magnetic field.
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- A motor unit is comprised of a single alpha-motor neuron and all the muscle fibers it innervates.
- All of the motor units that subserve a single muscle are considered a motor unit pool.
- Motor unit recruitment is a measure of how many motor neurons are activated in a particular muscle.
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The eye muscles, on the other hand, contain few muscle fibers, enabling them to be more exact in movement so that vision is not jumpy, but consequently they produce very little force.
- These small motor units may contain only 10 fibers per motor unit.
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- When a dielectric is used, the material between the parallel plates of the capacitor will polarize.
- The part near the positive end of the capacitor will have an excess of negative charge, and the part near the negative end of the capacitor will have an excess of positive charge .
- The capacitance for a parallel-plate capacitor is given by:
- Charges in the dielectric material line up to oppose the charges of each plate of the capacitor.
- An electric field is created between the plates of the capacitor as charge builds on each plate.
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- In the long run, however, motors designed to be more efficient always end up costing less.
- The efficiency rating and amount of time the motor will be in operation are also needed.
- For example, the normal lifespan of a typical 100 horsepower motor is around 40,000 hours or about five years of continuous operation (although a well-maintained motor can last much longer).
- For example, the difference between a 96%-efficient 100 horsepower motor and a 92%-efficient 100 horsepower motor is four percentage points.
- The total ($20,000) shows how much extra will have to be paid in electricity over the life of the motor (assuming the motor is in continuous operation).
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- Although the batteries are reliable, they have a limited life, are heavy to ship, and contain toxic materials that require specific removal methods at the end of their useful life.
- Planté plates are still used in some stationary applications, where the plates are mechanically grooved to increase surface area.
- Each plate consists of a rectangular lead grid.
- An odd number of plates is usually used, with one more negative plate than positive.
- Each alternate plate is connected.
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- Plate counting is used to estimate the number of viable cells that are present in a sample.
- The plate count method or spread plate relies on bacteria growing a colony on a nutrient medium.
- The colony becomes visible to the naked eye and the number of colonies on a plate can be counted.
- At the end of the incubation period the colonies are counted by eye, a procedure that takes a few moments and does not require a microscope as the colonies are typically a few millimeters across.
- Examples of a viable cell count are spread plates from a serial dilution of a liquid culture and pour plates.