Answer:
This is achieved because the sodium channels have a refractory period following activation, during which they cannot open again. This ensures that the action potential is propagated in a specific direction along the axon.
Answer: Broca's area
Explanation:
Broca's area is primarily responsible for producing speech. It controls motor functions involved with speech production. It is a region in the frontal lobe of the dominant hemisphere, usually the left, of the brain.
People who have damage to this area of the brain can understand words but struggle to put them together in speech. Tony clearly has no problem processing what is being said but because of the damage he can't put his thoughts to words.
The concentration expressed in parts per million is 782 ppm.
<h3>What is Parts per million?</h3>
It is calculated by dividing the mass of the solution by the mass of a solute present in one million (10⁶) parts.
<h3>Calculation for units in ppm:</h3>
Given:
Mass of blood alcohol = 80 mg/dL = 80 x
g/mL
Density of blood plasma or Mass of blood plasma = 1.023 g/mL
Concentration in ppm = (Mass of alcohol/Mass of plasma) x 
= (80 x
g/mL/ 1.023 g/mL) x 
= 782 ppm
Hence, the concentration expressed in parts per million is 782 ppm.
Learn more about concentration here:
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