Isaac Observed a Sample of Motor Units in Which Single

question 110

Multiple Choice

 Isaac observed a sample of motor units in which single neurons innervated fibers of the same type. This led Isaac to conclude that

• A) neural input probably determines the identity of muscle fibers as slow- or fast-twitch.
• B) the organism that supplied the samples had probably suffered a spinal cord injury.
• C) the organism that supplied the samples was very old.
• D) his sample was not representative, and he needed to obtain more samples before reaching a conclusion.

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Definitions:

Consumer Surplus

The discrepancy between what consumers are ready and capable of spending for a good or service, as shown by the demand curve, and the actual amount paid by them, known as the market price.

Producer Surplus

The difference between what producers are willing to accept for a good or service versus what they actually receive, due to market prices.

Total Surplus

The aggregate benefit to society, constituted by the addition of consumer and producer surplus, derived from the creation and utilization of goods and services.

Total Surplus

The aggregate of producer surplus and consumer surplus, symbolizing the complete net advantage to society through the consumption and manufacture of goods and services.