With the Type of Lever System Exemplified by Flexion of the Elbow

question 5

Multiple Choice

With the type of lever system exemplified by flexion of the elbow joint, when an object is held in the hand, the

• A) power arm of the lever is the distance between the elbow joint and the insertion of the biceps muscle
• B) load arm of the lever is the distance between the elbow joint and the hand
• C) velocity and distance moved by the hand is amplified at the expense of the biceps muscle having to exert considerably greater force than the actual load that is moved
• D) only two of these
• E) all of these

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Definitions:

Shutdown Point

The level of operation at which a business or economic activity is no longer profitable and should cease operations for financial reasons.

MC Curve

Refers to the Marginal Cost curve, which depicts the increase in total cost that results from producing one more unit of a good.

ATC Curve

The Average Total Cost curve, a graph that represents the cost per unit of output when all costs (variable and fixed) are considered.

Break-Even Point

The production level at which total revenues equal total expenses, resulting in neither a profit nor a loss.