The Reason the Homunculus for the Motor Cortex Is Shaped

question 7

Multiple Choice

The reason the homunculus for the motor cortex is shaped the way it is (huge tongue,large hands) is that

• A) it is a drawing of all the motor functions of the body,and it is not drawn to scale.
• B) in the homunculus picture,the amount of cortex devoted to each part of the body is represented by the relative size of the body part.
• C) it is a reproduction of a drawing done the late eighteenth century.
• D) there is an inverse relationship between the actual size of each body part to its representation in the homunculus drawing.The trunk of the body,for instance,is drawn very small,while the tongue is drawn very large.

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Definitions:

External Cost

Costs incurred by third parties as a result of an economic transaction, which are not reflected in the transaction's market price, often necessitating government intervention.

Social Cost

The total cost to society, including both private costs incurred by individuals and external costs not accounted for by the market.

Demand Curve

A graphical representation of the relationship between the price of a good or service and the quantity demanded for a given period.

Supply Curve

The supply curve is a graphical representation showing the relationship between the price of a good or service and the quantity supplied for a given period, typically upward sloping.