Dancers Will Use a Technique Called "Spotting" When They Perform

question 42

Multiple Choice

Dancers will use a technique called "spotting" when they perform spins of the body.By holding their head and eyes on a fixed point in front of them as their body spins they reduce the amount of head spinning and this prevents dizziness.Which of the following is the most likely explanation for why this works?

• A) This will help to reduce the lateral flection of the head and will prevent hyper polarization or depolarization of the hair cells in the macula.
• B) This helps keep the motions detected by the eyes congruent (aligned) with the motions sensed by the vestibular apparatus.
• C) Reducing the inertia of head spin will reduce the flow of endolymph that deflects the hair cells of the crista ampullaris.
• D) When the eyes send a static vision of stability to the brain, it is tricked into believing the body is still and therefore dizziness will not occur.

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Definitions:

Materials Quantity Variance

The variance between the actual amount of materials utilized in manufacturing and the anticipated amount, multiplied by the established unit cost.

Raw Materials Price Variance

The difference between the actual cost and the standard cost of raw materials used in production.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected amount of materials that should have been used, measured at the standard cost.

Labor Efficiency Variance

The deviation between the actual hours taken to produce a unit of output and the standard hours expected, multiplied by the standard labor rate.