Which of the Following Is Not True for the U

question 139

Multiple Choice

Which of the following is not true for the U.S.payroll tax?

• A)The incidence falls mainly on employees.
• B)It is levied on employers.
• C)It is levied on employees.
• D)The incidence falls mainly on employers.

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Definitions:

Motor Units

A motor unit consists of a single motor neuron and all the muscle fibers it innervates, essential for muscle contraction.

All Or None

A principle stating that a neuron either fires with a full response or does not fire at all, depending on stimulus strength.

Contraction

The process in which a muscle becomes shorter and tighter, producing movement or exerting force.

Single Muscle Contraction

The process by which a muscle fiber receives a nerve impulse and momentarily contracts or shortens.