________ Is a Reactant Substance That Is Acted Upon by a Specific

question 1

Multiple Choice

________ is a reactant substance that is acted upon by a specific enzyme.

• A) Amylase
• B) A substrate
• C) Maltase
• D) A catalyst

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Definitions:

Sarcomeres

The fundamental units of a muscle's myofibril, responsible for muscle contraction.

Z Line (Disc)

A key component in skeletal muscle fibers that anchors the actin filaments and marks the boundary between sarcomeres.

Motor Unit

A single motor neuron and all the muscle fibers it innervates, functioning as a single operational unit in muscle contraction.

Neuron

A specialized cell transmitting nerve impulses; a nerve cell.