Physiologists Are Studying the Biomolecular Mechanisms Underlying Skeletal Muscle Contraction

question 148

Multiple Choice

Physiologists are studying the biomolecular mechanisms underlying skeletal muscle contraction.  They have been analyzing muscle fibers obtained from knockout mice to determine how different cellular substances influence muscular contraction.  Striated muscle fibers obtained from a specific mouse embryo fail to contract in response to a substance normally released from the sarcoplasmic reticulum.  A deficiency of which of the following would best explain this finding?

• A)Acetylcholine
• B)Epinephrine
• C)Calmodulin
• D)Myosin light-chain kinase
• E)Troponin

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Definitions:

Reasonable Access

The concept that services, resources, or systems should be easily accessible to those who need them, without undue hardship.

Deliberate Action

involves intentional, conscious behavior aimed at achieving a specific result.

Decision-making

The cognitive process of selecting a course of action from multiple alternatives, often involving judgment, evaluation, and consideration of outcomes.

Paternalism

A behavior by an authority that limits someone's freedom or responsibilities for their own good, often without their consent.