A muscle fiber will respond to a stimulus when that stimulus reaches the _________blank level.Multiple Choicerigor mortisrelaxationrestingrecruitmentthreshold

Break Down the Problem

1. Identify the context: muscle fiber response to stimulus.
2. Determine the answer choice relevant to how a muscle responds to stimulation.

Relevant Concepts

• Muscle fibers respond to stimuli based on the concept of membrane potential.
• The threshold level is the minimum stimulus required for a muscle fiber to generate an action potential.

Analysis and Detail

• Rigor mortis relates to post-mortem muscle stiffness, not to stimulation responsiveness.
• Relaxation refers to the muscle returning to resting state after contraction.
• Resting indicates the state prior to stimulation, not the response stage.
• Recruitment involves the activation of additional muscle fibers, which occurs after a stimulus passes the threshold.

Verify and Summarize

The correct choice must denote the minimum stimulus required for muscle activation.

Final Answer

The correct answer is threshold.