The Question is from neet-zoology , and it was created by the author T SAILAJA

Question

The inability of a muscle to relax between rapid, repeated stimuli leads to a sustained contraction called:

T SAILAJA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Muscle Contraction and Stimulation
 **Related Topics**: Muscle physiology, neuromuscular junction, action potentials, tetanus, twitch
 **Prerequisites**: Understanding of muscle fiber excitation-contraction coupling.
## SOLUTION PATHWAY
**Given Information**:
  Rapid, repeated stimuli; inability of muscle to relax between stimuli.
  Sustained contraction occurs.
**Method & Steps**:
 1. Identify the type of muscle contraction described.
  Reasoning: The question describes a sustained contraction due to high-frequency stimulation preventing relaxation between individual contractions.
  Formula/Rule: None directly applicable, this is a conceptual understanding.
 2. Recall the terminology for this type of sustained contraction.
  Working:  The inability to relax between stimuli leads to a summation of contractions, resulting in a sustained contraction called tetanus.
  Key Point:  A single muscle twitch is a brief contraction followed by relaxation. Tetanus is a sustained contraction.
 3. Select the correct answer.
  Result: Tetanus (D)
  Verification: The definition of tetanus matches the description given in the question.
 ## OPTION ANALYSIS
[A] :x: Fatigue is a decrease in muscle performance due to prolonged activity.
[B] :x: Tonus refers to the constant, slightly contracted state of muscles.
[C] :x: A twitch is a single, brief contraction-relaxation cycle of a muscle fiber.
[D] ✓: Tetanus is a sustained muscle contraction resulting from repeated stimulation without relaxation.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing tetanus with fatigue or tonus: Understand the distinct physiological mechanisms behind each.
  2.Misunderstanding the role of stimuli frequency: High-frequency stimulation is crucial for tetanus development.
 **Quick Tips**:
  1.Remember that tetanus is a sustained contraction, unlike a twitch which is brief and followed by relaxation.
  2.Associate tetanus with rapid, repeated stimuli preventing relaxation.

T SAILAJA · Answer

Fatigue

T SAILAJA · Answer

Tonus

T SAILAJA · Answer

Twitch

T SAILAJA · Answer

The correct Option is "Tetanus"

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