Question
The __________ residing in the tendons, acts as a spring to store elastic energy when a tensed muscle is stretched.
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Series Elastic Component
Tendon Elasticity: Series Elastic Component Role
The question asks to identify the component within tendons that functions like a spring, storing elastic energy when a muscle is stretched.
Understanding Muscle Components
Skeletal muscles have components that respond differently to stretch and contraction:
- Series Elastic Component (SEC): This includes the tendons and potentially cross-bridges. Tendons are highly elastic and connect muscles to bones.
- Contractile Component (CC): This is the active muscle fiber (actin and myosin) that generates force.
- Parallel Elastic Component (PEC): This includes the connective tissues surrounding muscle fibers (endomysium, perimysium, epimysium).
Identifying the Spring-like Action
The Series Elastic Component, particularly the tendons, is described as acting like a spring. Here's why:
- When a muscle is stretched, the load is transmitted through the tendon.
- The tendon stretches slightly, storing potential elastic energy, much like compressing or stretching a spring.
- This stored energy can be released rapidly to assist in subsequent movements (e.g., during the stretch-shortening cycle).
The Contractile Component generates force, and the Parallel Elastic Component provides passive resistance around fibers, but the tendon's role as a passive energy-storing spring during stretch aligns perfectly with the Series Elastic Component.
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