Question

When a muscle is exerting force equal to the force being placed on it leading to no visible change in muscle length.

a) Isometric contraction is when a muscle is exerting force equal to the force being placed on it leading to no visible change in muscle length.
b) Isotonic contraction is when a muscle is exerting force equal to the force being placed on it leading to no visible change in muscle length.
c) Concentric contraction is when a muscle is exerting force equal to the force being placed on it leading to no visible change in muscle length.
d) Eccentric contraction is when a muscle is exerting force equal to the force being placed on it leading to no visible change in muscle length.

Answer 1

An isometric contraction occurs when a muscle exerts force equal to the force placed on it, leading to no change in muscle length.

Step-by-step explanation:

An isometric contraction occurs when a muscle is exerting force equal to the force being placed on it, leading to no visible change in muscle length. Muscle tension increases, but muscle length remains the same. Isometric contractions are active in maintaining posture and joint stability. They occur when the force produced by the muscle cannot overcome the resistance provided by the load. Isotonic contractions, on the other hand, involve changes in muscle length as the load is moved.