What occurs when muscle fibers get longer?
photosynthesis rapid expansion kinetic energy cramps relaxation fertilization movement sweating
A B C D E F G H
Muscles can only contract and relax.
muscle relaxation occurs when muscle fibers get longer
What occurs when muscle fibers get longer? (A) photosynthesis (B) rapid expansion (C) kinetic energy (D) cramps (E) relaxation (F) fertilization (G) movement (H) sweating