Muscle Contraction. Special Characteristics of Muscle Cells 1. Irritability– The ability to receive and respond to a stimulus. 2. Contractibility – The.
Muscular system SKELETAL MUSCLE Skeletal muscle is made up of hundreds of muscle fibers –Fibers consists of threadlike myofibrils –Myofibrils composed.
Control of Growth and Responses in Plants 1 Ch. 27 - Plant Responses.
Muscle Contraction. Muscle Movement Muscle fiber must be stimulated: – By an electrical signal called muscle action potential (AP) – Delivered by motor.
Muscular System
