A. Skeletal Muscle : attached to skeleton, striated, voluntary
B. Cardiac Muscle : heart wall, striated, involuntary
C. Smooth Muscle : walls of hollow structures, non-striated, involuntary
Functions of Muscle Tissue
1. Producing body movement 2. Stabilization of posture 3. Storage and movement of structures within the body 4. Generating heat
Properties of Muscle Tissue
1. Electrical Excitability : a property of both muscle and nerve cells is the ability to respond to certain stimuli by producing electrical signals called Action Potentials. Formuscle cells there are two types stimulus triggered action potentials: a) Auto-rhythmic Electrical Signals : Signals that arise in the muscle itself (Ex: pacemaker in heart) b) Chemical : Signals that arise fromneurotransmitters released by neurons, hormones distributed by the blood, or even local changes in pH. 2. Contractility : is the ability of muscle tissue to contract forcefully when stimulated by an action potential. Muscle contraction generate tension (force of contraction) pulling on its attachment points. If tension overcomes resistance, movement occurs.
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