BIOL 243 Lecture Notes - Lecture 12: Skeletal Muscle, Striated Muscle Tissue, Creatine Kinase
25 Oct 2016
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All movements require muscle, which are organs, using chemical energy to contract. Make up nearly half of body"s mass. Transforms chemical energy (atp) to mechanical energy: exerts force. Myo, mys, and sacro are the prefixes for muscle. 3 types of muscle: skeletal, smooth, cardiac. Only in heart; bulk of heart walls. Body location attached to bones or (some facial muscles) to skin. Walls of hollow visceral organs; multi unit muscle in intrinsic eye muscles, airways, large arteries. Single, very long, cylindrical, multinucleate cells with obvious striations. Branching chains of cells; uni- or bi- nucleate; striations. Each muscle is composed of skeletal muscle tissue, nervous tissue, blood, and other connective tissues. Connective tissue coverings: layers of dense ct, called fascia, surround and separate each muscle, extends beyond ends of muscle and gives rise to tendons that"re fused to the periosteum of bones.
