BIO 11 Lecture Notes - Lecture 12: Smooth Muscle Tissue, Skeletal Muscle, Myology
3 Sep 2020
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Document Summary
Contractile the ability to shorten actively and exert a pull of tension that is. Excitable/conductive the ability to respond to stimulation harnessed by connective tissue. Skeletal muscles respond to stimulation by the nervous system and some smooth muscles respond to circulating hormones. Elastic the ability of a muscle to return to its original length after a contraction. Extensible the ability to contract over a range of resting lengths. Smooth muscle cell can be stretched to several times its original length and still contract when stimulated. Without constant muscular contraction we could not sit upright without collapsing or stand without falling over. The abdominal wall and the floor of the pelvic cavity contain layers of skeletal muscle. These muscles support the visceral organs and protect internal tissues from injury. Regulate the entry and exit of material. Skeletal muscles encircle the openings, or orifices, of the digestive and urinary tracts. These muscles provide voluntary control over swallowing, defecation, and urination.
