ANAT 1010 Chapter 10: Muscle Tissue
12 Feb 2017
School
Department
Course
Professor
Document Summary
Bones and joints provide leverage and form the framework of the body, but motion results from alternating contraction (shortening) and relaxation of muscles. There are three types of muscle tissue - they differ in terms of anatomy, location, and how they are controlled by nervous and endocrine systems: skeletal muscle tissue. Moves bones (and in some cases, skin, other soft tissues, other skeletal muscles) Striated - alternating light and dark protein bands (striations: cardiac muscle tissue. Forms most of the wall of the heart. Cells have a built-in (intrinsic) rhythm - autorhythmicity. Several hormones and neurotransmitters adjust heart rate by speeding up or slowing down the pacemaker: smooth muscle tissue. Located in the walls of hollow internal structures (and arrector pili muscles) Blood vessels, airways, most organs in abdominopelvic cavity. Also attached to hair follicles in skin. Some has autorhythmicity (e. g. muscles that propel food through gastrointestinal tract) Regulated by neurons and hormones released by endocrine glands.
