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Jul 17, 2023 · Smooth muscle is found throughout the body where it serves a variety of functions. It is in the stomach and intestines where it helps with digestion and nutrient collection. It is found throughout the urinary system where it functions to help rid the body of toxins and works in electrolyte balance.
Smooth muscle differs from skeletal muscle and cardiac muscle in terms of structure, function, regulation of contraction, and excitation-contraction coupling. However, smooth muscle tissue tends to demonstrate greater elasticity and function within a larger length-tension curve than striated muscle.
Learning Objectives. By the end of this section, you will be able to: Describe a dense body. Explain how smooth muscle works with internal organs and passageways through the body. Explain how smooth muscles differ from skeletal and cardiac muscles. Explain the difference between single-unit and multi-unit smooth muscle.
Understand the structure and function of smooth muscle tissue. By the end of this section, you will be able to: Understand the difference between single-unit and multi-unit smooth muscle; Describe the microanatomy of a smooth muscle cell; Explain the process of smooth muscle contraction; Explain how smooth muscle differs from skeletal muscle
Because most smooth muscles must function for long periods without rest, their power output is relatively low, but contractions can continue without using large amounts of energy. Some smooth muscle can also maintain contractions even as Ca ++ is removed and myosin kinase is inactivated
Jul 30, 2022 · Explain how smooth muscle works with internal organs and passageways through the body. Explain how smooth muscles differ from skeletal and cardiac muscles.
The basic functions of smooth muscle in the organ systems are: Gastrointestinal tract - propulsion of the food bolus. Cardiovascular - regulation of blood flow and pressure via vascular resistance. Renal - regulation of urine flow. Genital - contractions during pregnancy, propulsion of sperm. Respiratory tract - regulation of bronchiole diameter.
