PHSI 208 Lecture Notes - Lecture 16: Myosin, Endoplasmic Reticulum, Cardiac Muscle Cell
Document Summary
Skeletal muscles: attached to bones of the skeleton, enables muscles to control body movement, voluntary. Unique in that they contract only in response to a signal from somatic motor neurons, and cannot contract initiate their own contraction. Cardiac muscles: found only in heart, and moves blood through the circulatory system, involuntary. Skeletal and cardiac muscles are classified as strained muscles because of their alternating light and dark bands seen under the microscope. Smooth muscles: primary muscle of the internal organs, and tubes, such as stomach, urinary bladder, and blood vessels, primary function is to influence the movement of material into, out of, and within the body, lacks striated muscles. Lack of binding results from the less organized arrangement of contractile fibers within the muscle cells: involuntary. Make up bulk of muscle in the body and constitute approx. Usually attached to bones by tendons made of collagen.
