00:01 So to conclude our lecture on the muscular system, recall that the muscular system is made up of three different types of muscles. 00:09 We have skeletal muscles, cardiac muscles, and smooth muscles. 00:14 Skeletal muscle cells are referred to as skeletal muscle fibers and are multinucleated and striated. 00:23 The major functional properties of our skeletal muscle fibers include their electrical excitability, their contractility, their extensibility, and their elasticity. 00:37 The contractility of our muscle fibers involves the sliding of microfilaments in the skeletal muscle fiber. 00:46 Contraction is coupled with electrical excitation of the skeletal muscle fiber. 00:54 Impulses come from the nervous system to the muscular system at the neuromascular junction. 01:03 Cardiac muscles differ from skeletal muscles as they are involuntary muscles. 01:09 While there are some similarities, cardiac muscles also exhibit differences in their structure and their function. 01:17 Finally, smooth muscles are also going to differ from our skeletal muscles. 01:23 While they are also involuntary like our cardiac muscles, they use different regulatory proteins during the process of a contraction compared to skeletal muscles. 01:36 This concludes our lecture on the muscular system. 01:40 Thank you for listening.
The lecture Muscle Tissue: In a Nutshell (Nursing) by Jasmine Clark, PhD is from the course Musculoskeletal System – Physiology (Nursing).
What are the major functional qualities of skeletal muscle? Select all that apply.
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