PHGY 209 Lecture Notes - Lecture 21: Skeletal Muscle, Autonomic Nervous System, Myocyte
21 Feb 2018
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Document Summary
The information processed by the nervous system has two forms of output: voluntary movement by the skeletal muscles, visceral organ control (ans) This is the muscle that controls voluntary movement. They enables our arms and legs to contract, under our conscious control. Is responsible for the rhythmic contractions of the heart. They are physiologically similar to skeletal muscles, but contract spontaneously. Cause involuntary contraction in blood vessels (blood flow regulation), gut (digestion), bronchi (air flow regulation) and the uterus (birth) The range of voluntary motion is very vast. However, in all these cases, muscles can only do one thing- they can contract or relax. The vast range of motion can be accounted for by the orientation in which the muscles are attached to the skeletal system. Muscle is attached at each end to tendons, which in turn attach to bone on both sides of a joint. Tendons: fibrous connective tissue; mainly made of protein.
