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Lecture 19

Lecture 19 on Smooth Muscle Integrative Control of Body Movement

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Biological Sciences
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BIOB30Fall2011 Lecture 19 Smooth Muscle Integrative Control of Body MovementSmooth Muscleo Found in walls of hollow organs and some types of blood vessels o Contraction changes shape of organs o Moves material around the bodyo It has no motor end plate instead it has a neuroeffector junction ANS o Consumption of oxygen is low and fatigue is low o Less energy is required to generate force o This causes is to be able to maintain force over long periods of timeo Small spindle shaped cells with single nucleus make up smooth muscle vs Many nuclei in skeletal muscle o There are ea variety of smooth muscle types vascular gastrointestinal urinary respiratory reproductive and ocularo Controlled by many NTS ex Acetylcholine norepinephrine and hormonesex Sex hormones o Many signals can activate smooth muscle at the same time so it must act as an integra
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