BISC 101 Lecture Notes - Lecture 11: Peripheral Nervous System, Cardiac Muscle, Skeletal Muscle
15 Dec 2017
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Feel your right bicep with your left hand and observe its approximate length, thickness, and pliability. Feel your right bicep with your left hand again. Take each of the changes that you observed in your bicep muscle (as it went from relaxed to contracted), and explain each observation in terms of what is happening in the sarcomeres of your biceps. Myosin thick filaments overlaps with actin thin filaments, causing it to become thicker, simultaneously shortening it. There are 3 types of mammalian muscle tissues: skeletal muscle, smooth muscle, and cardiac muscle. Moves skeleton and some internal organs like the tongue. Also found in the throat or pharynx and around the anus. Each muscle bundle consists of numerous muscle fibers bound together by connective tissues. Each muscle fiber is one long cell with several nuclei and many mitochondria. Muscle fibers themselves are made up of even smaller units called myofibrils. Under involuntary control of the peripheral or autonomic nervous systems.
