HTHSCI 1H06 Lecture Notes - Lecture 5: Cardiac Muscle, Skeletal Muscle, Blood Vessel
16 Apr 2019
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Document Summary
Muscular tissue consists of elongated cells called muscle fibers (myocytes) that can use atp to generate force. Producing body movements: movements of the whole body such as walking or running and localized movement such as grasping a pen reply on the integrated functioning of skeletal muscles, bones and joints. Skeletal muscle contractions stabilize joints and help maintain body positions such as standing or sitting: cardiac muscle contractions of the heart pump blood through the blood vessels of the body. Generating heat: when a muscular tissue contacts, it produces heat, a process known as thermogenesis, much of the heat generated by muscle is used to maintain normal body temperature. Involuntary contractions of skeletal muscle, known as shivering can increase the rate of heat production. Electrical excitability: produce action potentials, two main types of stimuli trigger action potentials. Autorhythmic electrical signals (arising in the muscular tissue itself) Chemical stimuli (neurotransmitters released by neurons, hormones distributed by the blood, local ph changes)
