Muscle - Part 1 PDF

Muscle - Part 1 Julie Watson No! Not that type of Mussel! emojipedia GDC learning Outcomes 1.1.1 1.1.3 1.1.5 9.1 9.2 3 Formative Assessment Following the two sessions on Muscle, there will be a workbook to complete. 5...

Muscle - Part 1 Julie Watson No! Not that type of Mussel! emojipedia GDC learning Outcomes 1.1.1 1.1.3 1.1.5 9.1 9.2 3 Formative Assessment Following the two sessions on Muscle, there will be a workbook to complete. 5 Learning Outcomes By the end of the session, the group will be able to: Classify the different muscle tissue Describe the functions of muscle Be able to describe the properties of muscle tissue 6 Muscle Accounts for 40% of a persons weight 7 Definition noun; A band of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body. 8 Myofibril A muscle tissue is made up of muscle cells, which in turn consist of several myofibrils The myofibril is the contractile thread of a muscle These extend from one end of the muscle fibre to the other. Sarcomere The sarcomere is composed of long fibrous proteins that slide past each other resulting in the appearance of dark and light bands under the microscope The sarcomere is regarded as the basic structural unit of a muscle. Muscle Fuel Muscle cells fuel their actions by converting chemical energy in the form of Adenosine Triphosphate (ATP) This is derived by the metabolism of food into chemical energy 11 Functions of Muscle Posture/Muscle Tone Digestion Stability Temperature Regulation/Heat Mobility/Movement Production Circulation Organ Protection Respiration Urination Movement 13 First Order Lever Lever systems are the co- ordination of our bones and muscles to create movement. Two main functions: 1. To generate muscular effort to overcome a given load 2. To increase the speed of a given movement. https://www.youtube.com/watch?v=V1NC5wOg0TM Copy & paste link to view. Second Order Lever 15 Third Order Lever 16 Diagram showing all Orders 17 Heat Production Healthy survival depends on our ability to maintain a constant body temperature. 18 Muscle tone This is a state of sustained partial contraction of a muscle 19 Muscle Fatigue Not enough oxygen and nutrients Build up of waste products 20 Properties of Muscle Tissue Muscle cells share several properties Contractility Excitability Extensibility Elasticity 21  Contractility The ability of muscle to forcefully shorten For a muscle to work, one will need to flex and the other contract Muscles can only pull, never push 22 Excitability The ability to respond to a stimulus Delivered from a motor neurone or hormone 23 Extensibility The ability for a muscle to be stretched 24 Elasticity The ability for the muscle to recoil or bounce back to its original length after being stretched 25  End of Part 1 quotes gram