Muscle Part 1 DTH24 GN.pdf

Muscle - Part 1 Julie Watson No! Not that type of Mussel! emojipe dia GDC learning Outcomes 1.1.1 1.1.3 1.1.5 Loading… 9.1 9.2 3 Formative Assessment Following the two sessions on Muscle,...

Muscle - Part 1 Julie Watson No! Not that type of Mussel! emojipe dia GDC learning Outcomes 1.1.1 1.1.3 1.1.5 Loading… 9.1 9.2 3 Formative Assessment Following the two sessions on Muscle, there will be a workbook to complete. Loading… 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  muscle ↳ 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 specalised body part that produces Locomotion in humans animals Myofibril & section place to place repetingerr more of mainly A muscle tissue is made up of muscle cells, which in turn consist of several myofibrils ↑ The myofibril is the contractile -To thread of a muscle 11/ ↓ sarcomeres These extend from one end of the by 2 muscle fibre to the other. lines. made 2 of filaments ; myosint actin. I Thicker twinner highly organized into Sarcomeres whenjoined end to end form myofibri  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 The②sarcomere is regarded as the basic structural unit of a muscle. packed other organelle mitrochondria + between myofibrils goycogon granuals. muscle tissue - primary rule is contraction. termed ? als jubre elongated + parral- work effective to to produce movement a mesodermal origin - musal fibre/tissue. Without All cells wouldn't have fuel or power to perform functions necessary to stay alive- eventually die - Muscle Fuel Muscle cells fuel their actions by converting chemical energy in the form of Adenosine Triphosphate (ATP) - Energy carrying Loading… molecule · energy full. This is derived by the metabolism of food into chemical of life energy ATP-universal energy source all ATP converts for food into energy living cells-1920's ↳ essential building Every all living organism has als that very on ATP block for life forms - needs. for energy 11  How is ATP made ? ATPIS USED TOMAKE MUSCLES Work !! Uses molecules in fats , proteins and carbonydrates from food and drink as sources to ATP. of energy make Process - Hydrolysis food eaten-synthesised into glucose Mitochondria then convert this to ATP. , S cellar respiration occurs in al Mitochondria energyfor - - is h Els etypes-aerobic -with oxyge. Tiny subunits with in anaerobic -without that S cells I oxygen. from pecialized in can food we eat extracting energy create into and Sensation in burning ATP. converting when Skeleton exercising. Functions of Muscle Posture/Muscle Tone Digestion Stability Temperature Regulation/Heat Mobility/Movement Production Circulation Organ Protection Respiration Urination  How?Muscles Shorten but lengthen passively forcefully during contraction. When muscles contract cause movement to they Movement structures to which they are attacked. Each individual fibres acts in alt or nothing manor. · Strengh of contraction is related to amount of Muscle fibres activated. Sudden rapid Stimulation of many fibres = TWITCH 13  force/lesfort/load X distance from fulcrum-movement of force First Order Lever Lever systems are the co- Skeletal ordination of our bones and musce muscles to create movement. Two main functions: - joint 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  2 above 37 - almost always a sign of diceate fever or elevation only degree = or >37 : Disease Heat Production =. < 370 = Hypothermia laf ects Healthy survival depends on our ability to maintain a constant body temperature. cellular activity function. and normal body 18 contraction to maintain of muscle gibres produces most of the heat required body temperature. energy required for misel contraction is obtainedThrough ATP. mostenergyneasedduring breakdown muscle contracta se of Ap during Some of lost energy is as hat during reaction. I help to maintain o constant leve- This us body temperature - * Atonic contraction. Muscle tone maintenance allows for posture to be maintained without fatiguing muscles. This is a state of sustained partial contraction of a muscle which does not produc movement. alwayslined. Skeletal muscle tone maintains posture by Achieved by full counteracting pull of contraction of a few gravity. muscle fibreslat a time Gravity-puls forward muscle tone-holds erect - 19  contract over extended period Stimulated to.. Stimulation response nerve gradually Seizes Muscle Fatigue muscle will refuse to contract even with continued acrue contraction. Not enough oxygen and nutrients debt agen Build up of waste products continued Stored ATP becomes depleted. increased metabolism when oxyge rung low theet must occur ↳ anaerobic -without I oxygen. ina cell to remove can excess lactic acid I createburna. ingston exercising-latic acid 20 Properties of Muscle Tissue Muscle cells share several properties Contractility Excitability Extensibility Elasticity 21  contractprimemoder work toa 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 d The ability to respond to a stimulus Stimulated Delivered from a motor neurone or hormone nerve imprises - brain or spinal cord ↳ Neuromuscular junctions. full Skeletal without muse fibres couldn't function. 23  Stretched muscle colls-stimes there contracted length without being ruptures Extensibility d The ability for a muscle to be stretched 24  a stretchedabovabelowest ↑be can Elasticity return to resting length once Stimulus (Stretch or contract) is removed. The ability for the muscle to recoil or bounce back to its original length after being stretched do If muscles couldn't would become this they work. stack and wouldn't 25  End of Part 1 quotes gram