Muscular System Tour Skeletal Muscle
Muscular System TourHannah Sonnentag5Name HourAnswer these questions by reading the following pagesSkeletal MuscleMove your bones.Muscular Systemyou can control themVoluntary ( )600There are more than muscles in the Human Body!!!400 skeletal muscles in yourbodyOverMuscles are:all types of movementNeeded forcells with several nucleipumping bloodNeeded for(along edges of cell)LongbreathingNeeded forproducing body heat and regulate body temperatureNeeded forprotecting internal organsNeeded forstripes called striations in cell(visible in high power)StripesDid you see cardiac muscle under the microscope?Cardiac Muscle3 Types of MuscleThe muscle of the heart.Identify the three types of muscle from the diagram:Involuntary ( )you cannot controlthem24 hours a day every day ofyour lifeWorkstype of muscleStrongestone nucleus per cell (usually in center of cell)cardiacsmoothskeletalOnlystriping (striationsMuscleMuscleMuscleSmooth Musclethe esophagus,stomach, intestines andother internal organsThe muscle ofyou cannotcontrol themInvoluntary ( )slowly and smoothlyContractcontracted for longperiods of timeCan remainone nucleus per cell (usually in center ofcell)UsuallySomeDid you see cardiac muscle under the microscope?No stripes (striations)
Fascicle (group ofmuscle cells)How a Muscle WorksAnatomy of a Musclecontracting (getting shorter)A skeletal muscle works by .Identify:BCFGDAEmyofibrilsEach muscle cell is made up of smaller .BTendonMyofibrilBonemyofibrilsTheare in contact with a nerve ending.neurotransmitterThe nerve releases a chemical called a .neurotransmitter stimulates the entire muscle to contract.TheCMyofibril relaxedIdentify:ACell NucleiCAFascicleFascicleBMyofibril Relaxed DBody ofMuscleMuscle CellMyofibril ContractedMyofibril ContractedBody of MuscleMuscle to Tendon to BoneMuscle Fiberbonemuscle to .Tendons attachWhich of these (above)is the muscle cell?A1/3 its resting lengthThe muscle can shorten as much as .BoneTendonMuscle CellDFascicle (Bundle ofMuscle fibersGMuscle Fiber(muscle cell)Nuclei ofCellEOpposites Contract and relaxFMyofibrilMuscles work in .pairsWhile one muscle in the pair contractsthe other must .relaxBCD
Muscular System Tour Labpage 4The Muscles a back viewThe Muscles a front viewAIdentify: place the letter next to the name.ABGCHJTeres majorFTricepsBDTrapeziusEMuscles to fingersBicepsBrachioradialisCDeltoidLatissimus ments of usSerratusMasseterNGNBGluteus maximusAchilles tendon HamstringJLMBKILabel: place the letter next to the name.DCGluteus maximusJIHGHLatissimus dorsiEGastrocnemiusUse your front view and back viewOdiagrams to label these musclesPectoralis majorFCMuscles to fingersJFHamstring TendonECFGluteus mediusKLigament of wristOMRectus AbdominusFEAGSternomastoidDIdentify: place the letter next to the name.GastrocnemiusPectoralis majorHLMletter next to the name.JKFIdentify: place rior obliqueGluteus mediusG
Ligaments hold bones together18How many ligaments are shown in the labeled diagram?Hint: you will need to count the ligaments in the diagram (not bone or tendon)Describe the feeling of having your muscles artificially stimulated?Odd it makes your body feel limp and you are not the one doing the work.
The Muscular System Tour LabThe Muscular SystemThere are more than 600 muscles in the Human Body!!!Muscles are Needed for all types of movement.Needed to pump bloodNeeded to breathe (diaphragm muscle).Needed to produce body heat and regulatebody temperature.Needed to Protect internal organs.
The Muscular System Tour Lab3 Types of MuscleSkeletal Muscle:Voluntary (under your conscious control)Movement of your bones, face, eyes, etc.Cardiac Muscle:Involuntary (not under your conscious control)Movement of your heart and certain bloodvessels.Smooth Muscle:Involuntary (not under your conscious control)Movement of your intestines, esophagus, andother internal organs.
The Muscular System Tour LabSkeletal MuscleNucleiStriations400X(High Power)Move your bones (also your face, eyes etc)Voluntary (you can control them)Over 400 skeletal muscles in your bodyLong cells with several nuclei (along edges of cell)Stripes called striations in cell (visible in high power)
The Muscular System Tour LabCardiac MuscleNuclei400XStriations cannot be easily seen at(High Power)this magnificationThe muscle of the HeartInvoluntary (you cannot control them)Works 24 hours a day every day of your life!!!Strongest type of muscleOnly one nucleus per cell (usually in center of cell)Some striping (striations) but not as much as skeletal muscle
The Muscular System Tour LabSmooth MuscleNuclei400X(High Power)The muscles of the esophagus, stomach, intestines andother internal organsInvoluntary (you cannot control them)Contract slowly and smoothlyCan remain contracted for long periods of timeUsually one nucleus per cell (usually in center of cell)No striping (striations)
The Muscular System Tour LabAnatomy of a MuscleBody ofBoneTendonMuscleFascicle(Bundle of Muscle Fibers)Muscle Fiber(Muscle Cell)Nuclei of cellMyofibril
The Muscular System Tour LabHow a Muscle WorksA skeletal muscle works byCONTRACTING (getting shorter).The muscle can shorten as much as1/3 its resting length.Fascicle (group of muscle cells)Each muscle cell is made up of manysmaller MYOFIBRILSMuscle CellThe MYOFIBRILS are in contactwith a nerve ending.Myofibril RelaxedThe nerve releases a chemicalcalled a NEUROTRANSMITTER.The Neurotransmitter stimulatesthe entire muscle cell to contract.Myofibril ContractedNerve ending in contact with muscle cellMotor NerveMyofibrilsMuscle Cell
The Muscular System Tour LabMuscle to Tendon to BoneTendonMuscleTENDONSAttachBoneMuscle to BoneMuscleTendonBoneBoneTendonMuscle
The Muscular System Tour LabOpposites Contract and laxedContractedArm Flexed (bent)Arm ExtendedMuscles work in pairs. The biceps muscle will bend the arm at theelbow and the triceps muscle will straighten the arm.While one muscle in the pair contracts the other must relax.
The Muscular System Tour LabThe Muscles a front view
The Muscular System Tour LabThe Muscles a back view
The Muscular System Tour LabThe Muscles a side viewLigament of wristUsing the muscle diagrams for theAfront view and the back view, identifyand label these muscles on your labKBJsheet.(do front and back view stations first)CDIChoose muscle names from this list:Gluteus maximusHGLatissimus dorsiPectoralis majorFGastrocnemiusMuscles to fingersTricepsBrachioradialisDeltoidBicepsExterior obliqueGluteus mediusHamstring tendonE
The Muscular System Tour LabLigaments hold bones together
The Muscular System Tour LabMuscle StimulationAnswer questions on lab answer sheetYour muscles contract when a mild electric current comes in contactwith the myofibrils in the muscle cells. The chemicals in your bodyproduce the electricity to cause a muscle to contract.If muscles are stimulated from anartificial electrical signal, they willcontract but without yourconscious control. This is what aMUSCLE STIMULATOR does.Do this:Go see your teacher for ashocking demonstration.(for the next 30 seconds we are incontrol of your muscles)
The Muscular System Tour Lab A skeletal muscle works by CONTRACTING (getting shorter). The muscle can shorten as much as 1/3 its resting length. Each muscle cell is made up of many smaller MYOFIBRILS The MYOFIBRILS are in contact with a nerve ending. The nerve releases a chemical c
There are three types of muscle tissue: Skeletal muscle—Skeletal muscle tissue moves the body by pulling on bones of the skeleton. Cardiac muscle—Cardiac muscle tissue pushes blood through the arteries and veins of the circulatory system. Smooth muscle—Smooth muscle tis
then discuss the role that calpains play in skeletal muscle remod-eling in response to both exercise training and in response to pro-longed periods of skeletal muscle inactivity. Finally, we will also highlight the emerging evidence that calpains play an important signaling role in skeletal muscle. Calpains in Skeletal Muscle
Ch 6 The Muscular System Notes Lisa Peck Muscular System: consists of skeletal muscles and their connective tissue attachments organ- skeletal muscle consists of hundreds of muscle fibers (cells) bound tog. by connective tissue cell- muscle fi
of skeletal muscle organization, gross to microscopic, that we describe in the following sections. Gross Anatomy of a Skeletal Muscle Each skeletal muscle is a discrete organ, made up of several kinds of tissues. Skeletal muscle "bers predominate, but blood vessels, nerve "bers, and su
Dr Anjali Saxena Page 1 SKELETAL MUSCLE- NOTES I Learning Objectives By the end of this section, you will be able to: Describe the layers of connective tissues packaging skeletal muscle Explain how muscles work with tendons to move the body Identify areas of the skeletal muscle fibers Describe excitation-contraction coupling & Neuromuscular junction
skeletal muscle and tendon provides important insights into basic biological processes and the design of therapies for the treatment of diseases and injuries. Several cytokines have been identified as important regulators of skeletal muscle mass. One of the most potent cytokines that regulate skeletal muscle mass is myostatin (GDF-8).
Chapter 3 – Skeletal and Muscular System Subject - Science Class V Skeletal system and its functions Skeletal system is the framework of the body, consisting of bones and other connective tissues, which protects and supports the body tissues and internal organs. The human skeleton contains 206 bones.
Age group: 5–18 Published: September 2014 Reference no: 140157 Her Majesty’s Chief Inspector (HMCI) raised concerns about low-level disruption in schools in his Annual Report 2012/13. As a consequence, guidance to inspectors was tightened to place greater emphasis on this issue in routine inspections. In addition, HMCI commissioned a survey to ascertain the nature and extent of low-level .
