Unit 5 Day 1 Anatomy
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Transcript of Unit 5 Day 1 Anatomy
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Unit 5 Day 1 AnatomyUnit 5 Day 1 Anatomy
To understand is To understand is to forgive, even to forgive, even
oneself.oneself.Alexander ChaseAlexander Chase
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Today’s AgendaToday’s Agenda
Return TestsReturn TestsNotes on objectives 1-3Notes on objectives 1-3Practice objectives 1-3Practice objectives 1-3Plans for tomorrowPlans for tomorrow
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Fig. 38.26, p. 663
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Fig. 33.8, p. 566
widthof onemusclecell
cellnucleus
cellsteasedapart forclarity
junctionbetweenadjacent cells
SKELETAL MUSCLE SMOOTH MUSCLE
CARDIAC MUSCLE
Obj. 1
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Fig. 38.18, p. 656
triceps relaxes
biceps contracts atthe same time, andpulls forelimb up
tricepscontracts,pulls theforelimbdown
at the same time bicepsrelaxes
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Fig. 33.9, p. 566
one muscle cell
biceps
bundle of muscle cells surroundedby connectiveTissue (endomysium
outer sheath of connective tissue around muscle(epimysium)
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Fig. 38.20a, p. 658
muscle’s outer sheath (connective tissue)
muscle cell
myofibril
perimysium
fascicle
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Fig. 38.20b, p. 658
one myofibrilinside cell:
Z bandZ band H zone Z band
sarcomere sarcomere
I band A band I band
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Thick filament
Thin filament
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Fig. 38.20c, p. 658
one actinmolecule
thin filament
Arrangement of actin molecules in the thin filaments of a sarcomere
parts ofmyosinmolecule
thick filament
Arrangement of myosin molecules in the thick filaments of a sarcomere
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Fig. 38.21, p. 659
Cross-bridgeforms betweenan actin and a myosin filament
Actin filamentslides past myosinfilament, towardsarcomere’scenter, in apower stroke
The cross bridge is broken
Another cross-bridge formsbetween samefilaments
Another powerstroke slides actinfilament closerto the center ofsarcomere
sarcomerebetweencontractions
actin myosin actin
samesarcomerecontracted
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Fig. 38.19, p. 657
TRICEPS BRACHII
PECTORALIS MAJOR
SERRATUS ANTERIOR
EXTERNAL OBLIQUE
RECTUS ABDOMINUS
ADDUCTOR LONGUS
SARTORIUS
QUADRICEPS FERMORIS
TABIALIS ANTERIOR
BICEPS BRACHII
DELTOID
TRAPEZIUS
LATISSIMUS DORSI
GLUTEUS MAXIMUS
BICEPS FEMORIS
GASTRONEMIUS
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For TomorrowFor Tomorrow
GlovesGlovesGroupsGroupsDepeltingDepelting
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Fig. 38.22, p. 660
Pathway 1DEPHOSPHORYLATIONCREATINE PHOSPHATE
Pathway 2AEROBIC RESPIRATION
Pathway 3GLYCOLYSIS ALONE
creatine
oxygenglucose from bloodstream andfrom glycogen breakdown in cells
ADP + Pi
Relaxation
Contraction
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Fig. 38.23, p. 660,61
section from spinal chord
motorneuron
Signal from the neuronsystem travel along spinalcord, down motor neuron
T tubule
section from a skeletal muscle
Sarcoplasmic reticulum(calcium storage)
plasmamembraneof skeletalmuscle cell
Z band Z band
one of themyofibrilsinside themuscle cell
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Fig. 38.24, p. 661
troponin tropomyosin
actin
myosin head
myosin headmyosinbinding siteblocked
actin
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Fig. 38.25, p. 662
peak
relaxation
stimulus contraction starts
time
number of stimuli per second
number of stimuli per second
tetaniccontraction
repeated stimulationtwitch
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Fig. 34.13, p. 583
STIMULUSBiceps stretches.
RESPONSEBiceps contracts
axonaxon axon ending
receptor endings
peripheral axon
cell body
cell body
cell body
axon axon endings
dendrites
dendritesINTERNEURON MOTOR NEURONSENSORY NEURON
Spinal cord
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animation
Click to view animation.
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Unit 5 Day 2Unit 5 Day 2
The most The most difficult thing difficult thing
in life is to in life is to know yourself.know yourself.
ThalesThales
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Today’s AgendaToday’s Agenda
Depelting instructionsDepelting instructionsDepeltDepeltClean-upClean-up
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DepeltDepelt
Specimen abdominal side up on Specimen abdominal side up on tray.tray.
Incision through pelt only…no Incision through pelt only…no muscles.muscles.
Cut fascia, lift, cut fascia.Cut fascia, lift, cut fascia.
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Unit 5 Day 3Unit 5 Day 3
If you want to be respected by others, the If you want to be respected by others, the great thing is to respect yourself.great thing is to respect yourself.
Fyodor DostoyevskyFyodor Dostoyevsky
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Unit 5 Day 4Unit 5 Day 4
Too many people overvalue what Too many people overvalue what they are not and undervalue what they are not and undervalue what
they are. they are.
Malcom ForbesMalcom Forbes
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Unit 5 Day 5Unit 5 Day 5
Striving for excellence motivates. Striving for excellence motivates. Striving for perfection is Striving for perfection is
demoralizing.demoralizing.
Dr. Harriet BrakerDr. Harriet Braker