Unit 5 Day 1 Anatomy To understand is to forgive, even oneself. Alexander Chase

Today’s Agenda Return Tests Return Tests Notes on objectives 1-3 Notes on objectives 1-3 Practice objectives 1-3 Practice objectives 1-3 Plans for tomorrow Plans for tomorrow

Fig , p. 663

Fig. 33.8, p. 566 width of one muscle cell nucleus cells teased apart for clarity junction between adjacent cells SKELETAL MUSCLE SMOOTH MUSCLE CARDIAC MUSCLE Obj. 1

Fig , p. 656 triceps relaxes biceps contracts at the same time, and pulls forelimb up triceps contracts, pulls the forelimb down at the same time biceps relaxes

Fig. 33.9, p. 566 one muscle cell biceps bundle of muscle cells surrounded by connective Tissue (endomysium outer sheath of connective tissue around muscle (epimysium)

Fig a, p. 658 muscle’s outer sheath (connective tissue) muscle cell myofibril perimysium fascicle

Fig b, p. 658 one myofibril inside cell: Z band H zone Z band sarcomere I bandA band I band

Thick filament Thin filament

Fig c, p. 658 one actin molecule thin filament Arrangement of actin molecules in the thin filaments of a sarcomere parts of myosin molecule thick filament Arrangement of myosin molecules in the thick filaments of a sarcomere

Fig , p. 659 Cross-bridge forms between an actin and a myosin filament Actin filament slides past myosin filament, toward sarcomere’s center, in a power stroke The cross bridge is broken Another cross- bridge forms between same filaments Another power stroke slides actin filament closer to the center of sarcomere between contractions actinmyosinactin same sarcomere contracted

Fig , 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

For Tomorrow Gloves Gloves Groups Groups Depelting Depelting

Fig , p. 660 Pathway 1 DEPHOSPHORYLATION CREATINE PHOSPHATE Pathway 2 AEROBIC RESPIRATION Pathway 3 GLYCOLYSIS ALONE creatine oxygen glucose from bloodstream and from glycogen breakdown in cells ADP + P i Relaxation Contraction

Fig , p. 660,61 section from spinal chord motor neuron Signal from the neuron system travel along spinal cord, down motor neuron T tubule section from a skeletal muscle Sarcoplasmic reticulum (calcium storage) plasma membrane of skeletal muscle cell Z band one of the myofibrils inside the muscle cell

Fig , p. 661 troponintropomyosin actin myosin head myosin binding site blocked actin

Fig , p. 662 peak relaxation stimulus contraction starts time number of stimuli per second tetanic contraction repeated stimulation twitch

Fig , p. 583 STIMULUS Biceps stretches. RESPONSE Biceps contracts axon axon ending receptor endings peripheral axon cell body axonaxon endings dendrites INTERNEURONMOTOR NEURONSENSORY NEURON Spinal cord

animation Click to view animation.

Unit 5 Day 2 The most difficult thing in life is to know yourself. Thales

Today’s Agenda Depelting instructions Depelting instructions Depelt Depelt Clean-up Clean-up

Depelt Specimen abdominal side up on tray. Specimen abdominal side up on tray. Incision through pelt only…no muscles. Incision through pelt only…no muscles. Cut fascia, lift, cut fascia. Cut fascia, lift, cut fascia.

Unit 5 Day 3 If you want to be respected by others, the great thing is to respect yourself. Fyodor Dostoyevsky

Unit 5 Day 4 Too many people overvalue what they are not and undervalue what they are. Malcom Forbes

Unit 5 Day 5 Striving for excellence motivates. Striving for perfection is demoralizing. Dr. Harriet Braker