Hypothalamus and pituitary Fig.7-11. Posterior pituitary Fig.7-12 HYPOTHALAMUS Vein POSTERIOR...
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Transcript of Hypothalamus and pituitary Fig.7-11. Posterior pituitary Fig.7-12 HYPOTHALAMUS Vein POSTERIOR...
Hypothalamus and pituitary
Fig.7-11
Posterior pituitary
Fig.7-12
HYPOTHALAMUS
Vein
POSTERIOR PITUITARY
Anterior pituitary
Fig.7-12
Endocrine cells
Neurons
Portal vessels
HYPOTHALAMUS
Veins
Artery
ANTERIOR PITUITARY
POSTERIOR PITUITARY
Capillary bed
Capillary bed
TO TARGET ORGANS
Adrenal gland
Fig. 23-1
Adrenalcortex
Adrenalmedulla
Goiter
Bone growth
Fig. 23-16
Epiphysis
Diaphysis
Epiphyseal plate
Diaphysis
Compactbone
Osteoblast
Chondrocyte
Cartilage
Bone growth
Newlycalcifiedbone D
irecti
on o
f gro
wth
Osteoblasts
Old chondrocytes
Chondrocytes
Dividing chondrocytes
Acromegaly
Fig. 23-14
Functions of muscle
Fig. 12-2
Flexion
Extension
Biceps musclecontracts (flexor)
Tricepsmusclerelaxes
Triceps musclecontracts (extensor)
Bicepsmusclerelaxes
Functions of muscle
Fig. 12-2
PeristalsisVasoconstriction
Hydrostatic Pressure
Types of muscle
Fig. 12-1
Nucleus
Muscle fiber(cell)
Striations
Skeletal muscle
Types of muscle
Fig. 12-1
Muscle fiber
Nucleus
Striations
Cardiac muscle
Intercalated disk
Types of muscle
Fig. 12-1
Muscle fiber
Nucleus
Smooth muscle
Muscle structure
Fig. 12-3
Skeletal muscle
Muscle fascicle:bundle of fibers
Muscle fiber
Connective tissue
Connectivetissue
T endon Nerve andblood vessels
Nucleus
Muscle structure
Fig. 12-3
T-tubules
Sarcoplasmicreticulum
Sarcolemma
Mitochondria
Myofibril
Thickfilament
ThinfilamentNucleus
ULTRASTRUCTURE OF MUSCLE
Muscle structure
Myofibril
Z disk
Z disk Z disk
Z diskSarcomere
Thin filaments
Tropomyosin
Troponin
Actin chain G-actin molecule
Myosin tail
Myosin heads
Myosin molecule
Thick filaments
Hingeregion
Titin
Titin
M line Myosincrossbridges
M line
Fig. 12-3
Cross-bridge cycle
Fig. 12-9
ADP ADP
Actinmoves
Cytosolic Ca2+
Tropomyosin shifts,exposing bindingsite on actin
TN
Power stroke
Initiation of contraction
Troponin G-Actin
Tropomyosinblocks binding
site on actin
Myosin head
TN
Relaxed state. Myosin head cocked.
Pi
Pi
1
2 3
4
5
Sarcomere contraction
Fig. 12-8