ANAT 322 Lecture Notes - Lecture 9: Basal Lamina, Tight Junction, Extracellular Fluid

• School: McGill University
• Department: Anatomy & Cell Biology
• Course: ANAT 322
• Professor: David Ragsdale

Document Summary

Posterior as extended brain (neural), posterior pituitary is site of release of oxytocin & vasopressin. Basic (blue dye), acidic (red); strong staining in front, not back anterior & posterior lobe. Middle where strongly stained: vacuoles, intermediate lobe (larger in lower vertebrates & non- primate mammals; rudimentary in primates) Posterior pituitary releases neuropophyseal peptides (oxytocin, vasopressin); peripheral hormones w/peripheral target tissues, through bloodstream. Acth, gh, prolactin, fsh, lh, tsh are glandotropic hormones (target other endocrine glands in periphery; themselves are regulated by hypothalamus releasing factors) Acth controls cortex of adrenal gland (produces steroid hormones) amsh & b-endorphin produced & released in intermediate lobe (rudimentary in primates) amsh regulates metabolism, controls colour change in lower vertebrates. Adult pituitary in bony pouch: posterior is neural (neurons directly release hormones produced in hypothalamus), anterior & intermediate are endocrine (endocrine cells produce hormones) Basophilic blue (absorb basic dye), acidophilic red/orange (absorb acidic dye), chromophobic (scared of colour)