lecture 3 Flashcards
posterior lobe of pituitary gland
neurohypophysis
anterior lobe of pituitary gland
adenohypophysis
posterior pituitary gland actions
- connected to hypothalamus by neurons
connected via neural communication - secretes hormones into the blood
hormones down axon, stored at endings until required
posterior pituitary hormones secreted
peptide hormones Antidiuretic hormone (ADH) or oxytosin
anterior pituitary gland actions
- connected to hypothalamus by blood vessels
- neuron short axon in hypothalamus
- releasing hormones into bed of capillaries
- hormones membrane receptor stimulate/inhibit specific peptide hormone release secretion
anterior pituitary hormones secreted
prolactin growth hormone (growth hormone releasing hormone)
growth hormone how?
stimulates cell division promotes growth of bones, muscles, tissues
stimulates protein synthesis
increases blood glucose concentration (glucose synthesis in liver AND inhibiting uptake in muscle)
growth hormone conditions
hyposecretion: too little (or none)
hyper secretion: too much
hyposensitive: little (or no) response
hypersensitive: respond too much
growth hormone disorders
deficiency= dwarfism
excess=gigantism
normal levels
growth hormones other important
thyroid, insulin, cortisol, estrogen, testosterone