MEDSCI 142
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| The nervous system *two types* | show 🗑
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| PNS | show 🗑
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| CNS | show 🗑
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| Sensory | show 🗑
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| show | -Efferent Neurons -out (1)Somatic (2)Autonomic
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| Somatic | show 🗑
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| Autonomic | show 🗑
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| Alarm responce (immediate action) | show 🗑
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| Relaxation (maintenance) | show 🗑
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| show | -INCREASED: digestion, salivation
-DECREASED: HR -CONSTRICTION: pupils, bronchi
-vaso dilation
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| Stress response | show 🗑
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| 2 STAGES of stress response | show 🗑
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| show | -immediate -sym activation -adrenal medulla sustains>epinephrine>norepinephrine
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| show | -slower, longer lasting -hypothal,pit.,andrenal cortex -cortisol production
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| show | -autonomic nervous system -involuntary -limbic,hypothal.,s.cord -2 neuron pathways
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| ANS pathways | show 🗑
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| Effectors | show 🗑
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| Raynaud's | show 🗑
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| Hormone types | show 🗑
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| show | -to receptors -via blood -on distant target cells
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| Local hormones (2TYPES) | show 🗑
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| Effectors | show 🗑
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| show | -excessive symp stim
-emotional stress
-exposure to cold
-chronic vasoconstriction
-ischemia(lack of blood in hands and feet)
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| show | -circulating
-local
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| show | -to receptors -via blood -on distant target cells
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| Local hormones (2TYPES) | show 🗑
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| Cholera: toxin | show 🗑
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| Lipid soluble Hormones | show 🗑
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| show | -no carrier
-binds to receptors on cell surface
-activate Gprotein>adenyl cyclase
-ATP converted to cAMP
-acivates kinases
-P enzymes
-catalyse reactions producing physiological responses
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| Hypothalamus-pituitary axis | show 🗑
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| show | -releasing norepinephrine & epinephrine into blood stream
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| Adrenal gland MEDULLA | show 🗑
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| show | -STIMULATED: increase in K+ -releases corticoids (aldosterone)
-ACTION: incr blood Na+ & water, decr. K+}incr blood vol & pressure
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| show | -STIMULATED: Ach from pituitary
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| Adrenal gland CORTEX stimulation 1 | show 🗑
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| Adrenal gland CORTEX stimulated 2 | show 🗑
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| Actions of cortisol (seven) | show 🗑
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| show | -in muscle fibres -AAs-->blood -used for synthesis of proteins & ATP production
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| (2)Gluconeogenesis | show 🗑
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| (3)lipolysis | show 🗑
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| (4)stress resistance | show 🗑
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| (5)vasocontrition | show 🗑
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| show | -limits WBC to tissue
-retards tissue repair & wound healing
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| (7)Immune Depression | show 🗑
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