• What is an endocrine hormone? How does it influence homeostasis vs. the nervous system.
Acts more slowly than NS, NS acts quicker than the ES
Has a longer term effect than NS, NS is moment to moment control
Onset is
...
• What is an endocrine hormone? How does it influence homeostasis vs. the nervous system.
Acts more slowly than NS, NS acts quicker than the ES
Has a longer term effect than NS, NS is moment to moment control
Onset is slower but it last for longer amount of time, NS onset is quicker but lasts for a short amount of time
uses chemical signals, uses chemical and electrical signals
• The endocrine system helps maintain homeostasis as well as the nervous system
• nervous system uses electrical and chemical signals but the endocrine system only uses chemical messengers.
• nervous system is quicker, moment to moment adjustments
• endocrine system is slower to respond, has long term affect
• Endocrine glands are ductless glands that secretes product into the blood indirectly
• into interstitial fluid —> blood
• nervous system will trump the endocrine system because it works fast, specific, short term moment to moment, endocrine is slower
• How can we make a hormone work better
• Increase the number of receptors
• increase the amount of hormone secreted
• Increase temperature
• Increase affinity of receptor
• how tightly the hormone binds to the receptors, longer action and stronger affect
• decrease degradation (extend the 1/2 life)
• Half-life
• the amount of time required before only half of the original product remains
• determined by the chemical class
• the ability to store hormone ( aa can be stored, blood levels don't reflect what our bodies are doing)
• lipid soluble hormones have a higher half life than water soluble hormones
• blood levels reflect our body’s ability to make them
• It is hydrophobic because it doesn't get into our water/urine and get excreted as easily.
• Stimulation
• Stimulating the release of hormones can be
• Neural:
• suckling is going to cause sensory information to synapse on the paraventricular nuclei to release oxytocin
• pain for vasopressin, which synapses on cells on the supraoptic nuclei
• Hormonal
• prolactin inhibiting hormone is going to bind to prolactinocytes which decreases prolactin production
• Dopamine is going to inhibit prolactin
• hormone binding which will cause a response
• Humeral:
• Blood osmolarity, blood pressure, glucose
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