Endocrine System Overview - Straight A Nursing

Endocrine System Overview Endocrine System Nervous System Similarities Chemical messenger is Chemical messenger is Both control organs/systems hormone neurotransmitter to maintain homeostasis Messenger travels long Messengers travel a very Both use chemical distances intercellular short distance. Just travels messengers communication across the synaptic cleft. Made up of glands/tissues Composed of brain, spinal Negative feedback and organs. The structures cord and nerves. They are are not connected. all connected. Wired Wireless System System . ES is not connected to NS is connected to target Both have target cell target organs organs specificity (ligand-receptor specificity). Targets pretty much all cells NS has target cell Some chemical messengers in the body specificity are the same (NE). Requires blood stream for Target cells of the NS are transport muscle, neurons, adipose and glands Slower than NS.

Endocrine System Overview Endocrinology is the study of endocrine cells/organs, the hormones secreted, regulation of hormone secretion and the effects of hormones on their target cells/organs. Endocrine vs. Exocrine tissues Endocrine secretes hormones, while exocrine secretes all the other stuff (mucus, enzymes, sweat).

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