Anatomy and Cell Biology 2221 Lecture Notes - Lecture 20: Periventricular Nucleus, Posterior Pituitary, Anterior Pituitary
27 Feb 2015
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Both external and internal changes can lead to loss of homeostasis ! These reactions by ne system are geared to maintaining our bodies at the right conditions to. If compensation fails it usually leads to some kind of illness or disease! maintain homeostasis ! Ne system works with hormones. Nt di use over a longer distance and over a greater area. There is general increase of nt concentra&on in &ssues surrounding the varicosi&es or axon terminals that use volumetric transmission. All the cells in the vicinity are a ected. Not a 1:1 communica&on - reaches a lot of di erent cells. It"s slow and not as precise. Neurons release a hormone in the bloodstream. Bloodstream transports it into the en&re body. Hormone then di uses into di erent &ssues. Target &ssues are dependent on the receptors expressed by di erent cells. Hormones can have a low concentra&on but a ect the en&re body. Targets are rela&vely remote (really far away)
