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Physiology

Chapter 1

QuestionAnswer
Neurons Transmit Signals for communication
Skeletal, Smooth, Cardiac Voluntary, involuntary, involuntary
Epithelial Cells Functions as: a barrier to help protect from virus, bacteria, etc., and transport membrane.
Epithelial Cells location covers external and internal body surface from mouth to anus
Connective Tissue Cells most diverse*anchor & link structure of body*ex)bone & blood cells, fibroblasts(gives skin elasticity), fat/adipose cells
Tissue types nerve, muscle, epithelial,connective
What are the internal and external environments separated by? Epithelial membrane
External-internal exchange External-blood-tissue fluid-cells (nutrients &O2)-waste unneeded material
Homeostasis-Temp,volume, composition Temp ~37 to keep enzyme functioning, too much volume(edema) too little dehydrate, composition: (Fe conc, gas conc, Na conc)
Negative feedback If a regulated variable decreases, system responds to make it increase and vise versa (self correcting)
Examples of Negative feedback Blood pressure increasing, person laying down, BP normal, he gets up then BP falls. BP receptors stimulated, increasing heart rate and increasing BP
Positive feedback If something increases, the + feedback will increase more. Only 2 types & they happen in female's body
Examples of Positive feedback 1.Pituitary gland (LH secretion) & Ovaries (increase estrogen secretion). Those 2 increase and increase until ovulation and then it decreases 2.labor(triggering contraction, the more Oxytocin the stronger the contraction
Created by: izis
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