Ch. 1 Homeostasis Flashcards
Mechanistic
in terms of cause and effect sequences, how?
Epithelial Tissue
- epithelia sheets
- Secretory glands,
exocrine: lumen forms creating a duct provides a passageway for secretions to move to the surface
endocrine: loose connecting bridge to parent epithelium, secretions go directly into the bloodstream in small amounts, target ALWAYS has receptors *always in conjunction with blood vessel
Homeostasis
- dynamic state
- balance; internal and external
- minimizes change
Extracellular Fluid (ECF)
Fluid environment in which the cells live
two components: plasma and interstitial fluid
Intercellular Fluid (ICF)
fluid contained within all body cells
Teleological
in terms of meeting a bodily need; why?
Cell Functions
obtain nutrients and oxygen from environment
perform chemical reactions that provide energy for the cell
eliminate carbon dioxide and other wastes to surrounding environment
synthesize needed cellular components
Factors Homeostatically Regulated
Concentration of: nutrient molecules, O2 and CO2, waste products, pH, water, salt and other electrolytes, volume and pressure, and temperature
Circulatory system Contribution
carries material from one part of the body to another
Digestive System Contibution
breaks down dietary food, transfer water and electrolytes, eliminates undigested food residues
Respiratory System
gets O2 from and eliminates CO2 to the external environment
maintains proper pH of internal environment
Urinary System
removes excess water, salt, acid, and other electrolytes from plasma and eliminates them in urine
Skeletal System Contributions
provides support, storage reservoir for calcium, enables movement of body and its parts, bone marrow is ultimate source of all blood cells
Muscular System
moves the bones
Integumentary System Contribution
outer protective barrier, important in regulating body temperature
