Anatomy Test 1

Anatomy Test 1

1. Homeostasis

   • Definition: adjustments made in the body to maintain a level in a certain range
     • pH, blood pressure, breathing rate
   • Stimulus
     • receptor/ sensors
       • Control center
         • effector
           • homeostasis restored
   • Feedback
     • Negative: opposes initial change; corrective adjustment opposes original deviation from normal level
       • Most body systems use this
     • Positive: amplifies initial change so controlled variable continues to move in the direction of initial change
       • Breast feeding and platelet clotting

2. Organization

   • Cellular: cells and their parts
     • Tissue: groups of similar cells that perform similar functions
       • Epithelial: covers exposed surfaces and body cavities
       • Connective: protects, supports, and binds structures and organs
       • Muscle: provides movement
       • Nervous: conducts nerve impulses for communication
       • Organ: two or more tissues that perform specific function
         • Organism: all body systems working together