ISU BSC 181 - Exam 1 Study Guide (5 pages)

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Exam 1 Study Guide



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Exam 1 Study Guide

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Pages:
5
Type:
Study Guide
School:
Illinois State University
Course:
Bsc 181 - Human Physiology and Anatomy I

Unformatted text preview:

BSC 181 1st Edition Exam 1 Study Guide All body functions are spread among the different organ systems All of which cooperate and work together to keep the cells functioning and alive Receptor sensor monitors environment senses change responds to stimuli Control Center receives input from receptor determines appropriate response Effector receives output from control center provides means to respond response either reduces negative feedback or enhances positive feedback stimulus Some structures that can be an effector are muscles smooth cardiac and skeletal and glands Negative feedback most common response either reduces or shuts off original stimulus variable changes in opposite direction of initial change Positive feedback cascade or amplifying effect response enhances or exaggerates original stimulus Anatomical Positioning Axial head neck trunk Appendicular limbs Saggital Divides body vertically into right and left parts Frontal coronal Divides body vertically into anterior and posterior parts Transverse horizontal Divides body horizontally 90 to vertical plane into superior and inferior parts Dorsal Body Cavity back cranial and vertebral cavity Ventral Body Cavity front houses internal organs Thoracic cavity lungs merdiastinum pericardial Abdominopelvic cavity abdominal stomach intestines spleen liver pelvic bladder reproductive organs rectum Atomic Structures Nucleus almost entire mass of atom contains protons and neutrons Protons positive charge 1 amu Neutron no charge 1 amu Electron negative charge same amount in atom as protons in orbitals in electron cloud 1 2000 mass of a proton Valence shell outermost electron shell most potential energy most chemically reactive Atomic weight average mass numbers of all isotopes of an atom Atomic mass total number of protons and neutrons Atomic number number of protons Ions atom gains or loses electrons and becomes charged number of protons stays the same anion if negative cation if positive The different between and ion



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