general intro Flashcards
5 functions of living things
responsiveness growth reproduction movement metabolism
gross anatomy
(macroscopic anatomy) features visible with naked eye - surface, regional, systemic
microscopic anatomy
visible with magnification
cytology
study of internal structure of cells
histology
study of tissues of various organs
anatomy
internal/external structures and their physical relationships
physiology
how each structure works individually and as a whole
cell physiology
study of function of living cells
special physiology
study of physiology of specific organs
systemic physiology
study of specific organ system
pathology
study of causes of diseases and effects on organs or organ systems
homeostasis
stable internal environment
homeostasis regulation
body constantly makes adjustments to maintain this
receptor
sensitive to certain stimulus
control center
intercepts the info from the receptor
effector
responds and opposes or reinforces the stimulus
negative feedback
a stimulus produces a response that opposes the original stimulus
positive feedback
initial stimulus produces response which reinforces stimulus
accelerates proves that must proceed rapidly - ex: childbirth, blood clotting
x rays (roentgenogram)
radio-opaque (white) areas are dense tissue like bone and tendons. radio-translucent areas (dark) are soft or air or fluid filled spaces
best used on dense or hard structures
CT scan
(computer axial tomography) 1 x ray source rotates around body and is picked up by computer sensor
shows soft tissues in transverse sections
MRI
(magnetic resonance imaging) very strong magestic field (3000 times of earth) aligns the particles of your atoms - radio waves are then shot at you and different tissues absorb different amounts which creates a picture
LOTS of soft tissue detail
PET
(positron emission tomography) patient is injection with radioisotope tagged glucose - scan localized glucose as it is used by body - bright spots indicate high metabolic activity
ultrasound
transmitter blasts narrow burrs of high frequency sound which bounces off organs and creates an echo gram