the body stuff Flashcards
negative feedback
when some variable sets a counteracting response in order to come back to a set point. maintains homeostasis
positive feedback
the variable is being amplified
homeostasis
same state or steady state maintaining a stable internal environment despite changes in external surroundings
set point
normal value for the controlled variable
sensor
monitors the level or activity of a variiable
integrator
compares signals from sensor and set point
effector
compensates for any deviation between the actual value and the set point
connective tissue (connect things)
structure: blood, adipose, bone, and cartilage
function: connect, surround, anchor and support attatchemnt, strength, and communication between cells
epithelial tissue
structure: a sheet of densely packed epithelial cells that cover organs or and body
function: protection and secrete and absorb ions and organic molecules
muscle tissue
strucutre: bundles of muscle fibers
function: is to contract or generate force for a body movement
nervous tissue
structure: composed of complex networks of nuerons
function: receives, generate, and conducts electrical signals from one part of the animals body to another part
Circulatory System
components: vessels, heart, blood vessels, blood, or hemolymph
function: transport and distribute solutes to multiple parts of an organisms body
Immune and Lymphatic System
components: white blood (Luekocytes), lymph organs, lymph vessels, and nodes
function: help protect body from pathogens
Nervous system
components: the brain, spinal cord, PNS, CNS,
FUNCTION: regulates and coordinates movement, sensation, organ function
Respiratory System
COMPONENTS: gills, skin, trachea, and lungs
Function: exchanges oxygen and CO2 with the enviorment; regulated blood
SENSORY NUERONS
carries impulses from the receptor to the cns (brain or spinal cord)
