Category 1
the smallest structural and functional unit of a living thing
cell
the ability of the body to maintain a relatively stable internal state despite changes in the environment
homeostasis
a living thing
organism
"always a little change"
dynamic equilibrium
a group of similar cells that work together to carry out a special job
tissue
causes a change
stimulus
interprets a message and decides how to respond
control center
detects a change and sends a message
receptor/sensor
a group of organs that work together to do a certain job
organ system
a group of tissues that work together to do a job
organ
when a change triggers a counteracting response in order to get back to some set point
negative feedback
the study of relationships between living things and their surroundings
ecology
responds to counter a change
effector
the study of the functions of living things (how the different processes work)
physiology
the study of very small things
microbiology