M1: Intro to Anat and Phys Flashcards
Anatomy
the study of the structures in the body and its parts
Physiology
The study of the functions of an organism and its parts
Gross anatomy
the study of the macroscopic structures of an organism
microscopic anatomy
the study of structures so small you need a microscope
Histology
the study of tissues
organ
a group of tissues specialized to a particular function
Tissues
groups of cells forming various building materials of the body
Homeostasis
a state of dynamic equilibrium in the body with respect to its internal environment and functions
set point
ideal normal value of a variables around which homeostasis is maintained through a normal range of values that are acceptable to the body
Stress
a factor that causes one or more physiological variables to move away from its homeostatic set point
control center
the part of the body, either central nervous system or endocrine gland, that receives information about a variable, determines the set point signal a response to a correct imbalance
effector
a structure in the body that can change the value of a variable in response to a signal from the control center
receptor
a structure in the body that monitors the values of your body’s variables
Negative Feedback System
a control mechanism consisting of receptors, control center, and effectors through which homeostasis in the body is maintained by regulation of the body/s organ systems. It is called negative feedback because the control system opposes of reverses the original stress
selective permiability
the ability to let certain materials in or out while restricting others