Chapter 1 (Intro to Anatomy) Flashcards
protons, neutrons, electrons
Subatomic Particles
simplest complete unit of an element
Atom
2 or more atoms
Molecule
many small molecules into one large
Macromolecule
structure within a cell that performs a specialized function
Organelle
Basic unit of structure and function in an organism
Cell
group of cells which work as a unit to carry out a specialized function
Tissue
structure made of 2 or more tissue types that work together to carry out a specialized function
Organ
collection of organs that act together to carry out related body activities
Organ system
individual living thing made up of organ systems
Organism
break down molecules into smaller units and releases energy
Metabolism (Catabolic)
construct molecules from smaller units, requires energy
Metabolism (Anabolic)
moving substances across membranes
Absorption
moving substances throughout the body
Circulation
changing substances into forms that chemically different from the orginal
Assimilation
needed for energy, provides raw materials for building new living matter
Nutrients/Food
inhaling oxygen for cellular respiration and exhaling carbon dioxide waste
Breathing
measure of amount of heat present
Normal body temperature
hydrostatic pressure exerted by the blood on the vessels as the heart pumps
Blood pressure
expansion and recoil of an artery as the heart pumps blood
Pulse
form of energy, product of metabolism
Heat
air pressure used for breathing and hydrostatic pressure helps blood movement
Atmospheric pressure
ability to maintain constant internal enviroment
Homeostasis
built in control mechanisms
How does body maintain homeostasis?
body communicates through receptors (stimuli) then directs it towards the control center (set point, goal) which in turn controls the effector (muscle/gland)
Control Mechanisms
depresses stimulus, self-limiting reactions, prevents change from going too far
Negative feedback
enhances stimulus, promotes itself, can get out of control and produce unstable conditions
Positive feedback
Study of the structure of body parts and their relationships to one another
What is anatomy?
Study of the function of living organisms
What is physiology?
Subatomic Particles, Atoms, Molecules, Macromolecules, Organelles, Cells, Tissues, Organs, Organ Systems, Organism
Levels of Organization (from simple to complex)