A & P EXAM #1 Flashcards
Anatomy
Study of the body’s structure
Physiology
study of the body’s function
Atom
Smallest Unit of matter.
Made up of subatomic particles (protons, neutrons, and electrons).
Molecule
Two or more atoms combined.
Chemical building blocks of all body structures.
Compound
substance composed of two or more different elements joined by chemical bonds
Tissue
A group of many similar cells that work together to perform a specific function
Organ
anatomically distinct structure of the body composed of two or more tissues that work together to perform a specific(s) function
Organ System
group of organs that work together to perform major functions or meet physiological needs of the body.
Homeostasis
State of steady internal conditions maintained by living things
Positive Feedback Loop
intensifies a change in the body’s physiological condition. Deviation from the normal range resulting in more change , and the system moves farther away from the normal range
Negative Feedback Loop
reverses a deviation from the set point and then returns to normal range
Ion
atom with an overall positive or negative charge
Acid
compound that releases hydrogen ions in solution(s)
Base
Compound that accepts hydrogen ions in solution(s)
Active Transport
Movement of substances across the membrane using energy from ATP
Passive Transport
the movement of substance across a membrane without ATP
Selectively Permeable Membrane
Membrane that allows only substances meeting certain criteria to pass through
Brownian Movement
erratic random movement of microscopic particles in a fluid,
Solvent
dissolver
Solute
dissolved substsance
Solution
solvent and solute combined
Concentration Gradient
The difference in concentration of a substance across a space
Saturation
the degree or extent to which something is dissolved or absorbed compared with the maximum possible, usually expressed as a percentage.
Hypotonic Solution
describes a solution concentration that is lower than reference concentration