Bio 201- Chapter One Need to Knows

Gradient

A difference in chemical concentration, electrical charge, physical pressure, temperature, or other variable between one point and another is a physiological_______

Molecule

A structure that is made up of two or more atoms is called a

Tissue

An aggregation of cells and extracellular materials, which perform a discrete function, is known as a

An Effector

Cell or organ that carries out corrective behavior/ response to a stimulus

Stimuli

Changes in the environment, to which organisms respond, are called

The integration center of a feedback mechanism

Processes information, relates it to other information, and makes a decision of what a response should be.

Plasma Membrane

Structure that encloses a human cell and controls the traffic of molecules in and out of the cell.

Excitability

The ability of nerve and muscle cells to produce quick reactions.

Receptor

The name for a structure that is specialized to detect a stimulus is a

Atom

The smallest particle with a unique chemical identity

Independently verified

To be considered a scientific fact, information must be

Organ

What is an anatomical structure that is composed of at least two different tissue types, has recognizable structural boundaries, and has a discrete function different from the structures around it called?