Cells
The basic structural and functional unit of living organisms
What is a cell?
What a plant or animal does
What is behavior?
A nerve ending that sends signals to the central nervous system when it is stimulated
What is a sensory receptor?
A mass of similar cells that perform a specialized function
What is tissue?
The basic physical and functional unit of heredity made up of DNA
What is a gene?
A category of organisms made up of one cell
What is unicellular?
The process by which organisms produce more of their own kind
What is reproduction?
An action or condition that provokes a response
What is a stimulus?
A collection of similar tissues joined together into a structure that performs specialized functions
What are organs?
A version of a gene
What is an allele?
A structure inside a cell that performs a specialized function
What is an organelle?
A self-contained living thing
What is an organism?
A chemical that enters the body
What is chemical input?
This organ system's main function is to break food into small enough pieces for the body to use.
What is the digestive system?
A single, highly organized and structured piece of DNA
What is a chromosome?
The organelle that functions in energy production
What are mitochondrion?
The ability of a system to do work
What is energy?
Signals that enter the body through physical touch or vibration
What is mechanical input?
This organ system includes the heart, blood, and blood vessels.
What is the circulatory system?
A change or damage in the DNA that permanently alters the genetic message that the gene carries
What is a mutation?
A lipid barrier that encloses the cytoplasm and controls what enters and exits the cell
What is the cell membrane?
A chemical reaction during which plants convert radiant energy from the Sun to chemical energy; the reaction converts carbon dioxide and water into sugar (glucose) and oxygen
What is photosynthesis?
Signals that enter the body in the form of electromagnetic stimuli
What is electromagnetic input?
This is the level of order (hierarchy) for bodies and systems from least complex to most complex.
What is cell, tissue, organ, organ system, and organism (body)?
Biomolecules made up of amino acids and found in all living cells that perform bodily functions
What are proteins?