Life, Cell Theory, Cell Structures and Functions
cell structures and functions
Terms in this set (29)
the basic unit of structure and function in a living organism
barrier between the cytoplasm and the environment outside the cell, controlling what comes in and out of the cell — "security"
stiff boxlike shape wall surrounding the membrane and providing support — plant only
captures the sun's energy and produce food for plants through photosynthesis — plant only
gel-like fluid in which the organelles that make up the cell are suspended in
network of passageways that carry materials from one part of the cell to another — rough and smooth
receives materials from the ER and send to other parts of the cell, as well as releasing materials outside of the cell — "UPS"
contain chemicals that assist in breaking down food particles and worn-out cell parts — "disposal" — animal only
rod-shaped organelles that produce energy for the cell — "powerhouse"
directs all of the cell's activities, including reproduction — "brain"
inside the nucleus, where ribosomes are made
found attached to the rough ER and floating in the cytoplasm — "protein factories"
where water, food, waste, and other materials are stored in the cell [animals have several while mature plants usually have one large sac] — "storage center"
is a widely accepted explanation of the relationship between cells and living things — all living things are composed of cells, cells are the basic units of structure and function, and all cells are produced from other cells
an instrument that makes small objects look larger — ex. light and electron beam
tiny structures that carry out specific functions within the cell
single-celled organisms [including bacteria] — uni [one]
composed of many cells — multi [many]
a change in an organism's surroundings that causes the organism to react — ex. predator approaching
an action or change in behavior that results from reacting to a stimulus — ex. change in color to blend in
process of change that occurs during an organism's life to produce a more complex organism
mistaken idea that living things arise from nonliving sources
organisms that make their own food — producer
organisms that cannot make their own food — they consume autotrophs or other heterotrophs — consumer
the maintenance of stable internal conditions despite changes in surroundings
6 characteristics of living things
cellular organization, contain similar chemicals, use energy, respond to their surroundings, grow and develop, and reproduce
4 basic survival needs
food, water, living space, and stable internal conditions
how living things arise from other living things
involved in cell division — animal only