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45 Cards in this Set

  • Front
  • Back
What is tissue?
a group of similar cells that work together to perform a specific job in the body.
Define organ.
a combination of two or more tissues that work together to perform a specific function in the body.
What is an organ system?
a group of organs that works together to perform body functions.
Define organism.
anything that can independently carry out life processes.
Define unicellular.
made of a single cell.
Define multicellular.
made of many cells.
What is a population?
a group of individuals of the same species that live together in the same area at the same time.
What is a community?
all of the populations of different species that live and interact in an area.
Explain ecosystem.
a community of organisms and their nonliving environment
Define cell membrane.
a phospholipid layer that covers a cells surface and acts as a barrier between the inside of a cell and the cells environment.
What are organelles?
a structure within a cell sometimes surrounded by a membrane.
Wht is cytoplasm?
cellular fluid surrounding a cells organelles.
What is a nucleus?
the membrane-coverd organelle foundin eckaryotic cells contains the cells DAN and serves as a control center for the cell.
What is prokaryotic?
a cell that does not have s nucleus or any other memebrane-coverd organelles; also called a bacterium.
What is eukaryotic?
a cell nthat contains a central nucleus and a complicated internal structure
Define bacteria.
extremely small single-celled organisms without a nucleus; prokaryotic cells.
What is a cell wall?
a structure that surrounds the cell membrane of some cells and provides strength and suport to the cell membrane.
What is a ribosome?
a small organelle in cells where proteins are made from amino acids.
What is the endoplasmic reticulum?
a membrane-coverd cell organelle that produces lipids, brakes down drug and other substances, and packages proteins for delivery out of the cell.
Define mitochondria
cell organelles surrounded by two membrane that breaks down food molecules to make ATP.
What is chloroplast?
an organelle found in plant and algae cell where photosynthesis occurs.
What is the Golgi complex?
the cell organelle that modifies packages and transport materials out of the cell.
Define vesicle.
a membrane-covered compartment in a eukaryotic cell that forms when part of the cell membrane surrounds an object anf pinches off.
Define vacuole.
a large membrane-covered structure found in plant cells that serves as a storage container for water and other liquids.
Define lysosome.
a special vesicle in a cell that digests food particles, wastes, and foreign invaders.
What is diffusion?
the movement of paticles from an area where their concentration is high to an area where their concentration in low.
What is osmosis?
the diffusion of water across a cell membrane.
What is passive transport?
the diffusion of particles through proteins in the cell membrane from areas where the concentration of particles is high to areas where the concentration of particles is low.
What is active transport?
the movement of particles through proteins in the cell membrane against the direction of diffusion; requires cells to use energy
Define edocytosis.
the process in which a cell membrane surrounds a particle and encloses it in a vesicle to bring it into the cell.
the process used to remove large particles from a cell; during exocytosis, a vesicle containing the particles fuses with the cell membrane.
Which of the following is not found in animal cells?
cell wall, lysosomes, cell membrane, or vesicle
cell wall
Different ________ work together in an organ.
organ systems, tissues, organisms, or prokaryotes
The scientist who said that all cells come from cells was named?
Schleiden said that all plants parts are made up of what?
A German scientist named___________ said all organisms are made of one or more cells and the cell is the basic unit of life in all living things?
Leeuwenhoek used one of his own handmade microscopes to get a closer look at pond scum. He was the first to see_______
Hooke, a British scientist, was important because he saw cells first, but he described them as....
tiny little boxes
What are the three parts of cell theory?
all organisms are made of 1 or more cells
the cell is the basic unit of life
all cells come from existing cells
Where are vesicles formed?
the endoplasmic reticulum or the Golgi complex
What DNA?
a hereditary material that controls all the activities of a cell, contains the information to make new cells and provides instructions for making proteins.
What is the first level of the division of labor?
List three examples of tissues found in your body.
muscle cells, blood cells, fat cells
what is the difference between multicellular and unicellular organisms?
multi- many cells that cannot live on their own
uni- a single cell that can live on its own
Name three types of organ systems in your body.
Digestive systems, Skeletal systems, excretory system