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7 Unit 2 vocab

Unit 2 vocab 7th grade

TermDefinition
algae eukaryotic organisms that contain chlorophyll and live in water; can be single-celled or multicellular
element a substance that cannot be separated into simpler substances by chemical means
eukaryote an organism with a cell type that contains specialized organelles in the cytoplasm and membrane bound nucleus. Has a nucleus!
function the action or role of a person, thing, or institution; the purpose for which something is designed or exists.
organelle a specialized part or organ within the cytoplasm of a cell; has a specific function.
organism a form of life composed of many different parts that work together and maintain various vital processes.
prokaryote an organism whose cells have NO defined nuclei and no organelles in the cytoplasm. (except ribosomes)
cell the tiniest part of an organism that is considered alive is the cell
mitochondria long, sausage shaped organelles made of two membranes; turn sugar into energy
nerve cells the messengers of the body; neurons
endoplasmic reticulum large, folded membranes that connect the nucleus to the cell membrane and carry messages from the nucleus to the other parts of the cell
ribosomes round organelles that build helpful proteins
Golgi Bodies process and package proteins before sending them to their destinations
organelles specialized parts or organs within the cytoplasm of a cell
vacuoles bubble like containers that store materials; hold large amounts of starch, water, and sugar that plants need to grow
chloroplasts found only in plant cells; filled with chlorophyll that uses energy from sunlight to make food
red blood cells carry oxygen to the rest of the cells throughout the body
function the action or role of a person, thing, or institution; the purpose for which something is designed or exists
animalcule an extremely small or microscopic animal nearly or completely invisible to the naked eye
beam a ray or group of rays, as from a beacon
magnify to increase the apparent size of, as a lens does
lens a curved piece of glass that gathers light and magnifies the object
objective lens the lens closest to the viewing platform
slide clear glass where the object is placed
coverslip keeps the object in position
eyepiece lens the lens through which a person looks; at the top of the microscope
adjustment knobs help put the object in focus
diaphragm controls how much light passes through the lens
cellular respiration the process by which cells use glucose (sugar) and oxygen to gain energy
centriole a small, cylindrical cell organelle near the nucleus in the cytoplasm of most eukaryotic cells; involved in cell division
centromere a specialized region of the chromosome; appears during cell division as the central point where the two copies (strands) of DNA are held together, forming an X shape
chromosome threadlike body composed of DNA; carries genetic material
exhale to breathe out
exocytosis the transport of material out of a cell by means of a vesicle that engulfs the material and releases it through an opening in the cell membrane
meiosis the reproduction of sex cells; parent cell divides twice to create four new cells
mitosis the process of eukaryotic cell division
immune system a large group of white blood cells that fight disease in a human or animal
Created by: Hillerywest