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14 terms

7th Grade Science Cell Quiz

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cytoplasm
clear, gel like substance inside the cell that is constantly moving
cell membrane
the outside boundary that separates the cell from its environment. It allows materials to move in and out of the cell.
cell wall
found only in plant cells, gives cell its rigid boxlike shape, supports and protects the cell
nucleus
large oval structure that directs the cell's activities. It acts as the "brain" of the cell.
endoplasmic reticulum
looks like a maze of passageways, moves protein and other materials around in the cell
ribosomes
attached to the endoplasmic reticulum, these small grains make proteins
mitochondria
rod or bean shaped structures that are called "powerhouse" because they generate energy for the cell. Muscle cells have lots of mitrochondria.
golgi body
looks like flattened sacs and tubes, they package and secrete (move) substances to other parts of the cell. It is referred to as the "mail room".
Chromatin
thin strands floating in the nucleus, hold genetic or instructions for the cell
nucleolus
small object floating in the nucleus that makes ribosomes
organelles
found in the cytoplasm, parts of the cell that act like organs in a body
vacuoles
large in plant cells, small or missing in some animal cells, they store water, food, waste, and other materials
lysosomes
small round objects in animal cells that contain chemicals to break down food, digest wates, and worn out cell parts
chloroplasts
found only in plant cells, green objects that capture energy from sunlight to produce food