10/29/2024 Test Flashcards
Cells
the basic building blocks of all living things.
Animalcules
a very small organism that is invisible or nearly invisible to the naked eye.
Prokaryote
organisms whose cells lack a nucleus and other organelles
Eukaryote
an organism whose cells contain a nucleus within a membrane.
Cell Wall
the protective, semi-permeable outer layer of a plant cell.
Chromatin
a mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms
Chromosomes
A structure found inside the nucleus of a cell.
Nucleolus
An area inside the nucleus of a cell that is made up of RNA and proteins and is where ribosomes are made.
Nuclear Envelope
the two-layered membrane that surrounds the nucleus and separates it from the other cell organelles
Porous
has many small holes, so liquid or air can pass through, especially slowly
Cytoskeleton
The large network consisting of protein fibers and other molecules that gives shape and structure to cells in the body
Microtubules
A narrow, hollow tube-like structure found in the cytoplasm (the fluid inside a cell) of plant and animal cells.
Microfilaments
protein filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton
intermediate filaments
a type of cytoskeletal component found in eukaryotic cells that have a diameter of around 8-10 nm.
cilia
small, slender, hair-like structures present on the surface of all mammalian cells
flagella
microscopic hair-like structures involved in the locomotion of a cell.
ribosomes
a structure found inside cells that is involved in making proteins. Ribosomes help link amino acids together to form proteins.
endoplasmic reticulum
a network of membranes inside a cell through which proteins and other molecules move
golgi apparatus
A stack of small flat sacs formed by membranes inside the cell’s cytoplasm
lysosomes
a membrane-bound cell organelle that contains digestive enzymes
lytic enzymes
able to hydrolyze the peptidoglycan responsible for the rigidity of the bacterial cell wall
vacuoles
storage areas for cells and important cell parts. Inside a membrane, or thin outer layer, they store water, food, waste, and other things for the cell. Animal cells have many small vacuoles, while plant cells have large vacuoles that store water.
vesicles
small cellular containers that perform a variety of functions
chloroplasts
small, but critical structures inside of plant cells