Science cells flashcard
Flexible covering that protects the inside of the cell from the environment outside of a cell
Cell membrane
A stiff structure outside the cell membrane
Cell wall
A fluid inside a cell that contains salt and other molecules
Cytoplasm
A network of threadlike proteins that are joined together
Cytoskeleton
Specialized function
Organelles
The part of a eukaryotic cell that directs cell activities and contains genetic material
Nucleus
A membrane bound organelle that uses light energy and makes food
Chloroplast
Movement of substances through a cell membrane without using the cells energy
Passive transport
Movement of substances, from an area of higher concentration, to one of a lower concentration
Diffusion
The diffusion of water molecules only through a membrane
Osmosis
When molecules passed through a cell membrane using special proteins, called transport proteins
Facilitated diffusion
Movement of substances, through a cell membrane only by using the cells energy
Active transport
Process during which a cell takes in a substance by surrounding it with the cell membrane
Endocytosis
The process during which of cells vesicles release their contents outside the cell
Exocytosis
A series of chemical reactions that convert the energy and food molecules into a usable form of energy called ATP
Cellular respiration
