random bio Flashcards
cell membrane
allows the cell to change its shape, controls the moving of materials in and out of the cell
cell wall
gives the cell its shape. plants, fungi, most bacteria, and some protists have a cell wall, animal cells DO NOT.
Nucleus
found at the center of the cell, contains DNA, which controls cellular function
Chloroplasts
capture solar energy for photosynthesis
Golgi bodies
modify, sort, and ship proteins and lipids
Mitochondria
turns food into energy (ATP)
Ribosomes
makes protein to be used by an organism
homeostasis
the balance of materials entering and exiting the cell.
passive transport
the movement of materials across the cell membrane without the use of the cell’s energy.
Diffusion
the movement of substances across the cell membrane from an area of high concentration to an area of lower concentration
osmosis
the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell’s partially permeable membrane.
Facilitated transport (Facilitated diffusion)
occurs when a carrier molecule embedded in the cell membrane transports a substance across the membrane by means of diffusion
Active transport
a process that drives large molecules across the cell membrane from a region of lower concentration to a region of higher concentration
Endocytosis
a process in which a cell surrounds and takes in material from its environment
Exocytosis
a process by which a cell surrounds and removes materials from inside the cell
