Ch 3 Cells Flashcards
Cells
Basic unit of life
Sex cells / germ cells
F- ovium
M - spetmatoza
Somatic cells
All cells in body other than sex cells
Structure of the cell
Practice labeling the cell
Plasma membrane
Outer covering of the cell
Made of phoslipids
Controls what enters and leaves the cell
Semipermable membrane
This means small molecules can pass freely w/o using energy or transport
3 ways substances can be moved across the membrane without using energy
Diffusion
Osmosis
Filtration
Diffusion
The constant movement of molecules from an area on of high concentration to an area of low concentration
(Through semipermeable membrane)
Facilitated diffusion uses a ______
Transport
Osmosis
Diffusion of water
Constant movement of water from an area of low concentration to an area of high concentration to an area of low concentration
Filtration
Water passage w/ dissolved material through a membrane using FORCE
Until equilibrium is reached particle continue
To be in motion
Movement across the cell membrane that requires use of cellular energy in the for, of atp
Active transport
Endocytosis
Active transport
Molecules are too big or complex to freely pass so they attach to a transporter on the cell membrane to be brought in
Endocytosis
The cell engulfs
Phagocytosis
Engulfs large particles
Pinocytosis
Engulfs small droplets of fluid
Exocytosis
Movement of material out of the cell (vesicle)
Hypertonic solution
When the extracellular fluid more concentrated than the Intracellular fluid
Water would try to leave & cell shrinks up (crenate)
Hypotonic solution
The extracellular fluid has less concentration than the Intracellular fluid
Molecules rush into cell due to osmosis causing cell to burst
Isotonic solution
The Intracellular fluid & extracellular fluid have the same concentration
Cancer & risk factors
Genetic mutation in cells
Hereditary chemicals radiation obesity physical activity poor nutrition different viruses and infectious agents
