Cell Membrane or Plasma Membrane
semipermeable...selective about what can enter or leave the cell...allow lipid soluble to go through...made up of protein,phospholipids
gel-like substance found inside the cell but out side the nucleus. surrounds and supports organelles;medium through which nutrients and waste move
Control center of the cell...contains genetic information.DNA ..large pores, allow free movement of protien to ATP
tiny, slipper-shaped organells. convert energy in nutrients to ATP (power plant of cell)
double layered, surrounds the nucleus..contains large pores that allow free movement of certain substances(genetic material), to come out when it's time for replication. between the nucleus and the cytoplasm,,
substance that fills the nucleus. contas two other structures 1 nucleolus (little nucleus), and chromatin, which are threadlike structures that contain genes
moving from high to low concentration...reaching equilibrium ex..food coloring in glass...area around the die, diffusing, making all the water, equal pink
only applys to water, water enters the semipermeable membrane, Water passes from less concentrated to more concentrated..reaching a state of equilibrium.
Active transport pumps
ACTIVE TRANSPORT MECHANISM movement of a substance uphill, from low to high concentration Requires input of energy (ATP)
(plain water) water moves into RBC, causing the RBC to burst Water is more dilute than RBC so...water moves into RBC, BURST OSMOSIS ONLY WATER MOVES
(concentrated solution) RBC shrinks because the SOLUTION is more concentrated than the RBC so the water from the RBC goes to the solution (equilibrium) and the RBC Shrinks
unlike diffusin and osmosis, water and dissolved substances cross the membrane is response to defferences in PRESSURE, pressure PUSHES substance accross the membrane
4 phases...prophase, metaphase, anaphase, and telophase. exact replica being produced, same DNA ..Same chromosomes invoved in bodily repair and growth..ex..cut healing. .splitting of one mother cell into two IDENTICAL ("daughter cells)
final preparatory phase for cell division (mitosis)...synthesis of enzymes and protein needed for misosis....then enters Mitotic (M) phase.
have the ability to differentiate..Embryonic, Adult and Placenta/umbilical...some go to the nerves to become nerve cells, some go to bones to become bone cells etc.
cells shrink due to hypertonic. water from cell goes into concentrated solution to become equal