The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.
Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are "recognized" by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.
Projections that allow the cell to move or moves substances along the surface of the cell. Ciliamoves fluids along a cells surface.
Membrane-bound vessicles.
Transport protein
vesicles in the cell membrane
vesicles in the cell membrane
Cilia
cilia
The endoplasmic reticulum moves substances through the cell within channels made of membranes. The cytoplasm also moves substances and organelles through cytoplasmic streaming
The cell membrane
golgi appratus
The Cytoplasm moves things in a cell
Cilia
cilia
Diffusion ,osmosis
The endoplasmic reticulum moves substances through the cell within channels made of membranes. The cytoplasm also moves substances and organelles through cytoplasmic streaming
Active transportation is the material that across plasma membrane. This makes it flow one way.
rolling motion occurs when a round surface (cylinder, wheel, ball) is rotating as it moves in a given direction across a surfaceslipping motion occurs when a round surface (cylinder, wheel, ball) is not rotating but sliding as it moves in a given direction across a surface
concentration gradient moves from high to low until equilibrium is reached.
Water always flow from a higher elevation to a lower elevation.
When you make a wave on a rope, the wave moves from one end of the rope to the other. But the rope itself moves up and down or from side to side, at right angles to the direction in which the wave travels. Waves that move the medium at right angles to the direction in which the waves travel are called transverse waves. Transverse means "across". As a transverse wave moves, the particles of the medium move across, or at right angle to, the direction of the wave.
Peristalsis moves food in one direction.
waves in which matter in the medium moves on the same direction as the wave are called?