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Homeostasis and Cell TransportVocabulary Review Homeostasis and Cell Transport
The movement of substances across a cell membrane without any input of energyPassive Transport
The movement of molecules from an area of higher concentration to an area of lower concentrationDiffusion
The difference in the concentration of molecules across a distanceConcentration gradient
Concentration of molecules is the same throughout the space the molecules occupyEquilibrium
Movement of water molecules from high concentration to low concentrationOsmosis
Concentration of solute molecules outside the cell is LOWER than in the cytosol; water diffuses into the cell Hypotonic
Concentration of solute molecules outside the cell is HIGHER than in the cytosol; water diffuses out of the cell Hypertonic
Concentrations of solutes outside and inside the cell are equalIsotonic
Organelles that remove water through contractionContractile Vacuoles
The pressure that water molecules exert against the cell wallTurgor pressure
The shrinking of a cell due to water’s moving out the cell when placed in a hypertonic environmentPlasmolysis
The swelling and eventual bursting of a cell as water moves into it when placed in a hypotonic environment Cytolysis
Facilitated DiffusionThe movement of substances across a cell membrane with the assistance of protein carriers Facilitated Diffusion
The proteins that move certain molecules into the cell that cannot readily diffuse through the cell membrane Carrier Proteins
A complex of protein molecules in a cell membrane that form a pore through which ions can passIon Channels
The movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires energy Active Transport
Sodium-Potassium PumpA carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell Sodium-Potassium Pump
The process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell Endocytosis
Small cavity or sac that contains materials; forms when part of the membrane surrounds the materials to be taken into or out of the cell Vesicle
A method of active transport across the cell membrane in which the cell takes in extracellular fluids Pinocytosis
The process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food Phagocytosis
A cell that ingests and destroys (digests) foreign matter or microorganismsPhagocyte
The process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out Exocytosis
Cells and Their Environment
Welcome to Mrs. Vera’s biology review. Topic 1.
Homeostasis and Transport
Chapter 5 Table of Contents Section 1 Passive Transport
Cell Theory O Three Parts O All living things are made up of one or more cells O Cells are the basic units of structure and function O All cells arise.
Transport VOCAB ONLY. An INTEGRAL MEMBRANE PROTEIN that moves molecules PASSIVELY across cell membranes by attaching, CHANGING SHAPE, and flipping to.
#1 Which part of all cells is responsible for regulating which substances enter or exit the cell? a. cell wall b. nuclear membrane c. cell membrane d.
1 2 Homeostasis 3 Osmosis 4 Facilitated Diffusion.
Chapter 5 Homeostasis and Transport
Transport Passive and Active. Passive Transport Passive transport is any transport that occurs without the use of energy. Ex: Diffusion Osmosis.
Cell Membrane Transport. Cell membrane transport There are 2 types of cell membrane transport: Passive Transport Substance move from High concentration.
Moving through the Plasma Membrane. What does a phospholipid look like?
CHAPTER 5 Cell Homeostasis. Section 1: Passive Transport Cell membranes: controls what enters and leaves the cell Sometimes it takes energy to do.
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