Presentation is loading. Please wait.

Presentation is loading. Please wait.

CELLS AND THEIR ENVIRONMENTS

Published byFrederick Miles Modified over 5 years ago

Similar presentations

Presentation on theme: "CELLS AND THEIR ENVIRONMENTS"— Presentation transcript:

1 CELLS AND THEIR ENVIRONMENTS
OSMOSIS CELLS AND THEIR ENVIRONMENTS

2 DIFFUSION The random movement of particles.

3 DIFFUSION IS.... Particles move from greater concentration to lesser concentration or from great % to less %

4 CONCENTRATION GRADIENT (%HI -> %LOW) EQUILIBRIUM
KEY WORDS OF DIFFUSION PASSIVE TRANSPORT CONCENTRATION GRADIENT (%HI -> %LOW) EQUILIBRIUM

5 WHAT IS OSMOSIS???? Osmosis is the movement of water across a differentially permeable membrane.

6 WHAT CONDITIONS CAUSE OSMOSIS????
HYPOTONIC------ISOTONIC------HYPERTONIC

7 HYPOTONIC: Water moves INTO the cell (like blowing up a balloon)
ISOTONIC: water moves both directions HYPERTONIC: water moves out of the cell (dehydration)

8 Passive transport does NOT require energy by the cell
osmosis & diffusion facilitated diffusion

9 Ion (gated) channels

10 ACTIVE TRANSPORT CARRIER MOLECULES: cell energy required!

11 Endocytosis = cell eating

12 Exocytosis = cell EXCRETING

Download ppt "CELLS AND THEIR ENVIRONMENTS"

Similar presentations

MOVING MATERIALS INTO AND OUT OF CELLS

MOVING MATERIALS INTO AND OUT OF CELLS
Cells and Their Environment

Cells and Their Environment
Structure and Function

Structure and Function
Cells and Their Environment

Cells and Their Environment
Movement of particles across the cell membrane without using energy

Movement of particles across the cell membrane without using energy
Passive Transport Section 4.1.

Passive Transport Section 4.1.
Cell Transport Osmosis and Diffusion.  Particles in constant motion  Run into each other and randomly spread out  Particles move from an area of high.

Cell Transport Osmosis and Diffusion.  Particles in constant motion  Run into each other and randomly spread out  Particles move from an area of high.
Facilitated Diffusion Active Transport

Facilitated Diffusion Active Transport
Chapter 3. Passive Transport  Diffusion – molecules move spontaneously (no energy used) from an area of high concentration to an area of low concentration.

Chapter 3. Passive Transport  Diffusion – molecules move spontaneously (no energy used) from an area of high concentration to an area of low concentration.
Cellular Transport. I. General A. Definition = molecules moving across the cell membrane B. Cell Membrane is selectively permeable (lets some things in,

Cellular Transport. I. General A. Definition = molecules moving across the cell membrane B. Cell Membrane is selectively permeable (lets some things in,
Types of Transport Review. The movement of particles against the direction of diffusion requiring cell energy. ACTIVE TRANSPORT.

Types of Transport Review. The movement of particles against the direction of diffusion requiring cell energy. ACTIVE TRANSPORT.
Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.

Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.
Movement of Materials Through The Cell Membrane For a cell to maintain its internal environment, (i.e., achieve homeostasis) it has to be selective in.

Movement of Materials Through The Cell Membrane For a cell to maintain its internal environment, (i.e., achieve homeostasis) it has to be selective in.
Diffusion & Osmosis. Cell exist in a constantly changing environment. Homeostasis: Biological balance, or stability that a cell maintains with its environment.

Diffusion & Osmosis. Cell exist in a constantly changing environment. Homeostasis: Biological balance, or stability that a cell maintains with its environment.
Passive vs. Active Transport. Passive Transport Does NOT require energy Moves substances from higher to lower concentration.

Passive vs. Active Transport. Passive Transport Does NOT require energy Moves substances from higher to lower concentration.
Passive vs Active Transport Osmosis, Diffusion, and Energy.

Passive vs Active Transport Osmosis, Diffusion, and Energy.
Transport. Concentration Gradient If there is a concentration gradient, movement will occur After concentrations are equal= dynamic equilibrium – Dynamic.

Transport. Concentration Gradient If there is a concentration gradient, movement will occur After concentrations are equal= dynamic equilibrium – Dynamic.
Cellular Transport: movement of materials in and out of a cell  Homeostasis: combination of two words  Homeo = same  Stasis = steady  Homeostasis:

Cellular Transport: movement of materials in and out of a cell  Homeostasis: combination of two words  Homeo = same  Stasis = steady  Homeostasis:
Osmosis & Diffusion. Diffusion *The movement of molecules from an area of HIGH concentration to an area of LOW concentration.

Osmosis & Diffusion. Diffusion *The movement of molecules from an area of HIGH concentration to an area of LOW concentration.
 Cell transport is the movement of particles and it takes place because cells are trying to maintain balance (homeostasis).

 Cell transport is the movement of particles and it takes place because cells are trying to maintain balance (homeostasis).

Similar presentations

Ads by Google