Microscope Men Robert Hooke - 1665 Antonie von Leeuwenhoek -1675.

Slides:

Advertisements

Similar presentations

Homeostasis refers to the necessity of an organism to maintain constant or stable conditions. In order to maintain homeostasis, all organisms have processes.

Advertisements

Transport of substances across a membrane without any input of energy by the cell. a. Diffusion b. Osmosis.

A Tour of the Cell (Chapter 6).

History of Microscopy Hooke observes first cells (cork) Leeuwenhoek – animalcules (living cells) Jump to late 1830s Schleiden – plants made.

Homeostasis and Transport

Cell Structure and Function

Facilitated Diffusion Active Transport

Unit 4: The Cell & Its Environment

Passive or Active? Active Transport General Cell Stuff.

Part 3: Homeostasis and Cell Transport (Chapter 5)

Movement Through The Cell Membrane. How Things Move in and Out of the Cell The cell membrane is selectively permeable, allowing some substances, but not.

Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.

Old dead guys to add to our “Important People” chart PersonOriginTime Frame Importance Robert HookeEnglish16651 st to identify/name cells Anton van Leeuwenhoek.

Aim: How can we compare active and passive transport?

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.

Concept Cards. Section 3.1 Cell Theory (list) Hooke (1 fact) Leeuwenhoek (1 fact) Schleiden (1 fact) Schwann (1 fact) Virchow (1 fact) Prokaryotic cell.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Diffusion and Osmosis. KEY CONCEPT Materials move across membranes because of concentration differences.

Materials move across membranes because of concentration differences.

KEY CONCEPT Materials move across membranes because of concentration differences. 3.4 Diffusion and Osmosis.

Cell Processes Transport. I. Transport Cell Membrane helps maintain homeostasis by regulating what substances enter and leave the cell.

KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane. 3.5 Active Transport, Endocytosis, and Exocytosis.

Cellular Transport Molecules moving across the cell membrane Cell Membrane is selectively permeable (lets some things in, some things out, but not everything)

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Transport Across Cell Membranes

Essential Standard Bio.1.2 Analyze the cell as a living system.

Essential Standard Bio.1.2 Analyze the cell as a living system.

Notes: Cellular Transport

AIM: What is the difference between active and passive transport?

Cell Transport Important because it allows cells to maintain homeostasis.

Mechanisms of Cellular Transport Continued…

Diffusion and Osmosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

Cell Membrane: Transport What goes in? What goes out?

3.5 Active Transport, Endocytosis, and Exocytosis

Cell Structure and Function

3.5 Active Transport, Endocytosis, and Exocytosis

II. Membrane Transport Two types: Passive & Active

Double layer of phospholipids with proteins embedded

Diffusion and Osmosis.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

Cell Transport Different Methods used by Cells to Move Molecules into or out of the Cell.

3.5 Active Transport, Endocytosis, and Exocytosis

3.5 Active Transport, Endocytosis, and Exocytosis

Ch 5 Homeostasis and cell transport

3.5 Active Transport, Endocytosis, and Exocytosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

3.5 Active Transport, Endocytosis, and Exocytosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Cell Transport Notes.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Types of Transport.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.5 Active Transport, Endocytosis, and Exocytosis

Cell Transport Review.

Active and Passive Transport

Microscope Men Robert Hooke Antonie von Leeuwenhoek

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Presentation transcript:

Microscope Men Robert Hooke - 1665 Antonie von Leeuwenhoek -1675

The Cell Theory Matthias Schleiden Theodor Schwann Rudolf Virchow

The Cell Theory Living things are made up of cells. The cell is the basic unit of life. All cells come from pre-existing cells by division. Cells contain DNA which is passed from cell to cell during cell division. All cells are basically the same in chemical composition. All energy flow (metabolism & biochemistry) of life occurs within cells.

Singer & Nicholson 1976 The Cell Membrane a.k.a “Fluid Mosaic” Model

CO2 O2 Small molecules Small molecules that can cross CM freely. Crossing the Membrane CO2 O2 Small molecules Small molecules that can cross CM freely.

Diffusion Concentration gradient – different between concentration of one molecule in one area vs. another. Diffusion occurs down a concentration gradient.

Osmosis In cells, osmosis is the diffusion of water across a cell membrane.

Turgor Pressure vs. Plasmolysis

Turgor Pressure vs. Plasmolysis

Facilitated diffusion Passive Transport No energy required Occurs “down” the concentration gradient

Diffusion & Osmosis are examples of passive transport Facilitated diffusion makes use of carrier proteins

Active Transport Moving against the concentration gradient Going from low concentration to high Energy is needed to transport molecules. Involves carrier proteins

Bulk Transport Many macromolecules are too large to be transported by carrier proteins. They are transported in or out of the cell by means of vesicle formation

Phagocytosis – “cell Eating” Endocytosis Phagocytosis – “cell Eating”

“Cell drinking”