Section 5: Active Transport

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Presentation transcript:

Section 5: Active Transport Chapter 3: Cells Section 5: Active Transport Chapter 3: Cells Section 5: Active Transport

Active Transport Presentation Finish Red Onion Osmosis Lab Chapter 3: Cells Section 5: Active Transport Agenda: Do Now! Active Transport Presentation Finish Red Onion Osmosis Lab

Think about the words “endo-” and “exo-” Chapter 3: Cells Section 5: Active Transport Do Now! Think about the words “endo-” and “exo-” For each, write down another word that contains these prefixes. Next, write down what you think “endo-” and “exo-” mean.

Chapter 3: Cells Section 5: Active Transport

In this case, to solutes go up or down the gradient? Chapter 3: Cells Section 5: Active Transport Active Transport Active transport moves solutes from low concentration to high concentration. Molecules move “up” or “against” the gradient. It is “active”: it uses energy input from the cell. In this case, to solutes go up or down the gradient?

through protein transport pumps Exocytosis Endocytosis Phagocytosis Chapter 3: Cells Section 5: Active Transport Active Transport Three major types of active transport: through protein transport pumps Exocytosis Endocytosis Phagocytosis

Chapter 3: Cells Section 5: Active Transport Transport pumps Transport pumps are proteins that use energy to move solutes through the membrane, against the gradient. They change shape as they work, opening, closing, and exposing new binding sites.

Active Transport (YouTube link) Chapter 3: Cells Section 5: Active Transport Active Transport (YouTube link)

Sodium-Postassium Pump (YouTube link) Chapter 3: Cells Section 5: Active Transport Sodium-Postassium Pump (YouTube link)

Chapter 3: Cells Section 5: Active Transport Exocytosis “Exo” means “outside”; “cyto” means “cell”; “osis” means “process” the process by which a cell releases substances by the fusion of a vesicle with the membrane. Allows the cell to release molecules that are too big for transport channels. Example: Neurotransmitters

Exocytosis (YouTube link) Chapter 3: Cells Section 5: Active Transport Exocytosis (YouTube link)

This is how neuro-transmitters work! Chapter 3: Cells Section 5: Active Transport This is how neuro-transmitters work!

Endocytosis “Endo” means “inside”; “cyto” means “cell” Chapter 3: Cells Section 5: Active Transport “Endo” means “inside”; “cyto” means “cell” the process by which a cell takes liquids or fairly large molecules into a cell by engulfing them in a membrane. Allows the cell to bring in molecules that are too big for transport channels. Example: White blood cells eating infectious bacteria Endocytosis

Endocytosis (YouTube link) Chapter 3: Cells Section 5: Active Transport Endocytosis (YouTube link)

Example: White blood cells eating infectious bacteria Chapter 3: Cells Section 5: Active Transport Phagocytosis “phago” means “eat” a type of endocytosis in which the cell membrane engulfs large particles. Example: White blood cells eating infectious bacteria

Chapter 3: Cells Section 5: Active Transport

Exo- and Endocytosis (YouTube link) Chapter 3: Cells Section 5: Active Transport Which is this? Endocytosis! Which is this? Exocytosis! Exo- and Endocytosis (YouTube link)