Transport in the Cell Active and Passive Transport

































- Slides: 33

Transport in the Cell Active and Passive Transport

How can molecules move through cells? • Semi-permeable membrane: allows certain molecules to move in or out depending on their properties – Ex: if they are too big, they can’t go in easily • Membrane is made of (composition): – Bi-lipid layer • 2 layers of lipids – Proteins that transport materials across – Carbohydrates that act as identifiers

Fluid Mosaic Model-membrane is a fluid with a bunch of different components

Before we begin you must understand…. • Concentration-how much solute is in a solvent • Why must molecules move? – To maintain homeostasis – Homeostasis-state of balance in which the internal body remains in a normal range – Molecules must move to maintain this

Biology 11/5 HW-Concept Map 1. Take out 7. 3 wkst and 7. 3 notes. 2. Pick up your binder in the back. Put 7. 3 reading guide in wkst section.

2 types of transport in the cell • Passive transport – Molecules move down the concentration gradient • Area where there is a lot of molecules to where there is very little – Energy involved: NO • Active transport – Molecules move up the concentration gradient • Area where there is a few molecules to where there is a lot – Energy involved: YES

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Type of Passive Transport Diffusion-movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached – Equilibrium-equal distribution • Molecules will move equally after this is reached. – Simple molecules can move • Carbon dioxide, oxygen

Passive transport

Osmosis-Type of passive transport • Water moves from an area of high concentration to an area of low concentration – No energy involved – AKA: diffusion of water

Hypertonic and Hypotonic • Hypotonic-More water outside the cell than inside – Distilled water – Water comes into the cell – Why? To balance out the concentration of solutes • Hypertonic-More water inside the cell than outside – Salt water – Water leaves the cell – Why? to balance out the concentration of solutes

Isotonic • Molecules are equal inside and outside the cell – Molecules move evenly across the membrane


Biology 11/14 HW-finish concept map Agenda: Stations; finish notes You should be: 1. Take out 7. 3 notes 2. Take out paper with station information.

Station Exploration • You will visit different stations. • At each station, there will be directions telling you what conditions each item was place in or what to do with each item. • On your paper, you need to write down a brief description of what you see and why. – Examples of answers for why: hypertonic, hypotonic, diffusion, osmosis, decrease in turgor pressure, molecule movement

Why is water so important to a plant? • Water fills the vacuole and the contents of the cell are pushed against the cell wall • Produces turgor pressure • Gives the plant rigidity and the ability to stand erect



Facilitated Diffusion-3 rd type of passive transport • Molecules move from an area of high concentration to an area of low concentration with the help of a carrier protein – Molecules attach to a specific protein – The protein allows it to move through the membrane – Needed when molecules are too big or have an electrical charge (ions!!) • Glucose (large molecules), Na+, Ca+, K+, Cl-


Active Transport-A reminder! • Requires energy from the cell • Move molecules from an area of low concentration to high

Endocytosis • Process for bringing things into the cell • Used for large particles (bigger than molecules, still microscopic) • Requires energy


Phagocytosis Pinocytosis • “Cell Drinking” • “Cell Eating” • Small bits of liquid • Very large or other substances particles taken in by cell (engulfed) taken in


Exocytosis • Process for moving large amount of material out a cell


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Bio 11/13 HW-finish wkst; Lab due Friday; test and flashcards Friday (25 from 7. 3 and 10 from 7. 4) 1. Turn in analysis questions. Put transport review in wkst section. This is a great study tool for the test. Put lab info in lab section. 2. Take out 7. 4 notes-we will finish this.

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Section 7. 4 • Unicellular-one celled – Bacteria, algae, yeast – One cell does all the work • Multicellular-many celled – Plants, humans – Specialized cells do certain things

Specialization • Cell develop differently to perform different tasks • All cells at one time in your body are the same (stem cells) – Then they differentiate in fetal development • • Become different cells with different functions Muscle cells-allow movement Red blood cells-carry oxygen Guard cells in plants open and close stomata on a leaf.

Smallest level Group of tissues Group of organs that perform a specific function Group of similar cells Largest level
Primary active transport and secondary active transport
What is passive transport
Primary active transport vs secondary active transport
Passive transport vs active transport venn diagram
Active vs passive transport venn diagram
Unlike passive transport, active transport requires *
Active and passive transport
Difference of active and passive transport
Bioflix activity membrane transport active transport
Isotonic in biology
Active or passive transport
Is photosynthesis active or passive transport
Active or passive transport
Exocytosis active or passive transport
Exocytosis active transport
Active vs passive transport
Example of active transport in a cell
Active high and active low
Secondary active transport
Facilitated diffusion and active transport
Indirect active transport
Exocytosis
Deliberative listeners strive to remember information and:
Active and passive voice class 11
Active attack and passive attack
Passive infinitive and gerund
Active and passive voice comic strip
I had worn blue shoes
Passive and active reinforcement learning
Passive reinforcement learning
What is active range of motion
Where is the axis for flexion and extension of the elbow?
Present perfect active and passive
Present infinitive passive