Ch. 4: “Cells & Their Environment”

Slides:



Advertisements
Similar presentations
Cells and Their Environment
Advertisements

Active Transport  Active transport moves molecules across the cell membrane from an area of _______concentration to an area of ____________ concentration.
ACTIVE TRANSPORT. Moving substances against their concentration gradient Cost energy!!! Types of Active Transport  Sodium-potassium pumps  Endocytosis.
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.
Cells and Their Environment
Chapter 4 Cells and Their Environment
Chapter 4 Notes Cell Physiology Biology Hamilton Science Department.
Cells and Their Environment
Cells and Their Environment
Biology Chapter 8 Review
Active and Passive Transport. Passive Transport Movement of substance through the cell membrane without the input of energy Three types – Diffusion –
Unit 6 Cell Transport Part 2. Facilitated Diffusion  Carrier protein in the cell membrane is needed to help move a specific molecule across  Facilitated.
Passive and Active Transport
Cells and Their Environment Ch. 4 Biology. Membrane Structure Phospholipid Bilayer 2 layers of phospholipids Proteins Transport Receptors Cholesterol.
Homeostasis and Transport
Cells and Their Environment
Cells and Their Environment
Chapter 7.3 Cell Boundaries. Passive Transport  The movement of a substance across a cell membrane without the use of energy is called passive transport.
Ch. 8 Cells & Their Environment
Active Transport Overview Sometimes cells need to move substances from low concentration to high concentration These substances move up the concentration.
maintaining homeostasis
Ms. Hughes.  All living things respond to their environments.  Homeostasis is the maintenance of stable internal conditions in a changing environment.
Biology 4.2 Active Transport
Diffusion  Diffusion is moving particles from an area where there are many particles to an area where there are less particles.  When the particles are.
A. Active Transport a. Active transport is the transport of a substance across the cell membrane against its concentration gradient (from low to high.
Cells and Their Environment. Sections 1 & 2 Passive transport Movement that does not require energy from the cell Examples: Diffusion, Osmosis, and Crossing.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu To View the presentation as a slideshow with effects select “View”
Cells and Their Environment. Cell membranes – function to communicate between neighboring cells. They also serve as a selectively permeable barrier. It.
Discussion Questions – in your notes 1. Movement across a cell membrane without the input of energy is described by what term? 2. A substance moves from.
Transport: Passive and Active. Structure of Cell membranes Fluid not rigid Selectively permeable Made of a phospholipid bilayer Embedded with proteins.
Active Transport Part 2. Active Transport Active Transport: ATP (energy) needed, Goes AGAINST the concentration gradient (low  high) 3 Types of Active.
Chapter 2 Lesson 3 Moving Cellular Materials. Cell Membrane The cell membrane is selectively permeable ◦ It allows certain things into the cell while.
Active Transport Section 4-2.
Active Transport Section 4.2. Movement Against a Concentration Gradient  The transport of a substance across the cell membrane against its concentration.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Cells and Their Environment Chapter 4 Table of Contents Section 1.
Part 3: Homeostasis and Cell Transport (Chapter 5)
Section 2: Active Transport
November 19, 2015 Bell Work: What is a concentration gradient?
Active Transport.
Cells and Their EnvironmentSection 2 Section 2: Cell Transport Preview Key Ideas Passive Transport Osmosis Active Transport Summary.
Active vs. Passive Transport FA Learning Goal: Compare and contrast active and passive transport.
Key Ideas What determines the direction in which passive transport occurs? Why is osmosis important? How do substances move against their concentration.
Ch. 8 Cells & Their Environment
Cellular Transport Molecules moving across the cell membrane Cell Membrane is selectively permeable (lets some things in, some things out, but not everything)
Permeability of Cell Membrane Advanced Biology. Transport Vocabulary Concentration gradient  Difference in the concentration of a substance throughout.
Biology Jeopardy Ch 4 Review yippyGot itYepokaywhyyikes
Cell Transport Chapter 4.
Ch 4- Cells and Their Environment 4.1: Passive Transport 4. 2: Active Transport Red & white blood cells in arteriole - SEM.
Cell Movement and Energy
Cell TRANSPORT SB1d. Explain homeostasis and describe the movement of materials through the cell membrane. Explain the impact of water on life processes.
4/5 Wednesday’s Notes: Active Transport
March 6, 2018 Objective: To create a model of the cell membrane
Cell Transport.
ACTIVE TRANSPORT Active transport – the transport of a substance across the cell membrane against its concentration gradient; because the movement of.
Section 5.2 Active Transport
ACTIVE TRANSPORT Active transport – the transport of a substance across the cell membrane against its concentration gradient; because the movement of.
Diffusion.
Chapter 4 Objectives Compare active transport with passive transport.
PASSIVE AND ACTIVE TRANSPORT IN CELLS
Chapter 4 Cells and Their Environment
Cellular Homeostasis – the plasma membrane
ACTIVE TRANSPORT Active transport – the transport of a substance across the cell membrane against its concentration gradient; because the movement of.
Objective Students will be able to define the terms bulk transport, endocytosis, and exocytosis in order to describe how molecules gets into and out.
Chapter 4 Objectives Compare active transport with passive transport.
Unit 4: Cells 4.5 Active Transport
Day 5.
Cells and Their environment
Homeostasis and Transport
Cell Transport.
ACTIVE TRANSPORT Active transport – the transport of a substance across the cell membrane against its concentration gradient; because the movement of.
Presentation transcript:

Ch. 4: “Cells & Their Environment” Directed Reading: “Active Transport”

Fill in the Blank 1. The transport of a substance across the cell membrane against its concentration gradient is called ___. active transport 2. Active transport requires the cell to use ___. energy 3. The energy needed for active transport is usually supplied by ___. ATP 4. The sodium-potassium pump is a(n) ___ protein. carrier

Fill in the Blank 5. The concentration of sodium ions inside the cell is usually ___ than the concentration of sodium ions outside the cell. less 6. The concentration of potassium ions inside the cell is usually ___ than the concentration of potassium ions outside the cell. greater 7. The sodium-potassium pump picks up ___ ions outside the cell. potassium 8. The sodium-potassium pump releases ___ ions inside the cell.

Short Answer/Essay 9Q. Explain why proteins and polysaccharides cannot diffuse through the membrane like water does. 9A. Proteins and polysaccharides are too large.

Short Answer/Essay 10Q. What is the difference between endocytosis and exocytosis? 10A. Endocytosis involves the movement of substances into cells. Exocytosis involves the movement of substances out of cells.

Short Answer/Essay 11Q. How is a vesicle formed in endocytosis? 11A. In endocytosis, a cell membrane forms a pouch around a substance. The pouch closes up and pinches off from the membrane, enclosing the substance in a vesicle inside the cell.

Short Answer/Essay 12Q. What happens to a vesicle in exocytosis? 12A. In exocytosis, a vesicle fuses with the inner surface of a cell membrane. The outer surface of the membrane opens, releasing the contents of the vesicle outside the cell.

Short Answer/Essay 13Q. How do sodium-potassium pumps support the efficient functioning of cells? 13A. They keep the sodium content of the cell at a low level. Too much sodium in a cell would cause water to enter the cell by osmosis, causing the cell to swell or burst. They also maintain the concentration gradients of sodium and potassium ions, which cells use to transport substances such as glucose across cell membranes.

Matching 14. signal molecule f. carries information throughout the body and to other cells 15. receptor protein c. a protein that binds to a specific signal molecule 16. ion channel a. a large protein in the cell membrane that transports a specific ion 17. second messenger b. acts as a signal molecule in the cytoplasm

Matching 18. enzyme action d. speeds up chemical reactions in the cell 19. beta blocker e. a drug that interferes with the binding of signal molecules to receptor proteins in heart muscles 20. changes in permeability g. occur when a receptor protein is coupled with an ion channel

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.