Ch.7 - The MembraneSee all chapters
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Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Active Transport

See all sections
Fluid Mosaic Model
Osmosis and Diffusion
Facilitated Diffusion
Active Transport
Bulk Transport

Concept #1: Active Transport and Pumps

Concept #2: Secondary Active Transport

Practice: The type of transport that is specific, requires special carrier molecules and energy is:

Practice: Secondary active transport requires ATP

Practice: What is the difference between a symporter and an antiporter?

Additional Problems
A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known asa. osmosisb. diffusionc. facilitated transportd. active transport 
Active transport is different from simple diffusion in that active transport: a. Requires energyb. Moves molecules against a concentration gradientc. Requires proteins embedded within the cell membraned. Moves molecules from an area of lower concentration to an area of higher concentratione. All are correct
CFTR moves chloride ions out of cells by active transport. What can be inferred from this statement?  a. Chloride concentrations are higher on the outside of the cell b. Chloride concentrations are higher on the inside of the cell c. Sodium concentrations are higher on the outside of the cell d. Sodium concentrations are higher on the inside of the cell  
How does phospholipid structure relate to the selective permeability of the plasma membrane? A critical feature of the plasma membrane is that it is selectively permeable. This allows the plasma membrane to regulate transport across cellular boundaries- -a function essential to any cell's existence. How does phospholipid structure prevent certain molecules from crossing the plasma membrane freely? Drag the labels to fill in the table. Use only white labels for white targets, pink labels for pink targets, and blue labels for blue targets.
The type of transport that is specific, which requires specific carrier molecules and energy isa. exocytosisb. facilitated diffusionc. active transportd. endocytosise. osmosis
In a single sodium-potassium pump cycle, ATP is used up with the result thata. 3 sodium ions leave and 2 potassium ions enterb. 1 sodium ion enters and 1 potassium ion leavesc. 1 sodium ion leaves and 1 potassium ion entersd. 3 sodium ions enter and 2 potassium ions leave 
Organize your understanding
The amino acid valine is transported into cells by a membrane protein that does not recognize any other substance. This is an example of: a. symport b. uniport c. antiport d. aquaporin
What's the difference between active and passive transport?
Compare and contrast indirect and direct active transport. Give a specific example for each type of transport.
What is the function of proton pumps localized the plasma membrane? Answer this in the context of membrane potentials (charge differences), concentration gradients, and osmosis. 
Explain how the following terms are different: A. symport and antiport B. active and passive transport C. membrane potential and electrochemical potential