1. Compare and contrast the following transport types across the plasma membrane in terms of a) how molecules move b) what direction molecules move and c) is energy used or not. Simple Diffusion: Facilitated Diffusion: Osmosis: Active Transport: 2. Describe Cell Theory and identify its 3 tenants. 3. All forms of life on Earth have one of two types of cells. What are the two types of cells, and what structural features make them different? 4. In the previous question we focused on differences, but what are the 4 structures/components that all cells on Earth share in common?
Added by Kristen L.
Close
Step 1
Comparing transport types across the plasma membrane: a) How molecules move: - Simple Diffusion: Molecules move randomly and passively across the membrane. - Facilitated Diffusion: Molecules move passively across the membrane with the help of transport Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 61 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Comparing different mechanisms of transport across a plasma membrane: Fill out the following chart Simple Diffusion, Facilitated Diffusion, Primary Active Transport, Secondary Active Transport Types of molecules transported? (List size, polarity, charge) Requires a carrier or channel protein? (Yes/No) Requires an additional energy source? (Yes/No) Do any molecules travel against their concentration or electrochemical gradients? (Yes/No)
Sri K.
a. Membrane transporters and membrane channels b. Active and passive transport c. Uniporter, Symporter, and Antiporter d. Voltage-gated, ligand-gated, and stress-gated channels
Mystique T.
Comparing different types of molecular transport Complete the following table to compare and contrast these different types of molecular transport across a cellular membrane: for each characteristic on the left, draw checkmarks in the appropriate boxes to indicate which transport process(es) it accurately describes. Simple Diffusion Facilitated Diffusion Osmosis Active Transport It is a passive transport process It requires a transport protein It costs energy (often in the form of ATP) Moves a substance against its concentration gradient It is limited to small, nonpolar molecules Permits the system to approach equilibrium
Imaan A.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD