by ashley weidmark and annabelle duarte-monteiro
DESCRIPTION
B2.2 plan and conduct an investigation to demonstrate the movement of substances across a membrane (e.g., the effects of salt water and distilled water on a potato) [IP, PR] B2.5 plan and conduct an investigation related to a cellular process (e.g., factors that affect enzyme activity; factors that affect transport of substances across cell membranes), using appropriate laboratory equipment and techniques, and report the results in an appropriate format [IP, PR, C] B3.6 describe the structure of cell membranes according to the fluid mosaic model, and explain the dynamics of passive transport, facilitated diffusion, and the movement of large particles across the cell membrane by the processes of endocytosis and exocytosisTRANSCRIPT
Cellular Membraneand Transport
By Ashley Weidmark and Annabelle Duarte-Monteiro
Concept Overview
Cell Membrane
and Transport
Passive Transport
Osmosis Simple Diffusion
Facilitated Diffusion
Active Transport
Primary Active Transport
Secondary Active
Transport
Membrane Assisted
Transport
Exocytosis Endocytosis
B2.2 plan and conduct an investigation to demonstrate the movement of substances across a membrane (e.g., the effects of salt water and distilled water on a potato) [IP, PR]
B2.5 plan and conduct an investigation related to a cellular process (e.g., factors that affect enzyme activity; factors that affect transport of substances across cell membranes), using appropriate laboratory equipment and techniques, and report the results in an appropriate format [IP, PR, C]
B3.6 describe the structure of cell membranes according to the fluid mosaic model, and explain the dynamics of passive transport, facilitated diffusion, and the movement of large particles across the cell membrane by the processes of endocytosis and exocytosis
Curriculum Expectations
Intro: Hook - Video on Fluid Mosaic Model http://www.youtube.com/watch?v=LKN5sq5dtW4
Read pp. 68-70 and Complete Review Questions: pp. 71 (Carter-Edwards, Trent, Susanne Gerards et al. Biology 12. 2011 ed. Toronto: McGraw-Hill Ryerson, 2011. Print.)
Define Key terms pp. 72 (Carter-Edwards, Trent, Susanne Gerards et al. Biology 12. 2011 ed. Toronto: McGraw-Hill Ryerson, 2011. Print.)
Lesson 1: Cellular Membranes
Complete Diffusion Activity (Gizmo) http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=417 and student exploration sheet http://cs.explorelearning.com/materials/DiffusionSE.pdf
Complete Osmosis Activity (Gizmo) http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=418 and student exploration sheet http://cs.explorelearning.com/materials/OsmosisSE.pdf
Lesson 2: Passive Transport I
Review of 3 types of Passive Transport i.e. Simple Diffusion, Osmosis, Facilitated diffusion (channel proteins and carrier proteins) http://www.zerobio.com/flashmx/transport.swf
Lab: http://library.thinkquest.org/27819/transport_across_a_membrane_lab.html
OR Lab: http://www.mrsec.psu.edu/museum/biology/procedures/membranes.pdf
Lesson 3: Passive Transport II
Read pp. 75-77 Complete Learning Check pp. 77 # 31-36 (Carter-Edwards, Trent, Susanne Gerards et al. Biology 12. 2011 ed. Toronto: McGraw-Hill Ryerson, 2011. Print.)
Membrane Assisted Transport: Endocytosis/Exocytosis:
http://www.maxanim.com/physiology/Endocytosis%20and%20Exocytosis/ee4.swf
Lesson 4: Active Transport
Misconception #1: Facilitated diffusion uses only channel proteins. Active transport uses only carrier proteins.
Rectification #1: Facilitated diffusion uses both channel protein and carrier proteins. The carrier protein can change conformation without ATP hydrolysis. Active transport uses only carrier proteins which can change conformation only upon ATP hydrolysis.
Common Misconceptionsand Rectifications
Misconception #2: Passage of small, hydrophobic molecules through the phospholipid bilayer is called “diffusion”
Rectification #2: Passage of small, hydrophobic molecules through the phospholipid bilayer is called “simple diffusion”
As learning:◦ Assess the student worksheets completed with the
Gizmo activity in lesson 2◦ Assess the lab report completed during lesson 3◦ During lesson 4, in small groups, students can make
a T-chart comparing the different types of transport systems
Of learning:◦ Students can construct an interactive model or
diagram of the cell membrane and all the transport systems.
◦ Paper and pencil test
Assessment Strategies
Students will understand how gases such as oxygen and carbon dioxide move in and out of blood.
Students will understand the implication of certain poisons affecting these channels and therefore effecting the body’s electrical impulses.
Practical Applications and Societal Implications