Download HS Life Sci Standard 2.5 Cells

Curriculum Guide
High School Science 2.5
Life Science Standard 2.5 - Cells use passive and active transport of substances across membranes to maintain relatively stable intracellular environments.
Related Colorado Department of Education Sample Units:

Homeostasis - High School Biology (Concepts: Molecular Transport, Homeostasis, Energy, Structure, Function, Regulation)
Essential Questions - 21st Century Skills and Readiness Competencies (District):
1. What are the differences and similarities between active and passive transport and
what factors influence their rates?
2a. How does the direction of osmosis depend on the concentration of the solutes on
both sides of a membrane?
2b. Why is it important that cell membranes are selectively permeable?
3. How do proteins act as gateways through the cell membrane and use receptors to
recognize molecules?
4. How does the amount of energy vary for active and passive transport and from
where does the energy come?
5. How are cell transport mechanisms modeled?
Evidence Outcomes (District):
1. Analyze and interpret data to determine the energy requirements and/or rates of
substance transport across cell membranes.
2. Compare organisms that live in freshwater and marine environments, and identify
the challenges of osmotic regulation for these organisms.
3. Diagram the cell membrane schematically, and highlight receptor proteins as targets
of hormones, neurotransmitters, or drugs that serve as active links between intra and
extracellular environments.
4. Use tools to gather, view, analyze, and interpret data produced during scientific
investigations that involve passive and active transport.
5. Use computer simulations and models to analyze cell transport mechanisms.
Academic Vocabulary (District):
Adenosine diphosphate (ADP)
Adenosine triphosphate (ATP)
aerobic respiration
anaerobic respiration
autotroph
chlorophyll
chloroplast
chromatography
dark reaction (Calvin cycle)
fermentation
glycolysis
grana
heterotroph
light reaction
mitochondria
Phosphoglyceric acid (PGA)
photosynthesis
respiration
thylakoid membrane
Assessment (District):
1. Assess the foldable for correctness of content.
1. & 4. Use the Egg Osmosis Lab report to assess knowledge of transport across a
membrane.
2a. Using the Osmotic lab report from Activity #1, assess the data table and line graph
for comparing rates.
2b. Have students create a data table as outlined in the activity, answer the
ten questions from the lesson plans, and choose one of the extended activities to
perform for their final evaluation.

2b. Freshwater-Marine Water Key
2c. Assessments are embedded within the website.
3. Assess that students are able to explain cell models using the following terminology:
cell, cell membrane, phospholipid, receptor and signal molecules, selective
permeability, protein channels, protein pumps, carbohydrate chain, and fluid mosaic
model.
5. Assess the activity which corresponds with the simulation and answers to the
eleven questions provided.

Suggested Activities/Strategies (District):
1. Students create a foldable for the different types of cellular transport, including a
description and a picture for each.

Cellular Transport Simulation
1. & 4. Have the students conduct the Egg Osmosis Lab using an egg as a model
for osmosis.

1, 2a, & 4. Egg Osmosis Lab
2a. Using the Egg Osmosis Lab, compare osmotic rates in freshwater versus saltwater.
2b. Use the virtual field trip to compare marine versus freshwater ecosystems.
2b. Comparison Field Trip
2c. Students practice flash cards on osmoregulation for marine and freshwater fish,
then play the scatter game for two minutes.

2c. Quizlet for Osmoregulation
3. Build a model of the cell to investigate what is inside the cell and how the cell
membrane regulates what moves into and out of cells.

3. Cell Membrane Model

3a. Alternate Cell Model
5. Use the computer simulation of membrane channels.

5. Computer Simulation of Cell Membranes

5. Membrane Channel Hand-Out
Resources/Technology (District):

Egg Osmosis

Various Cell Activities

Plant and Animal Simulations and Coloring Pages

Video on Voyage Inside the Cell

Cell Membrane PowerPoint

ATP PowerPoint

Osmoregulation PowerPoint