Unit 4 Concept Map
Course Essential Question
Unit 4 - Homeostasis and Transport: Through a variety
Grade Level: 10
of mechanisms organisms seek to maintain a biological balance
between their internal and external environments.
Subject: Biology
Unit Essential Question
How do organisms maintain a biological balance between their internal and external environments?
PA Standards/Anchors/(Assessment Anchor/Eligible Content)
BIO.A.4.1, BIO.A.4.2.1
Lesson Essential Questions:
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How do organisms maintain homeostasis (biological
balance) against fluctuations in both the internal and
external environment?
What types of mechanisms enable water, ions, and
molecules to move into and out of cells?
What are the types of passive transport? Describe the
mechanisms of substance movement.
What are the types of active transport? Describe the
mechanisms of substance movement.
Concepts
1.
2.
3.
4.
5.
6.
7.
Homeostasis dynamically returns biological changes
(body temperature, osmolarity, blood pressure, pH, blood
glucose, etc.) to balance by modifying chemical
reactions, adjusting energy transformations, and
responding to environmental changes.
Molecules, ions and water move in and out of the cell
through a variety of mechanisms.
Passive transport depends on the diffusion of substances
with a concentration gradient moving across a
membrane from an area of higher concentration to an
area of lesser concentration without energy.
Both passive and facilitated diffusion move materials
along a concentration gradient without energy.
Osmosis is the diffusion of water from an area of lower
solute concentration (more aqueous solution) across a
membrane to an area higher solute concentration (less
aqueous solution).
Active transport moves atoms, ions and small molecule
mostly against a concentration gradient and requires an
expenditure of energy.
Active transport of larger substances and subcellular
structures occurs through endocytosis (including
phagocytosis and pinocytosis) and exocytosis.
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Vocabulary
1. Diffusion
2. Facilitated Diffusion
3. Homeostasis
4. Homeostatic mechanism
5. Passive transport
6. Active transport
7. Osmosis
8. Endocytosis
9. Exocytosis
10. Protein pumps
11. Ion pumps
12. Sodium-Potassium pump
13. Pinocytosis
14. Phagocytosis
15. Selectively permeable membrane
16. Impermeable
17. Osmotic pressure
18. concentration
19. concentration gradient
20. isotonic
21. hypotonic
22. hypertonic
Skills
1. Describe how the structure of the plasma
membrane allows it to function as a
regulatory structure and/or protective
barrier for a cell.
2. Compare and contrast the mechanisms that
transport materials across the plasma
membrane (i.e. passive transport- diffusion,
osmosis, facilitated diffusion; active
transport – pumps, endocytosis, exosytosis)
3. Describe how endoplasmic reticulum, Golgi
apparatus, and other membrane-bound
cellular organelles facilitate transport of
materials within cells.
4. Explain how organisms maintain
homeostasis (e.g. thermoregulation, water
regulation, oxygen regulation)
Formative Assessments Summative Assessments
1. Ticket out the
1. Quizzes
door
2. Unit Test
2. Think-pair-share
3. Labs:
3. Thumbs up –
 Cucumber in Salt
Thumbs down
Water
4. Concept Map
 Egg Lab
5. Sentence starter
 Diffusion Lab –
prompts
PH Lab manual #7
6. Collins writing
4. Projects
7. Venn diagram
5. CDT biology
8. Compare
contrast
9. 3-2-1
10. Frayer diagrams
11. KWL
12. Whiteboard
responses
Resources
Biology textbook
Powerpoints (from textbook resources)
Biology websites:
-biologyjunction.com
-biologycorner.com
-biology.com