Unit 2: Regulating an Internal Environment
Vocabulary: phospholipid, glycerol, fatty acid, hydrophobic, hydrophilic, transport protein, receptor protein, marker protein, lipid bi-layer, fluid mosaic model, selective permeability, diffusion, concentration gradient, dynamic equilibrium, osmosis, hypotonic, hypertonic, isotonic, turgor pressure, passive transport, active transport, facilitated diffusion, endocytosis, exocytosis, prokaryotic cells, homeostasis
Student Objectives:
- I will be able to explain the reason for the difference between polar and non-polar molecules.
- I will be able to explain the forces exerted among polar and non-polar molecules.
- I will be able to describe the phospholipid molecule (major component of a cell membrane) in terms of chemical composition, areas of polarity/ non- polarity, and orientation.
- I will be able to draw what a phospholipid molecule looks like and label parts.
- I will be able to label and describe a fluid mosaic plasma membrane- including phospholipids, hydrophilic and hydrophobic ends, cholesterol and transport proteins.
- I will be able to describe the role of each component of the fluid mosaic plasma membrane.
- I will know why the plasma membrane is selectively permeable and which materials will readily pass across the membrane and those that will not.
- I will know the process of diffusion and what dynamic equilibrium means.
- I will know how random motion influences diffusion due to kinetic energy and concentration gradients.
- I will know the difference between isotonic, hypotonic ad hypertonic solutions. I will be able to accurately predict water movement into and out of each type of solution.
- I will be able to describe the three main types of passive transport: simple diffusion, osmosis, and facilitated diffusion.
- I will be able to compare and contrast three main types of passive transport.
- I will be able to describe the process of active transport and explain why energy is needed.
- I will be able to describe endocytosis and exocytosis, both processes of active transport.
- I will understand the basic structure of prokaryotic cells and be able to draw it.
- I will be able to include the role of the plasma membrane, need for appropriate metabolism and maintaining homeostasis in prokaryotes.