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NBCHBCh5Johnson

chapter 5 test for honors bio study guide

QuestionAnswer
What is the function of the plasmodesmata junction? 5.2 permit diffusion of water, ions, RNA, and proteins between connected cells.
What is the difference between cell recognition and cell adhesion? 5.2 Cell recognition is when 1 cell specifically binds to another certain type of cell, while cell adhesion is simply when the connection between cells is stregnthened.
In most cells binding in tissues is ________ . 5.2 homotypic- the same molecule sticks out of both cells , and the exposed surfaces bind to each other.
What is the difference between diffusion and osmosis? 5.3 diffusion is the process of random towards a state of equilibrium,and osmosis is the diffusion of water across membranes.
What is turgor pressure? 5.3 an internal pressure against the cell wall that prevents further water from entering (keeps plants upright and is the driving force for the enlargment of plant cells.
Why are carrier proteins needed?5.3 to transport polar molecules like amio acids and sugars.
What is the differnce between primary and secondary active transport?5.4 primary requires direct ATP and secondary does not require ATP directly(supplied by ion concentration gradientmade by primary)
How many Na+ does the sodium potassium pump take in? K+? 5.4 3;2
Why is exocytosis different from the other process types? 5.5 it moves materials OUT of the cell
What kind of cells use phagocytosis?pinocytisis? 5.5 unicellular protists and white blood cells; endothelium
Why do cells use receptor mediated endocytosis?5.5 to capture specific macromolecules from the cell's environment.
What happens to red blood cells in a hypertonic solution? wildcard cells lose water and shrivel
Created by: chocoholic810
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