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Cells Test


What is the type of barrier that only allows certain molecules to pass through? Selectively Permeable
What is the type of transport in which water moves with its concentration gradient? Passive Transport
What are the requirements for allowing materials to cross the barrier? Size of molecule, size of pore, and concentration
Which transport does not require energy from cell? Passive
What is it called when the concentration of a substance is the same throughout space? Equilibrium
Plasmolysis of a human red blood cell or plant would occur if the cell would occur if the cell were in what type of solution? Hypertonic
What is the bursting of a cell called? Cytolysis
What is the pressure that water molecules exert against a cell wall? Turgor Pressure
What is known as a relatively high solute concentration called? Hypertonic
What is the uptake of large particles called? Phagocytosis
What is known as a relatively low solute concentration called? Hypotonic
What is known as when the concentration of solutes outside and inside the cell are equal? Isotonic
What is a transport that requires the cell to expend energy called? Active Transport
Which type of molecule forms a bilayer within a cell membrane? Lipids
What other compounds have a close relationship with the membrane? Proteins
Glucose molecules cross the cell membrane down the concentration gradient leads to a ___________? Passive Transport
What is it called when ridding the cell of material by discharging it from sacs (vesicles) at the cell surface? Exocytosis
What organelle does a plant cell have that helps maintain stability and rigidity? Cell Wall
Which structure permits the entry and exit of dissolved materials in an animal cell? Cell Membrane
What is the structure most closely associated with the destruction of worn out cell organelles called? Lysosomes
In which organelle would water and dissolved materials be stored? Vesicles
What organelle is most directly involved in cellular aerobic respiration? Mitochondria
Which two structures are only found in animal cells? Vesicles and Centrioles
What is responsible for carrying on photosynthesis within plants? Chloroplasts
What is responsible for protein synthesis in the cell? Ribosomes
What structure are used to modify and package secretions for exports from the cell? Golgi Bodies
What is an organelle which appears to play a role in animal cell division? Centrioles
Name 3 parts of the cell theory and the scientists who contributed Robert Hooke- discovered and named the "cell" (observed cork and decided they look like prison cells) Robert Brown- discovered cell nucleus Scleiden & Schwann- all plants and animals ared made out of cells
What's the difference between passive and active transport? Active requires energy and passive does not
What process would happen to the molecules in a drop of ink dropped into a beaker of water? Diffusion
How would temperature affect diffusion? Heat would speed it up
Define hypotonic? Lower concentration of solute on inside and less H20 on OUTSIDE
Define hypertonic? Higher concentration of solute on outside and more H20 on INSIDE
Define isotonic? Equal balance of solutes on each side of membrane
Iodine was used to stain which organelle of potatoes in order to see them? Leucoplast
What is the End symbiotic Theory? Mitochondria and chloroplasts were once free living cells
What is the difference between a vesicle and a lysosome? A vesicle is the storage unit for the cell of water, nutrients, and waste. A lysosome has digestive enzymes that merge with vesicles to digest food.
What is the difference between a prokaryotic and eukaryotic cell? Prokaryotic- an organelle that has no nuclear membrane, no organelles in the cytoplasm except ribosomes Eukaryotic- an organelle with a structure of cytoplasm, a membrane-bound nucleus enclosing genetic material organized into chromosomes
Why did we use dyes such as methylene blue and iodine to stain specimens in lab? To identify different organelles
What is the difference between magnification and resolution? Magnification- (ex 100x) zooming in Resolution- clarity
What should be done when you can't focus an image under high power? Go back to low power
What does the coarse adjustment do? Used to focus on scanning and low power *NEVER HIGH*
What does the ocular lens do? (Aka Eyepiece) is the lens to look into microscope magnifies 10X
What does the diaphragm do? Regulates amount of light to pass through specimen
What does the high power objective lens do? Stronger magnification 40X
What does the revolving nose piece do? Holds and turns objective lens into viewing positions
What does the fine adjustment do? Sharpen image under low and HIGH power
Which direction do molecules always move? Down
Created by: KJohnson23