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Cells Test
Biology
| Question | Answer |
|---|---|
| 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
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