Lab 1 Exam Flashcards
What are the three types of graphs?
Pie, Bar, and Line Graph
What are the two axis on a line graph?
The X axis and Y axis
What are the names for the three main microscopes?
Stereo Dissecting, Compound, and Electron Microscope
Define Ocular for Microscope
Lens near the eye
Define Body Tube for Microscope
Keeps ocular and objective at proper distance from each other.
Define Nosepiece for Microscope
Permits interchange of low, medium, and high power objectives
Define Arm for Microscope
Supports body tube and focus knob.
Define Objectives for Microscope
Contain lenses of various magnification
Define Coarse Focus Knob for Microscope
Moves the stage for focusing.
Define Fine Focus Knob for Microscope
Moves stage in smaller increments to permit exact focus.
Define Base for Microscope
Bears the weight of the microscope and its components.
Define Mechanical Stage for Microscope
Holds slides and allows controlled movement of the slides.
Define Iris Diaphragm for Microscope
Regulates amount of light illuminating the specimen.
Define Illuminator for Microscope
Provides light source
Definition of Meniscus
The curved upper surface of a liquid in a tube.
What is a taxonomic key?
A method used to classify and identify objects and organisms.
Define Atom
Smallest part of an element.
Define Molecule:
More than one atom chemically bounded together.
Define Element
Pure substance that can not be broken into simpler parts.
Define Isomer
Two or more compounds with the same formula but a different arrangement of atoms in the molecule.
Define Marcomolecule
A molecule containing a very large number of atoms, such as a protein or nucleic acid.
Define Acid
Releases hydrogen ions. 0-6
Define Base
Releases hydroxide ions. 8-14
What did the balls, holes, sticks, and springs represent from the chem kit?
Balls: Atoms
Holes: Bond Sites
Sticks: Single Bonds
Springs: Double Bonds
Define Prokaryotic
A single-celled organism which has no nucleus, with a membrane.
Define Eukaryotic
A cell that has a nucleus surrounded by a membrane.
Whats the difference between autotrophic and heterotrophic?
Autotrophic can make their own food and Heterotrophic cant make their own food.
How temperature and size of molecule effect the speed of diffusion?
temperature goes up, the molecules move faster , the speed
if the molecules are large, then they can be bigger than the pores that they are supposed to diffuse through, and that means that they won’t be able to diffuse at all, or at the very least, the speed will become much slower.
Selectively permeable
A biological membrane that will allow certain molecules or ions to pass through it by diffusion.
Products that result from the breakdown of hydrogen peroxide
Hydrogen and oxygen gas
Enzymes
Bio catalysts, sometimes proteins, speeding up chemical reactions
Define Brownian Movement
The random movement of particles suspended in a liquid of gas.
Define Colloidal suspension
It is a system composed of large molecules suspended into a liquid medium.
What part of the cell is a colloidal suspension?
The cytoplasm is a colloidal suspension.
Define Flaccid Cell
Weak; soft; not very sturdy.
Define Catalyst
A substance that speeds up a chemical reaction without changing itself.
Define Substrate
A molecule entering in an enzyme influenced reaction.
How do enzymes work?
Are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction.
Define Turgid Cell
Turgidity, is caused by the osmotic flow of water from an area of low solute concentration outside the cell.
Define Plasmolysis
Contraction of the protoplast of a plant cell as a result of loss of water from the cell.
Define Osmosis
Molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
Define Diffusion
The movement of molecules from an area of high to low concentration.
