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Midterm
Review
29
Biology
9th Grade
01/22/2008

Additional Biology Flashcards

 


 

Cards

Term
Thalamus
Definition
  • Recieves all sensory processing except olfactory
  • Important in memory and emotion
  • Doesnt store memory
  • Below the corpus callosum
Term
Hypothalamus
Definition
  • Also recieves sensory processing
  • Maintains homeostasis
    • hunger, sleep, thirst, body temperature, and water balance
  • Communicates with the pituitary gland
    • a linkbetween the nervous system and endocrine system
Term
Synapse
Definition
  • the gap between neuron cells
Term
Neurotransmitter
Definition
  • used to relay, amplify, and modulate signals between a neuron and another cell
Term
Reflex Arc
Definition
  • a neural pathway that mediates a reflex action
  • some synapse in the spinal cord
Term
Autonomic Nervous System
Definition
  • A part of the peripheral nervous system that acts as a control system, maintaining homeostasis in the body.
  • These maintenance activities are primarily performed without conscious control or sensation.
Term
Action Potential
Definition
  • hange in the plus/minus charge inside and outside the cell.
Term
Resting Potential
Definition
  • the membrane potential that would be maintained even if there were no action potentials, synaptic potentials, ot other active changes in the membrane potential. 
Term
Sodium/Potassium Pump
Definition
  • an enzyme located in the cell membrane.
  • it is found in the cell membrane of virtually every human cell and is common to cellular life
Term
Endosymbiosis
Definition
  • A mutually beneficial relationship in which one organism lives inside the other
Term
tonicity
Definition
  • Normal firmness or functional readiness in body tissues or organs.
Term
Plasmolysis
Definition
  • Shrinkage or contraction of the cytoplasm away from the wall of a living plant or bacterial cell, caused by the loss of water through osmosis. 
Term
Turgor Pressure
Definition
  • the pressure of the cell contents against the cell wall.
Term
Facilitated Diffusion
Definition
  • a process of diffusion, a form of passive transport, where molecules diffuse across membranes, with the assisstance of transport proteins.
Term
Active Transport
Definition
  • the movement of a chemical substance throug h a gradient of concentration or electical potential in the direction opposite to normal diffusion, requiring the use of energy.
  • LO to HI
Term
Light Dependent Reaction
Definition
  • the first stage of photosynthesis, occuring only in the presence of light, during which energy captured from light drives the production of ATP.
Term
Chemiosmosis
Definition
  • A chemical reaction occuring through an intervening semipermeable membrane.
Term
Light independent Reaction
Definition
  • the second stage of photosynthesis, not requiring light to occur, and during which energy released from ATP drives the production of organic molecules from carbon dioxide.
Term
Calvin Cycle
Definition
  • a series of biochemical reactions that takes place in the stroma of chloroplasts in photosynthetic organisms.
Term
Isomer
Definition
  • Any of two or more substances that are composed of the same elements in the same proportions but differ in properties because of differences in the arrangements of atoms.
Term
Bile
Definition
  • A bitter fluid that is secreted by the liver stored in the gall bladder that aids in the emulsification, digestion, and absorption of fats. 
Term
Emulsify
Definition
  • Breaking down substances in order to make more surface area for absorption.
Term
Lipase
Definition
  • An enzyme that hydrolyses fats to glycerol and fatty acids.
Term
Cellular Respiration
Definition
  • The series of metabolic processes by which living cells produce energy through the oxidation of organic substances.
Term
Aerobic Respiration
Definition
  • Themetabolic precess that uses oxygen to break down food and release energy.
  • The energy is uesd to make ATP.
Term
Anaerobic Respiration
Definition
  • the oxidation of molecules in the absense of oxygen to produce energy.
  • Requires another electron acceptor to replace oxygen.
Term
Glycolysis
Definition
  • An ATP generating metabolic process that occurs in nearly all livcing cellsin which glucose is converted in a series of steps to pyruvic acid.
Term
Fermentation
Definition
  • A process of energy production in a cell under anaerobic  conditions. 
Term
Kreb's Cycle
Definition
  • A series of enzymatic reactions in anaerobic organisms incvolving oxidative matabolism of acetylunits and producing high-energy phosphate molecule, whichserves as the main source of cellular energy.
  • Also called the Citric acid cycle.
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