Models of Human Nature and Therapeutic Change

Biological (Medical) Model The mind’s activity depends on the brain whose composition is genetically determined Still acknowledge influences of environment and learning Genetic influences on anxiety and depression Brain structure different in individuals with schizophrenia- process information differently Therapy: Pharmacological treatments (medication) Behavioural Model Focuses on what people do rather than on brain structures and/or…

Speciation: Prezygotic and Postzygotic Barriers

Species: Latin word meaning “kind” Speciation: The origin of new species Macroevolution: The evolutionary changes above the species level eg. Appearance of feathers during the evolution of birds from one set of dinosaurs Anagenesis – one species over time becomes another species Cladogenesis– one species, over time, splits and becomes two species Morphogensis– look at…

Cellular Membranes: Fluid Mosaic of Lipids and Proteins

Selective Permeability: Allows some substances to cross it more easily than others. A phospholipid is an amphipathic molecule, meaning is has both a hydrophilic region and a hydrophobic region. Fluid Mosaic Model: The membrane is a fluid structure with a “mosaic” of various proteins embedded in or attached to a double layer (bilayer) of phospholipids.…

Biology: The Evolution of populations

Microevolution: The change in the genetic makeup of a population from generation to generation Mendel’s model: the particulate hypothesis of inheritance Quantitative characteristics: characteristics of a population that vary along continuum. Eg. Fur length in mammals Population genetics: study of how populations change genetically over time. Modern synthesis: a comprehensive theory of evolution that integrated…

Metabolism & Enzyme Regulation

Metabolism is the combined sum of the chemical reactions that occur in living organisms. Metabolism is traditionally divided into catabolism, or the breaking down of large molecules into smaller ones, and anabolism, or the combining of small molecules to make larger ones. Metabolic pathways are coordinated series of reactions, catalyzed by enzymes and designed to…

Pesticides & Naled: Environmental Impact, Legislation, Costs

With environmentalists constantly searching for a safer insecticide to deal with those pesky mosquitoes, naled has often been the choice for many. Having been registered for use since 1959 in the United States, about one million pounds of the organophosphate pesticide have been used every year with seventy percent used towards mosquito control. Primarily produced…

Major Hormones: Origin, Target, Function

HORMONE GLAND ORIGIN TARGET TISSUE FUNCTION Adrenocorticotropic Pituitary gland (anterior) Adrenal cortex Triggers secretion of hydrocortisone from the adrenal gland Growth hormone Pituitary gland (anterior) Throughout body Stimulates growth and development Follicle-stimulating hormone Pituitary gland (anterior) Sex glands Stimulates female egg maturation and male sperm production Luteinizing hormone Pituitary gland (anterior) Sex glands Stimulates female…

DDT: Properties, Uses, WHMIS

Common Names: Anofex, Cesarex, Chlorophenothane, Dedelo, p, p’-DDT, Dinocide, Didimac, Digmar, ENT 1506, Genitox, Guesapon, Guesarol, Gexarex, Gyron, Hildit, Ixodex, Kopsol, Neocid, OMS 16, Micro DDT 75, Pentachlorin, Rukseam, R50 and Zerdane. Physical Properties of DDT – Created by the reaction of trichloroethanol with chlorobenzene – Stable, Nonflammable, Combustible molecule – Able to perform substitution…