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PBS 1.1.3-1.1.4
| Question | Answer |
|---|---|
| forensic footprints | we naturally leave traces of ourselves wherever we go (like a fingerprint or a hair) |
| digital footprints | info that someone could use to find out about us online based on like what we do online |
| trace evidence | tiny fragments of physical evidence, such as hairs, fibers from clothing or carpeting and pieces of glass |
| Locard's Principle | every time you make contact with another person place or thing, it results in an exchange of physical materials |
| Forensic Technician | they work in a lab or field to process crime scenes based on evidence and stuff |
| growth cycle of hair | anagen (hair grows), catagen (folicle shrinks), telogen (hair sheds), then resting phase and return to anagen |
| root | the part of the hair in the scalp |
| shaft | the part of the hair outside of the scalp |
| identify the parts of a microscope (look in notebook) | did u broski |
| look at common minutiae | did u broski |
| ridge | black lines on the fingerprint that form the pattern |
| core | innermost recurve in the pattern |
| delta | where 3 areas converge into a triangular shape |
| steps of analyzing fingerprints | analysis, comparison, evaluation (either match, no match(exclusion) or inconclusive (you didn't figure it out) |
| latent fingerprint | print left on the surface by the oils of ones skin |
| medulla | the innermost core of the hair shaft |
| cortex | the thick middle layer of the hair shaft |
| cuticle | the outermost protective layer of the hair shaft |
| loop pattern | the ridges curve back on themselves (making a loop) |
| whorl pattern | the ridges are circular or swirly |
| arch pattern | the ridges go up then back down like a mountain |
| digital forensics investigator | they work in many fields and invstigate digital evidence to solve crimes, track hackers and solve security breaches |
| What is in blood? | red and white blood cells, platelets all floating in plasma |
| Why is blood so important? | it keeps oxygen running through us to help our organs work, fight off infection and heal wounds |
| Do all living organisms have blood? | all animals do, but not anything else |
| presumptive testing | tells if a sample is blood or not, based on properties of hemoglobin |
| confirmatory testing | confirms the type of blood |
| is human blood ever blue? | NO |
| what other colors can blood be? | purple in invertebrates, yellow in beetles, green in leeches, |
| erythrocytes- what are they and function | red blood cells-hemoglobin rich, transport oxygen throughout the body, give red color to blood and DO NOT HAVE NUCLEI |
| leukocytes- what are they and function | white blood cells-lack hemoglobin, HAVE A NUCLEUS, they are the immune response ones |
| thrombocytes-what are they and function | they are colorless and disk-like and help clot by attaching to other platelets and damaged epithelium |
| plasma-what is it and function | the liquid that it is all floating in, made of water and wastes |
| Leucocrystal violet | reacts with hemoglobin, will turn a violet color, used on porous surfaces and large areas, not good for a lab |
| luminol | glows bright blue in the dark when it comes in contact with blood, however many other substances will also cause it to react so we don't use it in lab a lot |
| kastle-meyer | the most common presumptive blood test, uses phenolphthalein, which reacts with iron in hemoglobin, it is the one we used in lab |
| positive control | the group that the experimenter expects to have a positive result, shows that the experiment was capable of producing results |
| negative control | an experiment group that produces a negative outcome, help identify outside influences that were not accounted for when the lab was created |
| ABO system | a system of 4 types (A, B, AB, O) which human blood is classified into based on the presence or absence of the antigens and antibodies |
| antigens | anything that stimulates an immune response on the surface of the red blood cells, Y shaped sugars |
| antibodies | the things that will react and make it agglutinate, the immune response almost |
| hemoglobin | a protein found in red blood cells that transports oxygen |
| agglutination | an antibody/antigen reaction, the blood clumps together because the antibodies are fighting it and the blood type doesn't match |
| universal recipient for blood | AB+ |
| universal donor for blood | O- |
| look at table for blood typing and memorize on page 32 | did u do it bruv it's really important |
Created by:
I'mtheAlpha