Chapter 10 Studyguide – Serology



Chapter 10 Studyguide – Serology

Labs are important for this test. You will need to know your vocabulary and which tests we use for which reasons. As Ms. DiNonno frequently says, the fluff is over!

I will give you an overview of the studyguide, but you are best off coming to a study session to prepare for this test. I will hold them before and after school. I am available during mods 3-4 Wednesday through Friday and I do make-up labs in room 317 or 315 during mod 7 on Friday. Schedule a time for labs so I can bring supplies. If you need another time to make up labs, I can do them during mods 10-12 Mon, Tues., and Thurs. Let me know when you want to meet before the test so I can rearrange my other science students and gather supplies.

So here we are…

The test is multiple choice, true-false, matching, and a video component for identifying bloodspatter and transfer stains.

Here is a sampling of what you need to know and apply.

|Type |Antigen |Antibody |Can give blood to|Can get blood |Population of this|Known as | |

| |(outside) |(inside) | |from |type in US | | |

|A |A |B |A, AB |O, A |40% | | |

|B |B |A |B, AB |O, B |11% | | |

|AB |A and B |None |AB |A,B,AB, O |4% |Universal | |

| | | | | | |receiver | |

|O |none |A and B |A,AB,B,O |O |45% |Universal donor | |

Characteristics of blood –

55% plasma; 45% cells

Antigens are proteins on the surface of the blood cell that determines blood type

Antiserum – blood serum containing antibodies

Presumptive tests – can it be blood; can it be another substance

80% of the population are secretors (person whose blood type antigens are found in other bodily fluids)

Hemoglobin found in erythrocyte (red blood cell)

Leukocyte = white blood cell

Thromobcyte = platelet = smallest part; helps with clotting

Rh factor is an antigen found on the red blood cells (erythrocytes)

Shape of the blood spatter will tell the direction of travel

Active bloodstains are those that are made to travel by a force other than gravity

The pointed end of the bloodstain faces the direction of travel, tails of satellite bloodspatter point in the opposite direction of the parent bloodspatter

The harder and less porous the surface; the less the blood drop will break apart

Tests…

Kastle-Meyer – tests for blood

Precipitin – tests tells if human or animal blood; animal has larger nuclei

Luminol – tests for blood (black light – glows)

Hematest – reacts with heme group

Look in your notes for these other vocabulary words. Several words are close in meaning to other words, so know the differences. We will go over these in our study sessions.

Cast off bloodstain

Wipe

Backspatter

Angle of impact

Bloodstain

Area of convergence

Point of convergence

Satellite spatter

Terminal velocity

Swipe

Contact stains

Bloodstain transfers

Transfers (in general)

Directionality

Target

Void (in relation to bloodspatter)

active bloodstains

impact angle = sin-1 (width/length)

ABO blood group = based on having A, B, O or no antigens on the blood cell

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