unit 1 biomed pltw

What is the term used in forensic investigations for the person who has died?

Decedent

What is a person of interest in law enforcement?

Someone who may have information related to a possible crime.

What do physiological responses entail?

Biological reactions to stimuli that can be felt, detected, and/or measured.

What type of questions do polygraph tests use?

Simple yes/no questions.

What was the independent variable in the physiological response experiment?

Lying

What was the dependent variable in the physiological response experiment?

The physiological responses being measured, such as respiratory and heart rate.

What is Locard’s exchange principle?

The hypothesis that a criminal cannot act without leaving traces.

What type of evidence can help tell the story of what happened at a crime scene?

Trace evidence such as hairs, fibers, or pieces of glass.

What are the three main types of cells found in human blood?

Red blood cells, white blood cells, and platelets.

What is presumptive testing?

Initial testing that suggests a sample may be blood.

What does the Kastle-Meyer test detect?

It detects blood using phenolphthalein which reacts with iron in hemoglobin.

What is confirmatory testing?

Testing that uses unique properties of blood to confirm its presence.

What is digital forensics?

A branch of forensic science focusing on evidence found on data-storing devices.

What are red blood cells responsible for?

Transporting oxygen from the lungs to the body's tissues and carbon dioxide from the tissues back to the lungs.

What is the function of white blood cells?

Protecting the body against infections and foreign invaders.

What role do platelets play in the blood?

Facilitating blood clotting to prevent excessive bleeding.