Law Chapter 9 Questions Assignment 2015

Directions: Please answer the following
questions. Each of your responses should
be at least 3 to 5 sentences in
length. And please show your references and works cited.

Chapter 9
Questions:

1. What is the primary duty of a forensic
toxicologist?

2. What are the requirements of a suitable
test for alcohol intoxication?

3. List at least three factors that determine
the rate at which alcohol is absorbed into the bloodstream.

4. Name and describe the process by which
most alcohol is eliminated from the body.
How is the remaining alcohol eliminated and how is this useful in
testing for alcohol?

5. Why is a blood test for alcohol taken
shortly after drinking more advantageous for the suspect than one taken 30
minutes or more after drinking?

6. What was the first successful breath-test
device and what did it measure to determine blood-alcohol concentration? What
is the main difference between this device and the breath-test devices
currently in use?

7. Describe how a fuel cell detector measures
blood alcohol.

8. What is the key to the accuracy of a
breath tester? Describe two steps the operator takes to ensure that this key
requirement is met.

9. What is a divided-attention task? Name and
describe two divided-attention tasks often administered during field sobriety
tests.

10. What is horizontal gaze nystagmus and how
does the test for it reveal blood-alcohol levels?

11. What substances are typically added to blood
that is collected from a subject before it is sent to a toxicology lab, and why
are they added?

12. Why is it best to collect blood samples from
different body sites for postmortem alcohol determination?

13. At what blood-alcohol level is a typical
driver in the United States considered legally intoxicated? At what
blood-alcohol level is a commercial truck or bus driver in the United States
considered legally intoxicated?

14. List two significant challenges a forensic
toxicologist faces when attempting to identify drugs present in a body.

15. What is metabolism and how does it
complicate the task of the forensic toxicologist?

16. Why is it necessary to follow a positive
screening test for drugs with a confirmation test? What is the confirmation
test of choice?

17. A body is found at a fire scene but
investigators are not sure whether the victim was alive when the fire began.
How can measuring the level of carbon monoxide in the victim’s blood help
determine this?

18. What is the A-B-O system? Why is the system
no longer used by forensic scientists?

19. What is an antigen and how is it useful in
individualizing blood?

20. What is an antibody and what happens when an
antibody reacts with its specific antigen?

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