Hair Warm-Up 10/28-10/31 - Robert Ly | Library

Link to Microscope Simulation

Please click on the link and refresh your memory on how to use a light microscope properly!

1

The arrow indicates the part of the microscope that adjusts how much light reaches the slide known as the _______. 

1

Select the coarse adjustment knob!

1

The slide should go on the _______. 

2

Categorize the following scale patterns into 1 of 3 categories.

coronal
spinous
imbricate (flattened)

2

Match the medulla patterns to their corresponding descriptors.

Draggable item		Corresponding Item
		continuous
		intermittent
		fragmented
		absent

1

Hair containing a high concentration of __________ will appear __________.

1

The metabolites of the illicit drug oxycodone are found 7.0 mm from a suspect's hair follicle. Approximately how long ago did the suspect ingest the drug?

_______ round to the nearest whole number of days

1

Human hair grows at the rate of 0.44 mm per day. Use this information to answer the following question.

The body of a woman was found in the woods. Some hair fibers found on the body were sent to the crime lab for analysis. The ends of the hair attached to the body were gray, but the tips of the hair showed that it had been dyed. The distance from the root of the hair to the beginning of the dyed area measured 8 mm.

Investigators determined that the victim’s hair had last been dyed on August 1, 2004. Assuming the hair grows at the rate of 0.44 mm per day, on approximately what date did the woman die? Explain your answer.

_______ (month) _______ (day) _______ (year)

Calculate the medullary index of a hair whose diameter is 110 microns wide and whose medulla measures 58 microns.

1

medullary index = _______ (2 decimal places)

1

Is this hair animal or human? Explain (1 sentence).

1

Determine the medullary index of the hair in the "show your work" section.
_______ (2 decimal places)