Hair and Fiber Review

The region of a hair located outside of the medulla containing granules of pigment. (wood part of pencil in our example)

• Cuticle

• Medulla

• Cortex

The tough outer covering of a hair composed of overlapping scales. (outer part of pencil in our example)

• Cortex

• Cuticle

• Medulla

Fibers are classified as either:

• natural fibers or synthetic fibers.
• polymers or synthetic fibers.
• acrylic fibers or plant fibers.
• olefins or synthetic fibers

Tags

NGSS.MS-PS1-3

comparison microscope

• the central core of a hair fiber

• material that connects an individual or thing to a certain group

• the tough outer covering of a hair composed of overlapping scales

• a compound microscope that allows the side by side comparison of the samples, such as of hair or fibers

cuticle

• the central core of a hair fiber

• material that connects an indivisual or thing to a certain group

• a type of fibrous protein that makes up the majority of the cortex of a hair

• the tough outer covering of a hair composed of overlapping scales

hair follicle

• the actively growing root or base of hair containing DNA and living cells

• material that connects an individual or thing to a certain group

• a type of fibrous protein that makes up the majority of the cortex of a hair

• the tough outer covering of a hair composed of overlapping scales

Tags

NGSS.MS-LS1-3

The protein that makes up hair is called _____

• ninhydrin
• pigments 
• medulla
• keratin

Tags

NGSS.MS-LS3-1

To determine the medullary index, you would ______.

• measure the diameter of the medulla and divide it by the diameter of the hair

• measure the diameter of the hair and add it to the diameter of the medulla

• measure the length of the medulla and divide it by the length of the hair

• measure the diameter of the medulla and multiply it by the diameter of the cortex

Where is Nuclear DNA found in the hair?

• hair shaft

• root or follicle

• tip

• medulla

Natural fibers can be harvested from

• plants and animals only

• plants, animals and minerals

• animals only

• plants only