Principles of Biomedical Sciences PLTW
(practice finals test) Exam Questions
with Verified Answers
what's the difference between blood types? - ANSWER-The difference between these
blood types are due to the presence or absence of particular protein molecules called
antigens located on the surface of red blood cells and antibodies circulating in the liquid
portion of blood called plasma
What is hair composed of? - ANSWER-Hair is composed of a protein called keratin
What is keratin? - ANSWER-Keratin is the same protein that forms our nails and our
outer layer of skin.
What are the three layers of the hair shaft? - ANSWER-Hair shafts are composed of
three layers: the cuticle, the cortex, and the medulla.
What is the hair cuticle? - ANSWER-The hair cuticle is the outermost layer of the hair,
and it consists of flattened, scale-like cells which overlap one another.
What is the hair cortex? - ANSWER-The hair cortex is the intermediate layer of the hair.
The cortex is home to the pigment-containing granules responsible for hair color and
contains many of the characteristics used in microscopic analysis of hair.
What is the hair medulla? - ANSWER-The hair medulla is the innermost layer of the
hair. The diameter of the medulla is useful in the identification and comparison process.
Fingerprints - ANSWER-No people, not even identical twins, share the same fingerprint
Arch Patterns - ANSWER-Arches slope upward and then down, like very narrow
mountains.
The plain arch - ANSWER-The plain arch is the simplest fingerprint pattern because it
starts on one side of the finger, cascades upward slightly, and then cascades back
down to the other side of the finger
The tented arch - ANSWER-The tented arch is similar to the plain arch except that the
ridges in the center of the tented arch converge and thrust upward, creating the
appearance of a pitched tent
Loop Patterns - ANSWER-Loops begin on one side of the finger, curve around or
upward, and exit the other side
, What are the two types of loop patterns? - ANSWER-Radial Loops and Ulnar Loops
Radial loops - ANSWER-Radial loops slope towards the thumb
Ulnar loops - ANSWER-Ulnar loops slope towards the little finger
Whorl Patterns - ANSWER-Whorls form circular or spiral patterns
Minutiae - ANSWER-Minutiae are tiny fingerprint ridge details
12 point match - ANSWER-When fingerprints show similarities with at least 12 minutiae
Ending Ridge Minutiae - ANSWER-
Fork minutiae - ANSWER-looks like a two-pronged fork
Short Ridge Minutiae - ANSWER-
Dot Minutiae - ANSWER-looks like a dot
Bridge Minutiae - ANSWER-a bridge between one fingerprint ridge and another
Hook minutiae - ANSWER-A hook protruding from one fingerprint ridge
Eye minutiae - ANSWER-One fingerprint ridge with an empty circle in the middle of the
line
Double fork minutiae - ANSWER-Looks like a two-pronged fork with another prong
protruding from one of the prongs
Delta Minutiae - ANSWER-A fork minutiae with a dot in the middle of it
Triple fork Minutiae - ANSWER-A three-pronged fork
What is rigor mortis? - ANSWER-The stiffening of the muscles after death
What causes rigor mortis? - ANSWER-Lactic acid builds up in the muscles, causing the
stiffening. Since the body is deceased, the cells do not get rid of the lactic acid the same
way as they would in a live body
What is edema? - ANSWER-Retention of fluid
Where is the tibia? - ANSWER-The lower leg
what is DNA? - ANSWER-DNA is a large molecule whose information is stored as a
chemical code. The basic structural unit of DNA is called a nucleotide, which is
(practice finals test) Exam Questions
with Verified Answers
what's the difference between blood types? - ANSWER-The difference between these
blood types are due to the presence or absence of particular protein molecules called
antigens located on the surface of red blood cells and antibodies circulating in the liquid
portion of blood called plasma
What is hair composed of? - ANSWER-Hair is composed of a protein called keratin
What is keratin? - ANSWER-Keratin is the same protein that forms our nails and our
outer layer of skin.
What are the three layers of the hair shaft? - ANSWER-Hair shafts are composed of
three layers: the cuticle, the cortex, and the medulla.
What is the hair cuticle? - ANSWER-The hair cuticle is the outermost layer of the hair,
and it consists of flattened, scale-like cells which overlap one another.
What is the hair cortex? - ANSWER-The hair cortex is the intermediate layer of the hair.
The cortex is home to the pigment-containing granules responsible for hair color and
contains many of the characteristics used in microscopic analysis of hair.
What is the hair medulla? - ANSWER-The hair medulla is the innermost layer of the
hair. The diameter of the medulla is useful in the identification and comparison process.
Fingerprints - ANSWER-No people, not even identical twins, share the same fingerprint
Arch Patterns - ANSWER-Arches slope upward and then down, like very narrow
mountains.
The plain arch - ANSWER-The plain arch is the simplest fingerprint pattern because it
starts on one side of the finger, cascades upward slightly, and then cascades back
down to the other side of the finger
The tented arch - ANSWER-The tented arch is similar to the plain arch except that the
ridges in the center of the tented arch converge and thrust upward, creating the
appearance of a pitched tent
Loop Patterns - ANSWER-Loops begin on one side of the finger, curve around or
upward, and exit the other side
, What are the two types of loop patterns? - ANSWER-Radial Loops and Ulnar Loops
Radial loops - ANSWER-Radial loops slope towards the thumb
Ulnar loops - ANSWER-Ulnar loops slope towards the little finger
Whorl Patterns - ANSWER-Whorls form circular or spiral patterns
Minutiae - ANSWER-Minutiae are tiny fingerprint ridge details
12 point match - ANSWER-When fingerprints show similarities with at least 12 minutiae
Ending Ridge Minutiae - ANSWER-
Fork minutiae - ANSWER-looks like a two-pronged fork
Short Ridge Minutiae - ANSWER-
Dot Minutiae - ANSWER-looks like a dot
Bridge Minutiae - ANSWER-a bridge between one fingerprint ridge and another
Hook minutiae - ANSWER-A hook protruding from one fingerprint ridge
Eye minutiae - ANSWER-One fingerprint ridge with an empty circle in the middle of the
line
Double fork minutiae - ANSWER-Looks like a two-pronged fork with another prong
protruding from one of the prongs
Delta Minutiae - ANSWER-A fork minutiae with a dot in the middle of it
Triple fork Minutiae - ANSWER-A three-pronged fork
What is rigor mortis? - ANSWER-The stiffening of the muscles after death
What causes rigor mortis? - ANSWER-Lactic acid builds up in the muscles, causing the
stiffening. Since the body is deceased, the cells do not get rid of the lactic acid the same
way as they would in a live body
What is edema? - ANSWER-Retention of fluid
Where is the tibia? - ANSWER-The lower leg
what is DNA? - ANSWER-DNA is a large molecule whose information is stored as a
chemical code. The basic structural unit of DNA is called a nucleotide, which is
