PLTW HBS Midterm Exam Questions with Correct Answers
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PLTW HBS
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PLTW HBS
PLTW HBS Midterm Exam Questions with Correct Answers
Peripheral nervous system - Answer-The part of the nervous system that is outside the central nervous system and comprises the cranial nerves excepting the optic nerve, the spinal nerves, and the autonomic nervous system.
Lobe - Answer-A divi...
PLTW HBS Midterm Exam Questions
with Correct Answers
Peripheral nervous system - Answer-The part of the nervous system that is outside the
central nervous system and comprises the cranial nerves excepting the optic nerve, the
spinal nerves, and the autonomic nervous system.
Lobe - Answer-A division of a body organ (as the brain, lungs, or liver) marked off by a
fissure on the surface.
Limbic System - Answer-A group of subcortical structures (as the hypothalamus, the
hippocampus, and the amygdala) of the brain that are concerned especially with
emotion and motivation.
Restriction fragment length polymorphisms (RFLPs) - Answer-Differences in DNA
sequence on homologous chromosomes that can result in different patterns of
restriction fragment lengths (DNA segments resulting from treatment with restriction
enzymes).
Restriction enzyme - Answer-A degradative enzyme that recognizes specific nucleotide
sequences and cuts up DNA.
Gel electrophoresis - Answer-The separation of nucleic acids or proteins, on the basis
of their size and electrical charge, by measuring their rate of movement through an
electrical field in a gel.
Deoxyribonucleic acid (DNA) - Answer-A double-stranded, helical nucleic acid molecule
capable of replicating and determining the inherited structure of a cell's proteins.
Biometrics - Answer-The measurement and analysis of unique physical or behavioral
characteristics (as fingerprint or voice patterns) especially as a means of verifying
personal identity.
Gyrus - Answer-A convoluted ridge between anatomical grooves.
Cerebrum - Answer-The dorsal portion, composed of right and left hemispheres, of the
vertebrate forebrain; the integrating center for memory, learning, emotions, and other
highly complex function of the central nervous system.
Cerebellum - Answer-A large dorsally projecting part of the brain concerned especially
with the coordination of muscles and the maintenance of bodily equilibrium, situated
, between the brain stem and the back of the cerebrum and formed in humans of two
lateral lobes and a median lobe.
Central nervous system - Answer-The part of the nervous system which in vertebrates
consists of the brain and spinal cord, to which sensory impulses are transmitted and
from which motor impulses pass out, and which supervises and coordinates the activity
of the entire nervous system.
Action Potential - Answer-A momentary reversal in electrical potential across a plasma
membrane (as of a nerve cell or muscle fiber) that occurs when a cell has been
activated by a stimulus.
Synapse - Answer-The place at which a nervous impulse passes from one neuron to
another.
Reflex - Answer-An automatic and often inborn response to a stimulus that involves a
nerve impulse passing inward from a receptor to the spinal cord and thence outward to
an effector (as a muscle or gland) without reaching the level of consciousness and often
without passing to the brain.
Reaction Time - Answer-The time elapsing between the beginning of the application of
a stimulus and the beginning of an organism's reaction to it.
Neurotransmitter - Answer-A substance (as norepinephrine or acetylcholine) that
transmits nerve impulses across a synapse.
Anterior - Answer-Situated toward the front of the body
Deep - Answer-Away from the body surface; more internal
Directional Terms - Answer-Terms used to explain where one body structure is in
relation to another
Distal - Answer-Situated away from the point of attachment or origin or a central point;
located away from the center of the body
Dorsal - Answer-Being or located near, on, or toward the back or posterior part of the
human body
Identity - Answer-The distinguishing character or personality of an individual
Inferior - Answer-Situated below and closer to the feet than another and especially
another similar part of an upright body especially of a human being
Lateral - Answer-Of or relating to the side; especially of a body part
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