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Exam 2 Terms
Exam 2 Study Terms from Powerpoints
50
Physiology
Undergraduate 3
02/19/2008

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Term

Endocrine Disruptor

Definition
a chemical substance, natural or synthetic, that interferes with the endocrine system
Term
agonist
Definition
may mimic actions of natural hormones
Term

antagonist

Definition
may compete for receptor binding sites
Term
CAFOs
Definition
a bunch of animals in a very small space
Term
Central Nervous System (CNS)
Definition
Brain and Spinal Cord
Term
Peripheral Nervous System (PNS)
Definition
everything other than brain and spinal cord
Term
Afferent (sensory) Nervous System
Definition
carries sensory information (input)
Term
Efferent Nervous System
Definition
Carries outgoing information
Term
Autonomic Nervous System
Definition
Involuntary part of NS
Term
Somatic Nervous System
Definition
voluntary part of NS
Term
Cell Processes
Definition
Long Extensions in nerve tissue
Term
Neuron
Definition
excitable cellls that communicate by transmitting electrical impulses
Term
Gated Channel
Definition
control ion permeability of neuron membrane; changes in the potential
Term

Inhibitory

Definition
Hyperpolarizing (goes down)
Term
Excitatory
Definition
depolarizing (goes up)
Term
Krogh Principle
Definition
idea that states, "for a given scientific question, there is an animal for which that question can most conveniently be studied"
Term
Neural Integration
Definition
mechanism by which cells of the NS communicate with and respond to each other
Term
Divergence
Definition
process of going from 1 neuron signal to signal in many neurons
Term
Convergence
Definition
process of going from many signals in many neurons to 1 signal in 1 neuron
Term
Spatial summation
Definition
invitation of action potential from several simultaneous graded potentials
Term
Temporal Summation
Definition
summation that occurs from graded potentials overlapping in time
Term
Brainstem
Definition

brain part that contains nuclei for many autonomic functions and for cranial nerves

Term
Cerebellum
Definition
brain part that processes sensory information to coordinate movements
Term

Diencephalon

Definition
brain part that contains: thalamus, hypothalamus, pituitary gland, and pineal gland
Term

Cerebrum

Definition
brain part that is the site of higher brain functions, such as sensory integration, motor output, language acquisistion, and use
Term
Basal Nuclei
Definition
brain part that is involved in control of movement
Term
Limbic System
Definition
brain part that is involved in emotion, learning, and memory
Term
Phineas Gage
Definition

person that had rod shot through his head

Term
Prospragnosia
Definition
face blindness where you can't recognize/distinguish faces
Term
sleep
Definition
reversible state of physical inactivity characterized by lack of interaction with the external environment
Term
Unihemispheric Slow Wave Sleep (USWS)
Definition
putting one half of the brain to sleep while other half is awake
Term
Learning
Definition
the acqusistion of information
Term
Memory
Definition
the ability to store, retain, and retrieve previously learned information
Term
Non-Associative Learning
Definition
learning after repeated exposures to a single stimulus
Term
Associative Learning
Definition

learning by associating 2 or more stimuli, aka conditioning

Term
Short term (working) Memory
Definition
retention of information for seconds to minutes; is an upper limit of 7 to 12 things that can keep at once
Term
Long-Term (reference) Memory
Definition
retention for days to years; no apparent upper limit
Term
Consolidation
Definition
Conversion of short-term to long-term memory
Term
Memory Traces
Definition
Storage areas of long-term memory
Term
Receptive Aphasia
Definition
damge to Wernicke's area, leads to inability to process language input
Term
Expressive Aphasia
Definition
damage to Brocca's area, leads to inability to process language output (input is okay)
Term
Sensation
Definition
input, both external and internal, from PNS to CNS
Term
Perception
Definition
the conscious interpretation of input from our external and internal environments
Term
Transduction
Definition
the conversion of energy from one form to another (stereo, television, etc)
Term
Sensory Transduction
Definition
the conversion from stimulus energy to electrical energy (chanes in receptor potential, production of graded potentials, etc.)
Term
Sensory Coding
Definition
the ability of the NS to identify the type, strength, and location of a stimulus
Term
Receptive Field
Definition
area over which a stimulus can be detected by a given sensory neuron
Term
Acuity
Definition
precision with which a stimulus location can be perceived
Term
Lateral Inhibition
Definition
inhibition of neighboring receptor activity in the presence of a strong stimulus; increases acuity
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