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AB120-Exam 1
Ch. 40 - Campbell
68
Biology
Undergraduate 1
12/14/2009

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Term
anatomy
Definition
study of the structure of an organism
Term
physiology
Definition
study of the functions of an organism
Term
glandular epithelium
Definition
epithelium that absorbs or secretes chemical solutions
Term
simple epithelium
Definition
single layer of epithelium cells
Term
stratified epithelium
Definition
multiple layers of epithelium cells
Term
cuboidal
Definition
cubic shape of a type of epithelial cell
Term
columnar
Definition
column shape of a type of epithelial cell
Term
squamous
Definition
flat, tile-like shap of a type of epithelial cell
Term
connective tissue
Definition
function: bind and support
structure: sparse cells in ECM
Term
collagenous fibers
Definition
tough fiber of ECM; made of collagen; nonelastic; don't tear easily when pulled lengthwise
Term
elastic fibers
Definition
long thread; made of elastin; rubbery quality;
Term
reticular fibers
Definition
very thin and branched; made of collagen; tightly woven fabric continuous with collagenous fibers
Term
fibroblasts
Definition
type of cell in connective tissue that secretes proteins that make of the fibers
Term
macrophages
Definition
functions to destroy microbes
Term
muscle tissue
Definition
made of: long muscle cells; capable of contracting when stimulated
Term
nervous tissue
Definition
made up of neurons and supportive cells
Term
organs
Definition
specialized centers of body function composed of several different types of tissues
Term
mesenteries
Definition
membranes that suspend many of the organs inside fluid-filled body cavities
Term
thoracic cavity
Definition
above the diaphragm, bounded peripherally by the wall of the chest, and contains the heart and lungs
Term
abdominal cavity
Definition
primarily houses parts of the digestive, excretory, and reproductive systems separated by diaphragm from thoracic (mammals only)
Term
organ systems
Definition
groups of organs that work together in forming vital body functions
Term
bioenergetics
Definition
flow of energy through an animal, budget, takes into account: stored, used for basic functions, lost (heat) energy
Term
metabolic rate
Definition
total amount of energy an animal uses in a unit of time
Term
endothermic
Definition
describing organisms that are warmed by metabolic heat; maintain relatively stable body temperature compared to environment
Term
ectothermic
Definition
describing organisms that do not produce enough metabolic heat to effect the body temperature
Term
basal metabolic rate (BMR)
Definition
the metabolic rate of a resting, fasting, nonstressed ENDOTHERM
Term
standard metabolic rate (SMR)
Definition
the metabolic rate of a resting, fasting, nonstressed ECTOTHERM AT A SPECIFIC TEMPERATURE
Term
interstitial fluid
Definition
the fluid filling the spaces between cells in vertebrates
Term
homeostasis
Definition
steady-state physiological condition of the body
Term
regulator
Definition
uses mechanism of homeostasis to moderate internal changes in the face of external fluctuations
Term
conformer
Definition
allows some conditions within its body to vary with certain external changes
Term
negative feedback
Definition
a changes in a physiological variable that is being monitored triggers a response that counteracts the initial fluctuation
Term
positive feedback
Definition
a change in some variable triggers mechanisms that further amplify the change
Term
thermoregulation
Definition
maintenance of internal body temperature within a tolerable range
Term
ectotherms
Definition
must use environmental energy and behaviors to regulate its body temperature (reptiles, fish, or amphibian)
Term
endotherms
Definition
uses metabolic heat to regulate body temperature (mammal, bird)
Term
integumentary system
Definition
outer covering of a mammal's body (skin, hair, nails, feathers, fur)
Term
vasodilation
Definition
increase in the diameter of superficial blood vessels
Term
vasoconstriction
Definition
decrease in the diameter of superficial blood vessels
Term
countercurrent heat exchanger
Definition
arrangement of blood vessels that helps trap heat in the body core and is important in reducing heat loss
Term
nonshivering thermogensis (NST)
Definition
increased production of heat in some mammals by the action of certain hormones that cause mitochondria to increase their metabolic activity and produce heat instead of ATP
Term
brown fat
Definition
tissue in some mammals that is specialized for rapid heat production
Term
acclimatization
Definition
physiological adjustment to a change in an environmental factor
Term
torpor
Definition
a physiologcial state that conserves energy by slowing down metabolism
Term
hibernation
Definition
physiological state that allows survival during long periods of cold and reduced food supplies, in which metabolism dereases, the heart and respiratory system slow down, and body temperature is maintained at a lower level than normal
Term
daily torpor
Definition
daily decrease in metabolic activity and body temperature during times of inactivity for some small mammals and birds
Term
extracellular matrix (ECM)
Definition
substance in which animal tissue cells are embedded, consisting of protein and polysacchatides
Term
Loose connective tissue
Definition
binds epithelia to underlying tissue; functions as packing material or padding; all three fibers
Term
Adipose tissue
Definition
fat tissue; nontypical- nondispersive
Term
Fibrous connective tissue
Definition
high tensile strength; ECM = chondroitin sulfate and collagenous fibers;
Term
Chondrocyes
Definition
secrete matrix for cartilage
Term
Bone
Definition
supporting skeleton of most vertebrates;
Term
Osteoblasts
Definition
secrete matrix for bone (become osteocytes when trapped in matrix)
Term
Osteon
Definition
(Haversian system) concentric layers of mineralized matrix; functional unit of bone
Term
plasma
Definition
liquid matrix of blood in which cells are suspended
Term
blood
Definition
type of connective tissue
Term
Skeletal muscle
Definition
voluntary movements; striated
Term
Cardiac muscle
Definition
heart; striated
Term
smooth muscle
Definition
involuntary movements; unstriated
Term
dendrites
Definition
short, highly branched processes of a neuron that convey nerve impulses toward the cell body
Term
Cell body
Definition
the part of a neuron that houses the nucleus and other organelles
Term
Axon
Definition
long extension, or process, from a neuron that carries nerve impulses away from the cell body toward target cells
Term
Conduction
Definition
direct transfer of heat between environment and body surface (two things in contact)
Term
Convection
Definition
transfer of heat by the movement of air or liquid past a body (wind/flow)
Term
Radiation
Definition
emission of electromagnetic waves produced by all objects (sun)
Term
Evaporation
Definition
loss of heat from body surface due to liquid-gas phase change (cooling only)
Term
Hypothalamus
Definition
part of brain that governs feedback mechanisms for controlling thermoregulation
Term
Estivation
Definition
long-term summer torpor
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