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medical terminology
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199
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04/25/2005

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Term
central nervous system
Definition
brain, spinal cord
Term
afferent nerves
Definition
carry impulses from tissues toward the CNS...AKA sensory nerves
Term
efferent nerves
Definition
carry impulses from the CNS to tissues...AKA motor nerves
Term
neur/o
Definition
combining form for nerve
Term
neurosclerosis
Definition
hardening of nerve tissue
Term
neurons
Definition
conduct impulses to or from the nervous system....structural and functional part of the neurvous system....AKA nerve cells
Term
neuroglia
Definition
provides special support and protection
Term
axon
Definition
conducts impulses away from the cell body
Term
myelin sheath
Definition
insulates the axon.....allows nerve transmissions to move faster...undeveloped in the very young
Term
dendrite
Definition
conducts impulses toward the cell body
Term
synapse
Definition
gap between two neurons....decision making process occurs here
Term
-plegia
Definition
suffix meaning paralysis
Term
hemiplegia
Definition
paralysis of one side of the body
Term
quadriplegia
Definition
paralysis of all four limbs
Term
Paraplegia
Definition
paralysis of the lower limbs
Term
Encephal/o
Definition
combining form for brain
Term
myel/o
Definition
combining form for bone marrow and spinal cord
Term
encephalomyelitis
Definition
inflammation of the brain and spinal cord
Term
cerebrum
Definition
center of mental facilities and voluntary muscle activity... interprets messages from the sense organs
Term
cerebro
Definition
combining form for cerebrum or brain in general
Term
Parts of the brain
Definition
cerebrum, cerebellum, brain stem, diencephalon
Term
cerebell/o
Definition
combining form for cerebellum
Term
spinal cord
Definition
located in the canal of the vertebral column... 31 pairs of spinal nerves branch off the spinal cord between the vertebrae
Term
sciatic nerve
Definition
spinal nerve arising from the sacral nerves on either side.... largest nerve in the body
Term
meninges
Definition
collective name of 3 membranes that provide protection for the brain and spinal cord....dura mater, arachnoid membrane, pia mater
Term
mening/o
Definition
combining form for the meninges
Term
cerebrospinal fluid
Definition
bathes the brain and spinal cord....serves as a shock absorber
Term
aneurysm
Definition
ballooning out of the wall of a blood vessel...usually an artery...rupture of the aneurysm is dangerous and potentially fatal.
Term
narcolepsy
Definition
seizure or sudden attack of sleep
Term
narc/o
Definition
combining form for sleep
Term
-lepsy
Definition
suffix meaning seizure
Term
ALzheimer's Disease
Definition
Atrophy of areas of the cerebrum...progressive and irreversible....characteristics of presenile dementia
Term
Amylotrophic Lateral Sclerosis
Definition
AKA. ALS or Lou Gehrig's disease....marked by muscular weakness and atrophy...degeneration of motor neurons of the spinal ord
Term
cerebral palsy
Definition
bilateral, symmetrical, nonprogressive paralysis....results from developmental defects or trauma at birth.
Term
dyslexia
Definition
thought to be a CNS defect...inability to read, spell and write words despite the ability to see and recognize letters.
Term
Multiple Sclerosis
Definition
progressive destruction of the myelin sheaths of nerves
Term
Parkinson's Disease
Definition
muscular weakness and rigidity....tremors..caused by a fine, slowly spreading tumor.
Term
fever
Definition
increased body temperature due to infectious organism
Term
fever
Definition
increased body temperature due to infectious organism
Term
pyrogen
Definition
substance that produces fever
Term
Peripheral Nervous System
Definition
Made up of the various nerve processes that connect the brain and spinal cord w/ receptors, muscles and glands.
Term
Afferent or sensory
Definition
Relays info from receptors to the brain
Term
Efferent or motor
Definition
Conveys info back to the glands and muscles.
Term
Somatic
Definition
Responsible for voluntary movement
Term
Autonomic
Definition
responsible for involuntary response....heart rate, breathing, digestion, etc.
Term
sympathetic
Definition
responsible for changing certain factors
Term
parasympathetic
Definition
responsible for returning changed factors back to resting values
Term
Acetylcholine
Definition
responsible for relaxation messages
Term
Epinephrine
Definition
responsible for stimulation messages...AKA adrenaline
Term
Myopia
Definition
near sightedness
Term
Hyperopia
Definition
far sightedness
Term
Astigmatism
Definition
Distortion of the lens or cornea
Term
Otitis
Definition
Inflammation of the ear
Term
Audi/o
Definition
combining form for hearing
Term
Photoreceptors
Definition
detect light...found in eye
Term
chemoreceptors
Definition
respond to chemicals...found in the nose and tongue.
Term
-phylaxis
Definition
suffix meaning protection
Term
Prophylaxis
Definition
prevention of disease
Term
Algesi/o
Definition
Combining form for sensitivity to pain
Term
hyperalgesia
Definition
increased pain sensitivity
Term
psychiatry
Definition
medical specialty dealing w/ diagnosis, treatment and prevention of mental illness.
Term
psychologist
Definition
Non-medical person trained in the methods of psychological analysis.
Term
Psych/o, Ment/o, and Phren/o
Definition
Combining forms for mind
Term
Psychotherapy
Definition
treatment of mind disorders
Term
Dementia
Definition
loss of mind function
Term
Schizophrenia
Definition
type of psychosis characterized by loss of contact w/ the environment and disintegration of the personality.
Term
-mania
Definition
suffix meaning intense preoccupation
Term
Maniac
Definition
one afflicted w/ mania
Term
pyromania
Definition
excessive preoccupation w/ fires
Term
Manic-Depressive
Definition
Characterized by great mood swings...individuals go through very highs and very lows.
Term
-phobia
Definition
suffix meaning abnormal fear
Term
hydrophobia
Definition
intense fear of water
Term
consciousness
Definition
Responsiveness of the mind to the impressions made by the senses.
Term
semi-
Definition
Prefix meaning half or partly
Term
semiconscious
Definition
person is only partially conscious
Term
paranoia
Definition
Persistent delusions of persecution, mistrust and combativeness.
Term
Contra-
Definition
Prefix meaning against or opposed
Term
The Integumentary System
Definition
Body covering or skin
Term
Function of the skin
Definition
Protection of delicate tissues. Insulator and temperature regulator. Eliminates body waste (e.g. in sweat). Protective against harmful rayas of the sun. Receptors respond to: Touch, cold, heat, pain and pressure.
Term
layers of the skin
Definition
dermis. epidermis - located above the dermis
Term
Epidermis
Definition
4-5 layers. Palms and soles contain the most layers. Outermost layer consists of non-living cells that are constantly shed and replaced.
Term
Keratin
Definition
Protein found in the shed cell layer of the epidermis
Term
Kerat/o
Definition
combining form for keratin - means horny
Term
Keratosis
Definition
horny growth on skin
Term
Dermis
Definition
Thicker inner portion of the skin. Contains numerous blood vessels, nerves and glands. Hair follicles are embedded here. Layers: Endoderm - innermost layer, Mesoderm - middle layer. Arrangement of the demis allows for ridges on the skin. -fingerprints
Term
Meso-
Definition
prefix meaning middle
Term
Cutane/o, Derm/a, and Dermat/o
Definition
Combining forms for the skin
Term
Subcutaneous
Definition
under the skin
Term
Dermabrasion
Definition
physical sanding of the skin
Term
Dermatitis
Definition
inflammation of the skin
Term
Rhytid/o
Definition
combining form for wrinkles
Term
Rhytidectomy
Definition
removal of excess skin (wrinkles) by plastic surgery. AKA Facelift
Term
Pus
Definition
Product of infection
Term
Py/o
Definition
combining form for pus
Term
abscess
Definition
localized collection of pus
Term
Septicemia
Definition
Presence of pathogenic organisms in the blood
Term
pyemia
Definition
formation of septicemia formed by the presence of pus-forming organisms
Term
Structures Associated w/ Skin
Definition
Hair, Nails, Sebaceous Glands, Sweat Glands
Term
hair
Definition
protects various structures..head hair - protects scalp, nose hair - protects lungs and throat from irritation...distribution of hair between males and females is hormonally determined
Term
Trich/o
Definition
Combining form for hair
Term
Trichosis
Definition
abnormal condition of the hair
Term
puberty
Definition
time of hair growth in armpits and pubic region in both males and females
Term
Axill/o
Definition
combining form for axilla or armpit
Term
Hair Root
Definition
Embedded in the dermis and is the portion of the hair below the surface
Term
Alopecia
Definition
Baldness or loss of hair
Term
Goose Bumps
Definition
AKA pilorection...Arrector pili muscles contract under stresses of cold or fright and this straightens and raises the hair follicles
Term
Sebaceous Glands
Definition
Produce sebum, the oily substance responsible for lubricating the skin
Term
Sebum
Definition
keeps hair from getting dry and brittle and forms a protective layer on the skin...Widely distributed over the body.
Term
Seb/o
Definition
combining form for sebum
Term
seborrhea
Definition
excessive flow of sebum
Term
Sweat Glands
Definition
AKA sudoriferous glands...produce sweat or perspiration..eliminate waste and regulate body temp.
Term
Sweat
Definition
Evaporation of sweat cools the body
Term
Hidr/o
Definition
combining form for sweat
Term
Hidraden/o
Definition
combining form for sweat gland
Term
Diaphoresis
Definition
Term used to describe excessive sweating
Term
Therm/o
Definition
combining form for heat
Term
hypothermia
Definition
below normal body temperature
Term
Finger and toe nails
Definition
Composed of keratin
Term
Onych/o
Definition
combining form for the nails.
Term
Onychectomy
Definition
removal of a nail
Term
Albinism
Definition
Partial or total absence of skin pigment...Present at birth.
Term
Alb/o and albin/o
Definition
combining forms that mean white
Term
Ichthyosis
Definition
skin is dry and scaly
Term
Ichthy/o
Definition
combining form for fish that is also used here.
Term
Xeroderma
Definition
mild form of non-hereditary ichthyosis characterized by dry skin
Term
Xer/o
Definition
combining form for dry
Term
Macules
Definition
non-raised discolored spots on the skin
Term
Nodule and Papule
Definition
Both are raised and not discolored, but a nodule penetrates deeper into the dermis than a papule.
Term
Cyst
Definition
Closed sac or pouch having a definite wall and containing fluid, semifluid, or solid material.
Term
Hives
Definition
Vascular reaction resulting in raised skin over a large area (plaque) accompanied by itching...Usually the result of an allergic reaction.
Term
Blisters
Definition
Raised, fluid filled lesions usually caused by friction
Term
Fissures
Definition
clefts, cracks, or slits in the skin
Term
Burns
Definition
injuries resulting from excessive exposure to thermal, chemical, electrical or radioactive agents...classified according to their depth.
Term
scar
Definition
mark left by the healing of a lesion where excess collagen was produced to replace injured tissue.
Term
Decubitus Ulcers
Definition
AKA bed sores...Caused by prolonged pressure from lying in the same position for too long a time.
Term
Skin Cancer
Definition
Most cureable type of cancer if detected early
Term
Verruca
Definition
AKA cutaneous warts...elevated areas of the epidermis caused by a virus.
Term
Plantar wart
Definition
Occurs on pressure bearing areas...particularly common on the plantar surface (sole) of the foot.
Term
Dermatomycosis
Definition
fungal infection of the skin
Term
Histolysis
Definition
Disintegration of tissue
Term
Historrhexis
Definition
rupture of tissue
Term
Heliotherapy
Definition
Treatment of disease by exposin the body to the sun.
Term
Heli/o
Definition
combining form for the sun
Term
Necrotic
Definition
dead tissue
Term
Necr/o
Definition
combining form for dead
Term
Asepsis
Definition
Sterile, free from infection
Term
Topical Medications
Definition
medications placed directly on the skin
Term
oral medications
Definition
taken by mouth
Term
sublingual
Definition
medications placed under the tongue and allowed to dissolve
Term
Parenteral
Definition
Medication injected anywhere but the alimentary canal
Term
Dia-
Definition
Prefix meaning through
Term
Diathermy
Definition
passing a high frequency current through tissue to generate heat in a particular area of the body.
Term
Trans-
Definition
Prefix meaning across or through
Term
Transcutaneous
Definition
across the skin
Term
The endocrine system
Definition
Composed of ductless glands that release hormones into the blood stream
Term
endo-
Definition
means inside
Term
crine
Definition
means to secrete
Term
Hormones
Definition
Chemical substances secreted into the bloodstream and carried to another part of the body where they exert specific physiological effects.
Term
Hypoproduction
Definition
deficiency in production
Term
hyperproduction
Definition
excess production
Term
exocrine glands
Definition
have ducts and empty onto an external or internal body surface -sweat and salivary glands....not part of the endocrine system.
Term
The pituitary gland: The Master Gland
Definition
AKA hypophysis...attached by a stalk to the hypothalamus...Divided functionally into an anterior and posterior lobe.
Term
Anterior Lobe
Definition
AKA adenohypophysis...glandular part of the hypophysis..hormone release from the anterior lobe is controlled by regulating hormones from the hypothalamus.
Term
Posterior lobe
Definition
AKA neurohypophysis....contains the ends of neurons whose cell bodies are located in the hypothalamus....Releases hormones when stimulated by nervous impulses from the hypothalamus.
Term
Antidiuretic Hormone
Definition
affects the volume of urine excreted...action is reabsorbing water from the kidneys, producing a concentrated urine.
Term
oxytocin
Definition
released in large quantities just before a female gives birth.. Causes uterine contractions...Also acts on mammary glands to stimulate the release of milk.
Term
Mammary Glands
Definition
milk is drained by the lactiferous duct
Term
mamm/o and mast/o
Definition
combining forms for breast
Term
Colostrum
Definition
cloudy fluid produced the 1st few days after birth.
Term
lactation
Definition
secretion of milk
Term
prolactin
Definition
hormone that produces milk
Term
mammogram
Definition
used to detect breast cancer
Term
Functions of the Adenohypophysis
Definition
Releases several hormones that regulate a large range of body activities...most of these hormones stimulate other glands.
Term
Trop/o
Definition
means to stimulate or turn
Term
-tropic
Definition
means to stimulate
Term
Pituitar/o
Definition
combining form for pituitary gland
Term
Hypopituitarism
Definition
pituitary insufficiency
Term
Hyperpituitarism
Definition
overactive pituitary gland
Term
Human Growth Hormone
Definition
AKA somatotropic hormone or somatotropin...Stimulates the body's growth.
Term
Thyrotropic Hormone
Definition
stimulates the thyroid
Term
Thyr/o and Thyroid/o
Definition
combining forms for thyroid
Term
Hyperthyroidism
Definition
leads to increased metabolic rate
Term
Goiter
Definition
enlarged thyroid
Term
Hypothyroidism
Definition
leads to cretinism
Term
cretinism
Definition
characterized by arrested physical and mental development
Term
Parathyroids
Definition
four small endocrine glands that regulate calcium and phosphorous metabolism
Term
Gonads
Definition
Refer the the ovaries and testes
Term
Adrenal Glands
Definition
lie above each kidney....Two parts: Adrenal medulla, and adrenal cortex..hormone secreted by the adrenohypophysis that stimulates the adrenal cortex is adrenocorticotropic hormone (ACTH)
Term
Adren/o and Adrenal/o
Definition
combining forms for the adrenal glands
Term
Mineralocorticoids
Definition
help control water and electolyte homeostasis
Term
Glucocorticoid hormones
Definition
concerned w/ normal metabolism and resistance to stress
Term
Androgens
Definition
Influence the development of the masculine sex characteristics
Term
estrogen
Definition
feminizing hormone
Term
homeostasis
Definition
tendency toward stability of the internal environment of the body
Term
Home/o
Definition
means sameness or constant
Term
Pancreas
Definition
Both an exocrine and endocrine gland
Term
Islets of Langerhans
Definition
produce insulin
Term
pineal gland
Definition
believed to be an endocrine gland..function unknown
Term
Thymus gland
Definition
function is related to immunity.
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