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49 Cards in this Set

  • Front
  • Back
The major systems involved in feedback are the
nervous and endocrine systems
occurs when the body reverses an original stimulus to regain physiologic balance (homeostasis).
Negative feedback
In ________________ the body enhances or intensifies the original stimulus.
positive feedback
The ______________uses the release and action of hormones to maintain homeostasis.
endocrine system
the _____________________regulates homeostasis by sensing system deviations and sending nerve impulses to appropriate organs to restore balance
nervous system
appears mostly as interstitial (tissue) fluid and intravascular (within the blood vessels) fluid
ECF extracellular fluid
is found between the cells
Interstitial fluid
is the watery fluid of the blood known as plasma.
Intravascular fluid
is the fluid inside the cells and constitutes about two thirds of the total body fluid in an adult.
Intracellular Fluid
ICF
is the fluid outside the cells and constitutes about one third of the total body fluid in an adult.
ECF
_______________functions as a stabilizing agent for the parts of the cell. also assists with the transport of nutrients across the cell membrane and in and out of the cell.
ICF intracellular fluid
appears mostly as interstitial (tissue) fluid and intravascular (within the blood vessels) fluid
ECF extracellular fluid
joint cavity
synovial fluid
brain and spinal cord
CFS cerebral spinal fluid
EFC found in eyes
aqueous fluid
also contain specialized EFC
GI tract, liver, billary tract and lymphatic vessels
if EFC is too low....
low blood pressure,
lack of O2/nutrientss to cell,
cells cease to function,
hypo/volemic shock
a set of signs and symptoms that indicate that your vital orans (heart and lungs) are not getting enough oxygen
shock
signs and symptoms of shock
thrist
decreased BP
increased HR
Resp,
clammy skin, pale
_____ the most important fluid in maintaining fluid balance, the body monitors _______ closely and regulates by sending messages
EFC
stimulates thirst center in the hypothalamus
brain
releaases ADH(anti-diurectic hormone)
pituitary gland
when ADH is released ...........
urine production decreases and water reabsorption is increased. Puts more volume in our bloodstream
The thirst center in the _______________stimulates or depresses the desire for a person to drink.
hypothalamus
___________causes secretion of angiotensin I, which is converted to angiotensin II (by an enzyme) in the lungs.
renin
Angiotensin II causes constriction of the blood vessels to increase blood pressure, and the secretion of___________ .
aldosterone
____________controls the reabsorption of sodium by the kidneys in an attempt to increase blood volume. Water “follows” sodium
Aldosterone
soduim reabsorption increases blood volume because water follows salt. known as ______
RAA rennin-angiotensin-aldosterone
(an accumulation of fluid between the pleura of the lungs)
pleural effusion
(an accumulation of fluid within the pericardial sac around the heart).
pericardial effusion
Dehydration can be associated with an increase in _______________such as potassium.
sodium or a disturbance of certain other electrolytes,
Tto try to correct the dehydration, water moves from the
intracellular fluid compartments into the intravascular fluids
Dehydration can also cause severe damage to organs such as the______________ caused by reduced circulating blood volume
kidneys and liver, due to low blood pressure
The nursing diagnosis referring to dehydration is
fluid volume deficit
_________________is an element or a compound that will dissociate into ions (see discussion below) when dissolved in water.
An electrolyte
Body water contains two main types of solutes:
nonelectrolytes and electrolytes.
include proteins, glucose, carbon dioxide, oxygen, and organic acids.
Nonelectrolytes
are solutes that generate an electrical charge when dissolved in water.
Electrolytes
Solutions exerting equal pressures on opposite sides of the membrane are said to be
isotonic
Stronger solutions, compared to those on the opposing side of a membrane, are said to be
hypertonic.
Immersion in a hypertonic solution will result in
shrinkage of blood cells because osmosis will draw fluid out of the cells
Immersion in a hypotonic solution will result in
swelling of blood cells
is an element or a compound that will dissociate into ions when dissolved in water.
An electrolyte
are found in the form of inorganic salts, acids, and bases and are found in all body fluids.
Electrolytes
An atom that has gained or lost one or more electrons is called ________ and has acquired an electrical charge and are in search of a bonding partner
an ion
Some ions have the ability to bond with only one other ion; others can bond with two or more. This ability is expressed in terms of a positive (+) or negative (-) value and is called the .
valence
A positively charged ion is known as a
cation
A negatively charged ion is known as
an anion
A negatively charged ion is known as
an anion