Urinary Flashcards
filter waste products from the blood.
Excretion
▪ help regulate the concentration of the major ions, such as Na+, Cl−,
K+, Ca2+ , HCO3 −, and HPO4 2−.
Regulation of the concentration of solutes in the blood
secrete variable amounts of H+ to help regulate the extracellular fluid
pH
Regulation of extracellular fluid pH.
secrete a hormone, erythropoietin
Regulation of RBC synthesis.
play an important role in controlling blood levels of Ca2+
Regulation of vit. D synthesis.
▪ Filter metabolic waste, excess ions, bacterial toxins, water-
soluble drugs, drug metabolites, and water from the blood and
excrete them as urine.
▪ Form urine by filtration, reabsorption, and secretion.
▪ Regulate blood volume, blood pressure (BP), fluid and electrolyte
balance, and acid-base balance
▪ Secrete renin that causes the conversion of angiotensinogen to angiotensin I, which
is subsequently converted to angiotensin II, which stimulates the nephrons to
promote sodium and water retention.
Kidneys
▪ Transport urine produced by the kidneys to the
bladder.
▪ Funnel shaped at the renal pelvis.
▪ Are 10 to 12 inches (25 to 30 cm) in length.
▪ Enter the bladder at the posterior corners of the
bladder floor
Ureters
▪ Receives urine from the ureters.
▪ Stores urine (600 to 1,000 mL) until it is
eliminated.
▪ Urge to eliminate is stimulated by 200
to 250 mL of urine.
Bladder
▪ Transports urine from the bladder and semen
from the prostate gland in males to outside
the body.
▪ Is 1.5 to 2 inches long in a female and 8
inches in a male.
▪ Opens at the urinary meatus.
Urethra
▪ Urine collects in the bladder until pressure
stimulates special sensory nerve endings in the
bladder wall called stretch receptors.
▪ This occurs when the adult bladder contains
between 250 and 450 mL of urine.
▪ In children, a considerably smaller volume, 50 to 200
mL, stimulates these nerves.
URINATION
▪ (or diuresis) refers to the production of abnormally large
amounts of urine by the kidneys, often several liters more
than the client’s usual daily output
POLYURIA
is low urine output, usually less than 500 mL
a day or 30 mL an hour for an adult.
▪ may occur because of abnormal fluid losses or a lack
of fluid intake
▪ often indicates impaired blood flow to the kidneys
Oliguria
refers to a lack of urine production
▪ should be promptly reported to the primary care provide
Anuria
is voiding at frequent intervals, that
is, more than four to six times per day.
Urinary frequency
is voiding two or more times at night.
Nocturia
is the sudden, strong desire to void.
Urgency
means voiding that is either painful or
difficult
Dysuria
(a delay and difficulty in initiating voiding) is associated
with dysuria.
urinary hesitancy