Week 6 Flashcards
Elimination
removal, clearance, or separation of matter
excretion of waste product
how does the human body eliminate waste
through skin, kidneys, lungs, and intestines
Bowel elimination
the process of expelling stool (feces)
a term used to describe the process of bowel elimination
defecation, defecate, or bowel movement
urine elimination
the process of expelling urine
what terms is used to describe urine elimination
micturition
urination
continence
the purposeful control of urinary or fecal elimination
impaired elimination
one or more problem associated with the elimination process
anuria
absence of urine
dysuria
painful urination
polyuria
multiple episode of urination (diabetes)
urinary frequency
multiple episodes of urination with little urine produced in a short period of time.
urinary hesitancy
the urge to urinate exists, but the person has difficulty starting the urine stream
Kidney’s role in elimination
removal of metabolic waste and other element from the blood in the form of urine
what is the role of the gastrointestinal tract in the process of elimination
responsible for the removal of digestive waste in the form of stool
urinary elimination involve what structures?
the kidney
ureters
bladder
urethra
main functional unit of the kidneys?
the nephron
nephron
the main functional unit of the kidney
what are the nephron composed of?
blood vessels and renal tubules
formation of urine involves what 3 processes
glomerular filtration
tubular reabsorption
tubular secretion
where does the blood enter the kidney?
renal artery then branches into smaller arteries, arterioles, and finally a cluster of capillary known as glomerulus
glomerulus
semi-permeable membrane that serves to filter the blood into a C-shape structure of the renal tubule know as the Bowman’s capsule
what represent the beginning of urine formation
glomerular filtration
what does filtrate contain
water
electrolyte
waste
all removed blood
what does the filtrate pass through?
a sequence of renal tubules (Bowman’s capsule to the proximal convoluted tubule, the loop of Henle, and the distal convoluted tubule.
where does the water in the filtrate gets absorb?
a network of capillaries surrounding the renal tubules reabsorb most of the water, electrolytes, and other necessary element back into the blood.
also known as tubular reabsorption
tubular secretion
secondary process in which substances (potassium, hydrogen, ammonia, and drugs) moved from the blood in the capillaries surrounding the tubules into the tubules.
the amount of electrolytes reabsorbed into the blood or exreted int he renal tubules is controlled by what hormones?
aldosterone
antidiuretic hormone
parathyroid hormone
renin
atrial naturiuretic factor
after the renal tubules, where does the urine go?
moves into the collecting duct and then into the renal pelvis, the ureter, and the bladder where it is stored until urination occur
how many mL does the bladder hold in adults?
300 to 500 mL
what does pressure in the bladder stimulate?
stimulate stretch receptors in the bladder wall
receptors send impulses through the spinal cord to signal the need for urination.
what prevents urine from leaking out of the bladder?
internal sphincter, composed of involuntary smooth muscle
external sphincter
located below the internal sphincter and surrounding upper urethra
made of voluntary skeletal muscle
micturition reflex
cause the internal sphincter to relax and the bladder wall to contract.
relaxation of the external sphincter, urine pass through the urethra.
continence
control of urinary control
what is the function of the gastrointestinal system?
breakdown and absorption of nutrient from food ingested and the elimination of waste in the process
extends from mouth to the anus
what is the first part of the GI tract consist of?
mouth, esophagus, stomach, and small intestine
involved in digestion and absorption of nutrients
what other organ is also included in digestive organ?
liver
gall bladder
pancreas
where does waste formation occur
in the colon
what are waste product called
stool or feces
what is waste product made of?
water
bile
undigested food matter
unabsorbed mineral
bacteria
mucous
epithelial cells from the lining of the intestine
what helps fecal matter move through the GI tract?
smooth muscle within intestinal tract stimulate peristalsis
how long is the large intestine?
5 or 6 feet long and 2 inches in diameter
how many part is the large intestine made of?
(4) cecum (appendix)
colon
rectum
anus
what is the function of the large intestine?
absorb water and electrolyte as fecal matter move through its walls
what helps lubricate the walls in the intestine?
mucus
help aid in expulsion of the stool
if excessive peristalsis and stool move through quickly, less water is absorbed resulting in loose stool
defecation
process of expelling stool
involves voluntary and involuntary muscle
at what age do children be able to identify the urge to urinate and defecate?
18 to 24 months
when are children ready to potty train
2-3 years
what age does renal bloodflow reduce?
80 years
how much is bloodflow reduced to in later years?
600mL
reason why nephron function is reduced to 50%?
change in the size of the kidney due to age and sclerosis
absence of disease, reduction in renal reserve makes older adult more susceptible to electrolyte imbalace and kidney damage due to medications
what happen to bladder due to age?
bladder retains tone
volume of urine decrease causing urine frequency
urethra becomes weak, increase risk of incontinence
what happens to bowel due to age?
atrophy of smooth muscle layer in colon reduced mucous secretion
reduced tone of internal and external sphincter
reduced neural implulses, more susceptible to constipation or incontinence.
what contributes to urinary and GI function?
incontinence
retention
discomfort
infection
inflammation
neoplasms
organ failure
incontinence
loss of control of either urine or bowel elimination
what does incontinence lead to?
skin break down
changes in daily activity, functional activity, and social relationship
urinary incontinence
disruption in the storage or emptying of the bladder with involuntary release of urine usually associated with dysfunction of the external and/or internal urinary sphincters
fecal incontinence
involuntary passage of stool and ranges from an occasional leakage of stool while passing gas to complete loss of bowel control
retention
unintentional retention of urine or stool
associated with obstruction, inflammation, or ineffective neuromuscular activation within the bladder or GI tract
type of incontinent
stressed -leakage of small amount during physical movement
urge-large amt unexpected at times, including sleep
overactive bladder- frequency and urgency with or without urge incontinence
functional- untimely urination because of physical disability, external obstacle, or cognitive
overflow- leakage due to full bladder
mixed- stress and urge incontinence together
transient - leakage the will temporarily passed (infection or taking new med)
what happens as a result of constipation?
difficult passage of hard, dry stool
loss of appetite
discomfort
fecal impaction
largest cavity in the human body?
abdominal cavity
what does the abdominal cavity contain?
- stomach
- small/large intestine
- liver
- gall bladder
- pancreas
- spleen
- kidneys
- ureters
- bladder
- adrenal glands
- major vessels
what is the abdominal lining called
peritoneum
what is the peritoneum made of?
serous membrane forming a protective cover.
how many layers is the peritoneum divided into?
two:
parietal peritoneum - lines abdominal wall
visceral peritoneum - covers organs
what is the space between the parietal peritoneum and the visceral peritoneum called?
peritoneal cavity
contains small amount of serous fluid to reduce friction between abdominal organs
what muscle is found in the anterior border of the abdomen
rectus abdominis
what is found on the posterior border?
the vertebral column and lumbar muscle
what provides lateral support to the stomach
internal and external oblique muscle
what muscle lies under the oblique?
transverse abdominis
Linea alba
a tendinous band that protect the midline of the abdomen between the rectus abdominis muscle.
extends from xiphoid process to symphysis pubis
how long is the alimentary tract
27 feet
what does the alimentary tract include?
- mouth
- esophagus
- stomach
- small/large intestine
- rectum
- anal canal
what is the main function of the alimentary tract?
ingest and digest food
absorb nutrients, electrolyte, and water
excrete waste products.
peristalsis
controlled by ANS and wave-like movements that moves food along the digestive tract
where does the breakdown of carbs begin?
in the mouth
how long is the esophagus?
about 10 inches
what does the esophagus connect?
connect the pharynx to the stomach
found posterior to the trachea
what is used to breakdown protein and fats in the stomach?
digestive enzymes and hydrochloric acid
turns food into chyme and propels it to the duodenum
what is the pH of the stomach?
2.0-4.0
what regulates outflow of chyme into the duodenum
pyloric sphincter
what produce bowel sounds?
the movement of air and fluid through he stomach and small/large intestine.
what is the largest alimentary tract?
small intestine
about 21 feet.
where does the small intestine begin and end?
pyloric orifice and the ileocecal valve
what are the 3 segment of the small intestine?
duodenum(1 foot), jejunum (8 feet), and ileum (12 feet)
with pH of 6.0-7.4
how long is the large intestine?
5 feet
what is the large intestine consist of?
cecum
appendix
colon
rectum
anal canal
how many parts is the colon divided into
ascending colon
transverse colon
descending colon
what is the end of the colon called?
sigmoid colon
what connects the sigmoid colon and the pelvic floor
rectum
with a pH of 6.7
where does the ileal content empty into?
the cecum (beginning of large intestine
what does the large intestine absorb?
water and electrolytes
what are the accessory organs of the GI tract?
salivary gland
liver
gall bladder
pancreas
what is the largest organ in the body?
the liver which weighs 3.5 pounds and found under diaphragm
divided into right and left lobe
what is the function of the liver?
- bile production and secretion
- production of clotting factors and fibrinogen
- synthesis of most plasma proteins (albumin and globulin)
- detoxification of a variety of substances, including drugs and alcohol
what is the function of the gall bladder?
store biles produced by the liver (found inferior of liver)
the cystic duct combine with the hepatic duct form the common bile duct and drains into duodenum
bile gives stool brown color
what is the function of the pancreas
endocrine secretion- release insulin, glucagon, somatostatin, and gastrin for carb metabolism
exocrine secretion- bicarbonate and pancreatic enzyme that flow to duodenum.
what does lipase do?
break down fat
what does amylase do?
break down carbohydrate
what does protease do?
break down protein
what is the function of the spleen?
removal of old or agglutinated erythrocytes and platelets
activation of B and T lymphocytes
what is the spleen made up of ?
white pulp - lymphatic nodules and diffuse lymphatic tissue
red pulp -venous sinusoids
what does the urinary tract include?
kidneys
ureters
urinary bladder
urethra
where are the kidneys located
posterior abdominal wall on either side of the body
what is the function of the kidneys?
secretion of erythropoietin to stimulate red blood cell production and production of a biologically active form of vitamin D
nephrons regulate fluids and electrolyte balance through microscopic filter and pressure system to eventually produce urine.
what does antacid do?
neutralize acidity (hydrochloric acid)
lower pepsin activity
raise the gastric pH which inactivates pepsin
what are the 4 types of antacid?
non systemic antacid:
aluminum compound
magnesium compound
systemic antacid:
calcium compound
sodium compound
what does accessive amount of sodium bicarbinate do?
cause metabolic alkalosis
what does excessive calcium carbonate do?
cause hypercalcemia
what does aluminum hydroxide do?
cause constipation
what does magnesium hydroxide do?
cause diarrhea
what is aluminum hydroxide’s absorption?
minimal absorption through intestine
in feces binds to phosphate; small amount in urine
where is calcium bicarbonate absorbed?
occurs mostly in duodenum and depends on calcitriol and vitamin D. Food increases absorption by 10-30%.
what does pepsin do?
cause mucosal damage.