Lab: The Urinary System Flashcards
Shade of urine
Appearance
Clear vs. cloudy urine
Turbidity
pH of urine
4.5-8.2
Production of urine
1-1.3 ml/min
1-2 L per 24 hours
Normal components of urine
Water
Ions
Urea
Uric acid
Ammonia
Creatinine
Abnormal components of urine (-uria)
Glucose
Large proteins
RBCs + WBCs
Bacteria
Ketone bodies
Casts
Functions of the urinary system
- Excretion
- Regulation
- Productions of hormones
What substances does urine excrete?
- Metabolic wastes
- Exogenous substances (drugs)
What does the urinary system regulate in regard to blood homeostasis?
- BP
- Blood volume
- Blood pH
- Blood composition
Which hormones does the urinary system create?
Renin
Erythropoietin
Organs of the urinary system
2 Kidneys
2 Ureters
Bladder
Urethra
Muscular tube that extend to the urinary bladder
Ureters
Opening where the ureters connect to the bladder
Ureteral openings/orifices
How is urine propelled?
- Peristalsis
- Hydrostatic pressure
- Gravity
Triangular area marked by two ureteral openings and the urethral opening
Trigone
Muscularis of bladder
Detrusor
Wrinkles that allow the bladder to stretch and fill
Rugae
A tube that conveys urine out of the body
The urethra
How long is the female urethra?
3-4 cm
How long is the male urethra?
18 cm
Which urinary sphincter is involuntary?
Internal urethral sphincter
Which urinary sphincter is voluntary?
External urethral sphincter
3 regions of the male urethra
- Prostatic urethra
- Membranous urethra
- Spongy (penile) urethra
How do the ureters propel urine?
- Gravity
- Hydrostatic pressure
- Peristalsis
An infection of the urinary system - urethritis, pyelonephritis, and cystitis
Urinary tract infection
Causes of a UTI
Bacterial infection in the urethra, kidney, or bladder
Symptoms of a UTI
- Constant urge to urinate
- Burning when urinating
- Cloudy urine
- Pelvic pain
UTI treatments
- Fluids
- No soda or coffee
- Change how you wipe
- Pee after sex
- Low dosage antibiotics
Connective tissue layer that encloses the kidney and maintains its shape
Fibrous renal capsule
Purpose of fibrous renal capsule
Barrier from trauma and infection
Adipose layer holding kidneys in place
Perirenal fat capsule
Purpose of perirenal fat capsule
Protection against trauma and cushion
Anchors kidney to surrounding structures and binds to abdominal wall
Renal fascia
Function unit of the kidney
Nephron
Glomerular capsule + glomerulus
Renal corpuscle
Renal corpuscle + renal tubes
Nephron
Ball of capillaries
Glomerulus
Parietal layer made of simple squamous epithelium
Glomerular capsule
Epithelia of the glomerulus
simple squamous
Epithelia of the proximal convoluted tubule
Simple cuboidal with microvilli
Epithelia of the thick segments of the nephron loop
Simple cuboidal
Epithelia of the thin segments of the nephron loop
Simple squamous
Epithelia of the distal convoluted tubule, collecting duct, and papillary duct
Simple cuboidal
What type of capillaries does the cortical nephron have?
Cortical
What type of capillaries does the juxtamedullary nephron have?
Vasa recta
Water movement from area of low solute concentration to area of high solute concentration
Osmosis
Number of particles of solute per liter of solution
Osmolarity
Is water uptake/reabsorption active of passive?
Passive