Elimination Flashcards
What are the 2 important functions of the bladder?
1) . Storage of urine.
2) . Eliminating urine.
What is micturition?
Release of urine from bladder into the urethra so it can be eliminated (via urethra meatus).
How does urine travel down to the bladder from the kidneys?
Via peristalsis.
What is the urinary bladder called?
The detruser muscle.
Why is the bladder called the detruser muscle?
Because the bladder wall is made up of layers of smooth muscle; collectively called the detruser muscle.
What are the different layers of the bladder wall?
1) . Transitional epithelium (lining layer).
2) . Lamina propria (middel layer).
3) . Submucosa.
What is the structure of the urinary bladder?
- Ureter.
- Peritoneum.
- Detruser muscle.
- Submucosa.
- Mucosa.
- Uretheral opening.
- Trigone.
- Internal/external sphincter.
- Prostate gland.
What do the sensory nerve endings in the bladder respond to?
Stretching.
Where in the bladder is there a lot of sensory nerve endings?
Trigone.
What are the types of muscles in the sphincters?
- Internal = smooth (circular).
- External = striated (skeletal).
Which nervous system controls each sphincter?
- Internal = autonomic (involuntary).
- External = somatic (voluntary).
How is the male and female sphincters different?
1) . Male =
- separated by prostate.
- internal = sits at base of bladder neck.
2) . Female =
- adjacent to one another.
Where are the micturition centres?
- Spinal cord.
- Pons.
- Cerebral cortex.
What is the pons micturition centre?
Pontine Micturition Centre (PMC).
What is the function of the spinal cord micturition centre?
Sacral Micturition Centre (SCC) =
- integrates incoming sensory info from bladder and outgoing motor impulses to the bladder.
