Bladder Wk11

Question 1

External urtherral sphinter is under what control?

Answer 1

Somatic innervation that maintains continence

Question 2

Bladder extends from the

Answer 2

renal pelvis via ureteropelvic junction

Question 3

What are the ligaments for the bladder?

Answer 3

Base anchored by several ligaments: pubovesicle (female) & puboprostatic (male)

Question 4

Describe the muscles in the bladder

Answer 4

Walls consist of a smooth muscle – the detrusor muscle (ANS control)
* trigone on posterior wall formed by ureters and urethral opening

Question 5

What is the blood supply of the bladder?

Answer 5

Internal iliac artery
Superior and inferior vesical a.

Question 6

What is the venous drainage of the bladder?

Answer 6

Vesical venous plexus
Internal iliac vein

Question 7

What is the parasympathetic innervation for the bladder?

Answer 7

Pelvic splanchnic n
Vesical plexus

Question 8

What is the sympathetic innervation?

Answer 8

Superior hypogastric plexus
Inferior hypogastric plexus

Question 9

Urethra in males include

Answer 9

• Preprostatic
• Prostatic
• Membranous
• Spongy

Question 10

What is in control of our external urethral sphincter?

Answer 10

Somatic nervous system

Question 11

Describe parasympathetic innerv. of the bladder.

Answer 11

Parasympathetic preganglionic neurons (S2-S4) cause contraction

Question 12

What happens after parasympathetic innerv. of bladder?

Answer 12

There are mechanoreceptors that activate the signal via visceral afferents to SC

Question 13

Sympathetic innervation:

Answer 13

• Originates from T10-L2 close internal sphicter and
• inhibit bladder contraction

Question 14

When the bladder is stretched, what occurs?

Answer 14

Mechanoreceptors are activated (send afferent to brain & increase in parasymp tone) AND decrease in symp (inhibiting int sphinter)

Question 15

Somatic innervation in the bladder originates in and is what control?

Answer 15

• originates S2-S4
• voluntary control of external
  sphincter

Question 16

Micturition is the process

Answer 16

of emptying the bladder

Question 17

Continence is the ability to

Answer 17

hold urine with a full bladder

Question 18

Atonic Bladder and incontinence

Answer 18

Destruction of sensory
nerve fibres - overflow in incontinence

Question 19

Automatic Bladder

Answer 19

Spinal cord injury above sacral SC
Micturition reflex intact – no descending control for urine - leaking

Question 20

Uninhibited Neurogenic Bladder

Answer 20

Frequent and relatively
uncontrolled micturition – damage to SC or brainstem that
interrupts inhibitory signals

Question 21

When someone has had a ACA stroke, you might have

Answer 21

Contralateral hemiparesis
Urinary incontinence

Question 22

Name the muscle of the bladder

Answer 22

Detrusor