Urinary bladder

Question 1

2 roles of bladder?

Answer 1

temporary storage of urine, expulsion or urine

Question 2

how much urine can be held?

Answer 2

400-600 ml

Question 3

what is the apex?

Answer 3

connected to umbilicus by the median umbilical ligament

Question 4

what is the median umbilical ligament a remnant of?

Answer 4

urachus

Question 5

what is the trigone?

Answer 5

triangular area within fundus which marks the left and right ureteric meatus and urethra

Question 6

detrusor - type of muscle?

Answer 6

smooth muscle

Question 7

role of internal urethral sphincter in males?

Answer 7

prevents seminal regurgitation during ejaculation

Question 8

type of muscle - ext. urethral sphincter?

Answer 8

skeletal

Question 9

is ext. urethral sphincter under voluntary or involuntary control?

Answer 9

voluntary

Question 10

is int. urethral sphincter under voluntary or involuntary control?

Answer 10

involuntary

Question 11

blood supply to urinary bladder?

Answer 11

superior vesical branch of int. iliac a.

Question 12

how is the blood supply supplemented in males?

Answer 12

superior vesical branch of int. iliac a. is supplemented by the inferior vesical a.

Question 13

how is the blood supply supplemented in females?

Answer 13

superior vesical branch of int. iliac a. is supplemented by the vaginal arteries

Question 14

venous drainage?

Answer 14

vesical venous plexus (empties into int. iliac veins)

Question 15

where does the superolateral aspects of the bladder drain into (lymph)?

Answer 15

external iliac nodes

Question 16

where does the neck and fundus of the bladder drain into (lymph)?

Answer 16

internal iliac, sacral and common iliac nodes

Question 17

sympathetic control of bladder?

Answer 17

hypogastric n. (T12-L2)

Question 18

result of sympathetic control?

Answer 18

relax detrusor - urine retention

Question 19

parasympathetic control of bladder?

Answer 19

pelvic nerve (S2-4)

Question 20

result of parasympathetic control?

Answer 20

contraction of detrusor - micturition

Question 21

somatic control of bladder?

Answer 21

pudendal nerve (S2-4)

Question 22

result of somatic control?

Answer 22

innervates ext. urethral sphincter - voluntary control over micturition

Question 23

role of afferent nerves in bladder?

Answer 23

found in bladder wall - sends signal to brain when need to urinate