Q9. Which of the following structures do not form the external part of anal canal mechanism?
a) Levator Ani
b) Internal Sphincter
c) Pubo rectalis
d) External Sphincter
Q10. Which of the following is the most common symptom of rectal cancer?
a) Pain
b) Mucus discharge
c)Haematochezia
d) Tenesmus
Q11. All of the following preserve rectal continence except?
a) Sensory innervation
b) Motor function
c) retrograde rectal contractions
d) Reservoir and capacity of rectum
Q12. The most mobile part of large bowel is
a) caecum
b) Transverse colon
c) Descendinng colon
d) Sigmoid colon
Q 13. In Crohn's disease which of the following extracolonic manifestations disappear after bowel resection
a) Cirrhosis
b) Primary sclerosing cholangitis
c) peripheral arthritis
d) Ankylosing spondylitis
Answers
9. b
The anal canal mechanism consists of two tubes
The inner one composed of internal sphincter muscle and the outer part constituting the pelvic floor,
comprising of
Puborectalis
Levator Ani
External Sphincter
10. c
Haematochezia (Blood in stools ) is the most common symptom but often the bleeding is ascribed to hemorrhoids and there is a delay in seeking treatment.
Sabiston text book 18th edition page 1412
11. c
Emptying of rectal contents is dependent on motor and sensory functions of the anal canal, the compliance, tone and evacuability of rectum.
Incontinence can be due to
.Functional problems
.Sphincter Weakness
.Sensory loss
Retrograde peristalsis occurs in rectum and has no relation with incontinence
12. d
Sigmoid colon
Sabiston text book 17th edition 1403.
13. c
MOst of the extracolonic manifestations of Crohn's disease improve after bowel resection except
PSC (Primary Sclerosing Cholangitis)
Ankylosing spondylitis
Cirrhosis
Sabiston 17th edition page 1439
