MRCS Recalls Mock 2 P1 4-19

Question 1

post parotidectomy patient developed gustatory sweating during meals,what is the mechanism?

Answer 1

Frey syndrome

Question 2

young man presented after RTA with complete transection of spinal cord but still have bladder control due to

Answer 2

intact pelvic splanchnic nerves

Question 3

Regarding mysethenia gravis ,receptors to be affected related to?

Answer 3

Acetylcholine

Question 4

A 26-year-old man presents to the Emergency Department with extensive bleeding from his arm after sustaining a glass injury. On examination there is a 7 cm transverse laceration across the anterior aspect of his elbow. On exploring the cubital fossa you would expect the brachial artery to be

Answer 4

lateral to the median nerve

Question 5

what is the first branch of internal carotid artery

Answer 5

1st branch of internal carotid = Ophthalmic a.
1st branch of external carotid = superior thyroid a.

Question 6

A 22-year-old man has been stabbed in the left fifth intercostal space at the edge of the sternum. Which structure is most likely to have been penetrated?

Answer 6

Right ventricle

Question 7

.which of the following organs has a lymphatic drainage to para-aortic LN

Answer 7

ovary

Question 8

dermatome of the little finger

Answer 8

C8

Question 9

which of the following is requir to be divided during tracheostomy

Answer 9

thyroid isthmus

Question 10

Failure of caudal part of metanephron to develop will result in

Answer 10

renal agenesis

Question 11

Pericardioperitoneal membrane defect will lead to

Answer 11

Congenital Diaphragmatic hernia

Question 12

70-year-old man undergoes transurethral resection of bladder tumour (TURBT). The tumour lies over the lateral side wall of the bladder just above the opening of the right ureteric orifice. Use of the diathermy suddenly causes the patient to ‘kick’ because of contraction of the hip adductors muscles. Which nerve has been stimulated

Answer 12

Obturator nerve

Question 13

A 28-year-old man presents with pain in his left scrotum. A diagnosis of varicocele is made. Which vessel is involved

Answer 13

gonadal vein

Question 14

calculating CPP

Answer 14

CPP=MAP-ICP & (MAP = SBP +2DBP /3 )

Question 15

the most common site of obstruction in hydrocephalus?

Answer 15

cerebral aqueduct of sylvius

Question 16

A healthy 36 years old man is being assessed with a view to being a life related kidneydonor which are of following investigations is most accurate for measuring the GFR?

Answer 16

Inulin

Question 17

relatioN of ureter to the gonadal vessels at pelvic brim?

Answer 17

posterior to it

Question 18

Activation of which of the following transport systems best describes how aldosterone leads to maintenance of the intravascular volume and oliguria

Answer 18

Na/K in the collecting ducts

Question 19

42 years old woman has a cholecystectomy and develops a self-limiting postoperative wound infection. By what process would bacterial ingestion have been enhanced?

Answer 19

Opsonisation

Question 20

Patient cant dorsiflex his big toe, Which nerve root is most likely to be involved?

Answer 20

L5

Question 21

A 19-year-old woman presents to the Emergency Department profoundly hypovolemic having fallen from a horse. A postero-anterior (PA) chest radiograph shows a fracture to the medial third of the left clavicle. Which of the following vessels is most likely to be damaged?

Answer 21

Left subclavian artery

Question 22

The branchial cyst derived from which paryngeal arch?

Answer 22

Second

Question 23

.A 26-year-old man is admitted to the Emergency Department with multiple peripheralfractures. He is clinically shocked. Which is the structure responsible for the firsthemostatic response to a fall in systemic arterial blood pressure?

Answer 23

Baroreceptor

Question 24

During recovery from varicose veins surgery, 35 years old woman complains of weakness of dorsiflexion of the ankle ,Physical examination reveals absent sensation over the dorsum of the foot. Which of the following nerves is most likely injured?

Answer 24

Common peroneal nerve

Question 25

pt with pancreatitis, what is the enzyme responsible for autodigestion

Answer 25

trypsin

Question 26

patient fall at his wrist resulted in median nerve injury?

Answer 26

Due to lunate dislocation

Question 27

Hypospadias is a congenital anomaly of the penile urethra. The underlying cause is mal-development of which of the following structures

Answer 27

Urogenital Fold

Question 28

The surface landmarks used to localize the optimal site for a tracheostomy incision are midway between the suprasternal notch and which of the following??

Answer 28

Cricoid

Question 29

The right and left pulmonary arteries are derived from which of the following embryological aortic arches?

Answer 29

Sixth aortic arch

Question 30

70-year-old woman from a nursing home is brought to the Emergency Department with abdominal pain and vomiting. On examination, she is dehydrated and her abdomen is distended. There is a 3 cm x 4 cm swelling in the right groin which is non tender, and there is no cough impulse. At operation, a femoral hernia is found. Which one of the following lies immediately lateral to the hernial neck?

Answer 30

Femoral vein

Question 31

the relation of ulnar nerve to the ulnar artery in wrist?

Answer 31

ulnar nerve is ulnar to ulnar artery

Question 32

Patient with anterior compartment syndrome, where will be the site of loss of sensation?

Answer 32

1st web space

Question 33

Counter current multiplier mechanism that leads to the concentration of urine in the Loop of Henle?

Answer 33

Permeability to solute in thick ascending limb

OR

Impermeability to water in thick ascending limb

Question 34

4 features of tetralogy of fallot

Answer 34

1. Pulmonary Stenosis
2. VSD(R. to L. shunt)
3. RVH
4. Overriding aorta

Question 35

A 45-year-old man has established cirrhosis. At a follow-up appointment a palpable spleen four fingers breadths below the costal margin is noticed. Full blood counts have shown a persistent thrombocytopaenia. Bone marrow examination shows megakaryocyte hyperplasia. What is the most likely cause of the thrombocytopaenia

Answer 35

Platelet destruction in the spleen