MCEM Toxicology MCQ

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MCEM Toxicology MCQ

Transcript of MCEM Toxicology MCQ

MCEM Toxicology MCQ1. Features of opiate withdrawal include: (a) Yawning. (b) Dilated pupils. (c) Auditory hallucinations. (d) Visual hallucinations. (e) Vomiting. Opiate withdrawal is associated with increased blood pressure, heart rate, lacrimation, rhinorhea, yawning, goosebumps, insomnia, aches and pains. 2. Hypercapnia may be caused by: (a) Hyperventilation. Hypoventilation causes hypercapnia. (b) Brainstem lesions. Depressed central respiratory drive. (c) Tetanus. Endogenous toxins such as tetanus can cause hypercapnia. (d) Botulism. Botulism is a neuromuscular toxin which causes neuromuscular impairment. (e) Organophosphate poisoning. Organophosphates are neuromuscular toxins which cause neuromuscular impairment. 3. Emergency complications of malignancy: (a) PR examination is relatively contraindicated in neutropaenic patients. PR examination is relatively contraindicated in neutropaenic patients.PR should be withheld until anti-biotics are administered because of the risk of infection. (b) The untreated mortality of neutropaenic ( 15min before the head injury is an indication for CT Brain Scan. False ?Amnesia for events >30min before the head injury is an indication for CT Brain Scan. (e) An acute rise in intracranial pressure may manifest as a central respiratory depression. True ?An acute rise in intracranial pressure may manifest as a central respiratory depression. Cushings response occurs with bradycardia and hypertension

MCEM Toxicology MCQAbdominal structures corresponding to vertebral levels:

(a) The renal arteries originate at the vetebral level of L1/2. True ?The renal arteries originate at the vetebral level of L1/2. (b) The spinal cord ends in adults at the level of L1/2. True ?The spinal cord ends in adults at the level of L1/2. (c) The azygous and hemiazygous veins are formed at L4 vertebral level. False ?The azygous and hemiazygous veins are formed at L2 vertebral level (d) The ligament of treitz is at the level of the upper border of the L4 vertebra. False ?The ligament of treitz is at the level of the upper border of the L2 vertebra . (e) The umbilicus is at the vertebral level of L3/4. True ?The umbilicus is at the vertebral level of L3/4.

MCEM Toxicology MCQGunshot Wounds:

(a) Temporary cavitation is caused by a sonic shock wave in high velocity injuries. False ? (b) Solid organs such as liver resist cavitation more than softer tissues such as lung False ? (c) High velocity injuries usually have less bacterial contamination False ? (d) Abdominal gunshot wounds invariably require laparotomy. True ? (e) Cranial gunshot wounds invariably require ventilation. True ?

MCEM Toxicology MCQWith regard to innervation of the ear

(a) The anterior half of the ear is supplied by the auriculotemporal nerve which is a branch of the mandibular portion of the trigeminal nerve. True (b) The posterior half of the ear is supplied by branch of the trigeminal nerve. False (c) The posterior part of the ear is supplied by 2 nerve branches derived from the cervical plexus. True (d) The vagus nerve has no role in the inervation of the ear. False (e) The vagus nerve supplies the external auditory canal. True

The anterior half of the ear is supplied by the auriculotemporal nerve which is a branch of the mandibular portion of the trigeminal nerve.The posterior part of the ear is supplied by 2 nerve branches derived from the cervical plexus.The vagus nerve supplies the external auditory canal.The position for an ear block is where the ear lobe attaches to the head.

MCEM Toxicology MCQElbow Dislocation

(a) On lateral X Ray the radius and the ulna are most commonly displaced posteriorly. True ?On lateral X Ray the radius and the ulna are most commonly displaced posteriorly. (b) The most frequent neurological injury is to the median nerve. False ?The most frequent neurological injury is to the ulnar nerve. (c) On clinical exam the olecranon process is commonly not prominent. False ?On clinical exam the olecranon process is commonly prominent. (d) On clinical exam the elbow is commonly flexed at 90 degrees. False ?On clinical exam the elbow is commonly flexed at 45 degrees and the olecranon is prominent. (e) Vascular complications occur in about 10% of elbow dislocations. True ?The most common artery involved is the brachial artery.

MCEM Toxicology MCQStructure Function and Mechanics of the Vertebral Column:

(a) Flexion and extension of the vertebral column is extensive in the cervical and thoracic regions but limited by the lumbar region. False ?Flexion and extension of the vertebral column is extensive in the cervical and lumbar regions but limited by the thoracic region because of the rib cage. (b) The cervical vertebrae normally have a posterior convexity while the thoracic region has a posterior concavity. False ?The cervical vertebrae normally have a posterior concavity while the thoracic region has a posterior convexity. (c) There is normally 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, and 5 sacral vertebrae, and 4 coccygeal vertebrae. True ?There is normally 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, and 5 sacral vertebrae, and 4 coccygeal vertebrae. (d) Rotation ( twisting movement ) of the body is least extensive in the cervical region. False ?Rotation of the body is least extensive in the lumbar region. (e) Lateral flexion of the body is restricted by the cervical section of the vertebral column False ?Lateral flexion of the body is restricted by the thoracic section of the vertebral column

MCEM Toxicology MCQMaxillofacial radiographs

(a) Orthopantomogram view can be used to assess the frontal bones False ?OPG is used to assess the mandible (b) Submentovertical projection is used to assess the zygomatic arch True ? (c) Occiptomental views are used to assess the maxilla True ?Occiptomental views are used to assess the maxilla, orbital floors and zygomatic arches (d) Occipitomental views are used to assess the orbital floors True ?Occiptomental views are used to assess the maxilla, orbital floors and zygomatic arches (e) Occipitomental views are used to assess the zygomatic arches True ?Occiptomental views are used to assess the maxilla, orbital floors and zygomatic arches

MCEM Toxicology MCQSurface Anatomy:

(a) The pharynx becomes the oesophagus at C6 True ?The pharynx becomes the oesophagus at C6 (b) C7 is the first clearly palpable spinous process. True ?C7 is the first clearly palpable spinous process. (c) The superior border of the scapula is at T3 False ?The superior border of the scapula is at T2 (d) The suprasternal notch is at the level of T2/3 True ?The suprasternal notch is at the level of T2/3 (e) The end of the oblique fissure of the lung is at the spine of T3 True ?The end of the oblique fissure of the lung is at the spine of T3

MCEM Toxicology MCQSurface Anatomy of the Anterior Forearm:

(a) The brachial artery divides into the radial and ulnar arteries just below the line of the elbow joint. True ?The brachial artery divides into the radial and ulnar arteries just below the line of the elbow joint. (b) The radial artery lies in a groove between the flexor carpi radialis and the anterior border of the radius. True ?The radial artery lies in a groove between the flexor carpi radialis and the anterior border of the radius. The radial artery lies in a groove between the flexor carpi radialis and the anterior border of the radius. (c) The radial artery can be palpated on the lateral side of the trapezium in the anatomical snuff box. False ?The radial artery can be palpated on the lateral side of the scaphoid in the anatomical snuff box. (d) In the area of the wrist and hand the ulnar artery is covered by the palmer aponeurosis. True ?In the area of the wrist and hand the ulnar artery is covered by the palmer aponeurosis. (e) The pulsations of the ulnar artery are recognised lateral to the pisiform bone. True ?The pulsations of the ulnar artery are recognised lateral to the pisiform bone

MCEM Toxicology MCQRadial Head Fractures

(a) Radial head fractures are the most common fractures of the elbow True ?Radial head fractures are the most common fractures of the elbow (b) The radial head articulates with the trochlea False ?The radial head articulates with the capitellum. (c) The radial head serves as a stabiliser against forces away from the midline. True ?The radial head serves as a stabiliser against valgus stress. (d) Radial head fractures are usually the result of a fall on an outstretched hand causing the radial head to be driven into the trochlea. False ?Radial head fractures are usually the result of a fall on an outstretched hand causing the radial head to be driven into the capitellum. (e) Are associated with medial epicondyle avulsion fractures. True ?This is secondary to valgus stress.

MCEM Toxicology MCQAnatomical Considerations of the thoracic vertebrae:

(a) The start of the arch of the aorta is at T4/T5 True ?The start of the arch of the aorta is at T4/T5 (b) The sternum runs from T5 to T8 True ?The sternum runs from T5 to T8 (c) The upper border of the liver is usually at T9 False ?The upper border of the liver is usually at T6 (d) The inferior angle of the scapula is at T3 False ?The inferior angle of the scapula is at T7 (e) The IVC goes through the diaphragm at T8 True ?The IVC goes through the diaphragm at T8 ( along with the right phrenic nerve )

MCEM Toxicology MCQthe ulnar nerve is interrupted at the wrist the following muscles are not innervated.

(a) Palmaris brevis . True ?Palmaris brevis is innervated by the superficial terminal branch of the ulnar nerve in the hand. (b) Opponens pollicis False ?Opponens pollicis is innervated by the median nerve. (c) Flexor pollicis brevis False ?Flexor pollicis brevis is innervated by the median nerve. (d) Abduct