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NEW QUESTION 93
You are treating a patient with a dysrhythmia You are teaching your students about the phases of the cardiac action potential and emphasize the absolute refractory period as a means of preventing another action potential being generated Which factor is most important for this period?
- A. Potassium channel activation
- B. Sodium channel inactivation
- C. Potassium channel mactivation
- D. Sodium channel activation
- E. Calcium channel activation
Answer: B
NEW QUESTION 94
An 83 year old woman presents with acute dyspnoea and is diagnosed with cardiac failure She has a history of dysphagia and CT confirms oesophageal cancer.
Compression of which chamber of the heart is most likely to have caused her cardiac failure? A Both ventricles
- A. Right atrium
- B. Left ventricle
- C. Right ventricle
- D. Left atrium
Answer: B
NEW QUESTION 95
A patient presents with unilateral tongue swelling with no additional signs of allergic reaction She is on multiple cardiac medications Which drug is most likely to have caused these symptoms?
- A. Atenolol
- B. Simvastatin
- C. Aspirin
- D. Lisinopril
- E. Bendroflumethiazide
Answer: D
NEW QUESTION 96
You are leaching medical students cardiovascular examination and the link between heart sounds and the cardiac cycle. Which phase best correlates with the start of the first heart sound?
- A. Ventricular ejection
- B. Isovolumetric relaxation
- C. Atrial systole
- D. Isovolumetric contraction
- E. Ventricular filling
Answer: D
NEW QUESTION 97
A 23 year old woman presents with facial swelling She has hereditary angioedema due to complement deficiency Which organism is it most important for this patient to be vaccinated agains?
- A. Herpes zoster
- B. Influenza
- C. Parainfluenza
- D. Neisseria meningitidis
- E. Clostridium tetani
Answer: D
NEW QUESTION 98
A 65 year old patient presents to the ED with a three hour history of expressive dysphasia. You suspect a stroke and order a CT scan Which area of the brain is the most likely site of the infarct?
- A. Parietal
- B. Frontal
- C. Cerebellum
- D. Occipital
- E. Temporal
Answer: B
NEW QUESTION 99
You are discussing physiology of the body compartments and distribution of body water while teaching nurse practitioners.
Which extracellular fluid compartment is most likely to contain the most water?
- A. Bone
- B. Dense connective tissue
- C. Plasma
- D. Interstitial fluid
- E. Transcellular
Answer: D
NEW QUESTION 100
You are administering intravenous normal saline to a patient in the resus room.
What change in volume occurs within the body's fluid compartments whilst giving this treatment?
- A. Increased intracellular
- B. Reduced intracellular
- C. Increased extracellular
- D. Increased interstitial
- E. Reduced extracellular
Answer: C
NEW QUESTION 101
A 28 year old woman with a dislocated left shoulder has altered sensation along the radial aspect of her left forearm and loss of flexion at the elbow and wrist Injury at which location of the brachial plexus best explains her neurological symptoms?
- A. Lateral cord
- B. Upper trunk
- C. Lower trunk
- D. Posterior cord
- E. Medial cord
Answer: A
NEW QUESTION 102
An 80 year old man presents to the ED with clinical features suggestive of ischaemic bowel Which artery is most commonly occluded in this condition?
- A. Coeliac
- B. Left colic
- C. Gastroduodenal
- D. Superior mesenteric
- E. Inferior mesenteric
Answer: D
NEW QUESTION 103
A patient presenting with acute onset neurological symptoms has a CT scan of their brain that shows an acute pontine haemorrhage What is the most likely clinical finding?
- A. Reduced conscious level
- B. Hemianopia
- C. Speech disturbance
- D. Unilateral sensory disturbance
- E. Unilateral motor disturbance
Answer: A
NEW QUESTION 104
A three week old baby is brought in by her concerned parents She is vomiting substantially after feeds and is failing to gain weight. Investigation reveals an alkalosis and a low serum potassium.
The alkalosis is most likely to be due to which mechanism?
- A. Loss of hydrochloric acid
- B. Hypoventilation causing reduced pC02
- C. Exchange of H* at the gastric protein pump
- D. Increased loss of magnesium
- E. Increased production of bicarbonate
Answer: A
NEW QUESTION 105
A therapeutic trial demonstrates that everyone who received the drug has improved while no one improved with placebo What best describes the expected number needed to treat?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: E
NEW QUESTION 106
A 34 year old woman with Graves' disease presents with fever, palpitations, tremor and anxiety Which hormone is most likely to be causing her symptoms?
- A. Thyroxine (T4)
- B. Thyroid receptor hormone
- C. Triiodothyronine (T3)
- D. Adrenaline
- E. Thyroid stimulating hormone
Answer: E
NEW QUESTION 107
A 26 year old man sustains a stab wound to the anterior aspect of the left side of his neck The wound involves the thoracic inlet Which structure is most likely to be encountered and injured first?
- A. Subclavian artery
- B. Pleura
- C. Oesophagus
- D. Thoracic duct
- E. Subclavian vein
Answer: B
NEW QUESTION 108
A clinical trial suggests that a new dressing for burns works better on men than women, but there is in fact no difference Which term best describes this situation?
- A. Type 2 error
- B. False negative
- C. False positive
- D. Type 1 error
- E. Alternative hypothesis
Answer: A
NEW QUESTION 109
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