Oliver's Quizzes Flashcards
A 32 year old female presents to the GP complaining of blurry vision. When assessing her eye movements, you notice that she struggles to adduct her left eye and gets a few beats of nystagmus in that eye when she looks right. She is able to look left with no difficulty. Where is the lesion?
- a. Medial longitudinal fasciculus
- b. Oculomotor nucleus
- c. Abducens nucleus
- d. Paramedical pontine reticular formation
A 32 year old female presents to the GP complaining of blurry vision. When assessing her eye movements, you notice that she struggles to adduct her left eye and gets a few beats of nystagmus in that eye when she looks right. She is able to look left with no difficulty. Where is the lesion?
- a. Medial longitudinal fasciculus
- b. Oculomotor nucleus
- c. Abducens nucleus
- d. Paramedical pontine reticular formation
People who lived in the UK for 6 months between January 1st 1980 - December 31st 1996 cannot give blood in Australia because of which disease?
- a. Variant Creutzfeldt Jakob Disease
- b. Kuru
- c. Gerstmann-Straussler-Scheinker Syndrome
- d. Fatal Familial Insomnia
People who lived in the UK for 6 months between January 1st 1980 - December 31st 1996 cannot give blood in Australia because of which disease?
- a. Variant Creutzfeldt Jakob Disease
- b. Kuru
- c. Gerstmann-Straussler-Scheinker Syndrome
- d. Fatal Familial Insomnia
The lentiform nucleus consists of:
- a. Caudate nucleus and putamen
- b. Caudate nucleus and globus pallidus
- c. Putamen and subthalamic nucleus
- d. Putamen and globus pallidus
The lentiform nucleus consists of:
- a. Caudate nucleus and putamen
- b. Caudate nucleus and globus pallidus
- c. Putamen and subthalamic nucleus
- d. Putamen and globus pallidus
How does dopamine affect the direct pathway?
- a. D2 receptors in the globus pallidus internus to decrease movement
- b. D1 receptors in the striatum to increase movement
- c. D1 receptors in the globus pallidus internus to increase movement
- d. D2 receptors in the striatum to increase movement
How does dopamine affect the direct pathway?
- a. D2 receptors in the globus pallidus internus to decrease movement
- b. D1 receptors in the striatum to increase movement
- c. D1 receptors in the globus pallidus internus to increase movement
- d. D2 receptors in the striatum to increase movement
Which of the following statements is correct?
- a. Rigidity is velocity dependent and characteristic of pyramidal lesions
- b. Spasticity is velocity dependent and characteristic of extrapyramidal lesions
- c. Rigidity is velocity independent and characteristic of extrapyramidal lesions
- d. Spasticity is velocity independent and characteristic of pyramidal lesions
Which of the following statements is correct?
- a. Rigidity is velocity dependent and characteristic of pyramidal lesions
- b. Spasticity is velocity dependent and characteristic of extrapyramidal lesions
- c. Rigidity is velocity independent and characteristic of extrapyramidal lesions
- d. Spasticity is velocity independent and characteristic of pyramidal lesions
Briefly outline the pathogenesis of prion diseases. (2.5 marks)
What clinical features suggest a patient has a cerebellar lesion? (4 marks)
(8)
- Scanning speech/ataxic speech
- Nystagmus
- Dysmetria
- Dysdiadochokinesia
- Rebound phenomenon
- Abnormal heel-to-shin test coordination
- Hypotonia
- Wide based and/or staggering gait
What are the clinical features of Parkinson’s disease? (4 marks)
There are 4 main subtypes of motor neuron disease, list them and the neurons involved in each. (4 marks)
A 60 year old male with a history of visual hallucinations, depression and cognitive decline is killed in a motor vehicle accident. At autopsy, tissue samples from his brain are stained and viewed by a neuropathologist. The following inclusion body was identified in a sample from the patient’s cortex. What is this inclusion body called and what protein(s) is it composed of? What disease did this patient have? (1.5 marks)
Which of the following organisms is not a common cause of atypical pneumonia?
- a. Chlamydophila pneumoniae
- b. Legionella pneumophila
- c. Mycoplasma pneumoniae
- d. Moraxella catarrhalis
Which of the following organisms is not a common cause of atypical pneumonia?
- a. Chlamydophila pneumoniae
- b. Legionella pneumophila
- c. Mycoplasma pneumoniae
- d. Moraxella catarrhalis
Where are peyer’s patches located?
- a. Duodenum
- b. Jejunum
- c. Ileum
- d. Colon
Where are peyer’s patches located?
- a. Duodenum
- b. Jejunum
- c. Ileum
- d. Colon
Which of the following bacteria are able to replicate inside phagocytes?
- a. Streptococcus pneumoniae
- b. Legionella pneumophila
- c. Parainfluenza
- d. Haemophilus influenzae
Which of the following bacteria are able to replicate inside phagocytes?
- a. Streptococcus pneumoniae
- b. Legionella pneumophila
- c. Parainfluenza
- d. Haemophilus influenzae
Which of the following is an example of a macrolide?
- a. Azithromycin
- b. Indomethacin
- c. Cephalexin
- d. Ciprofloxacin
Which of the following is an example of a macrolide?
- a. Azithromycin
- b. Indomethacin
- c. Cephalexin
- d. Ciprofloxacin
= b. Lingula
Claire is a 6 year old girl who presents to the emergency department with her mother with shortness of breath after she inhaled a small piece of a toy. A chest x-ray shows that one of her bronchi is obstructed with a foreign body. Which bronchus is most likely to be obstructed and why? (1 mark)
The right bronchus (0.5), it is wider and has a more vertical orientation (0.5)
Explain why the surgical resection of a lobe of lung doesn’t cause a V/Q mismatch. (1.5 marks)
A V/Q mismatch occurs when either ventilation or perfusion changes whilst the other does not change proportionally (0.5). When a lobe of the lung is removed, the capacity for CO2 removal (i.e. ventilation) is decreased (0.5). However, because the whole lobe has been removed including the blood vessels there is a proportional change in perfusion (0.5) therefore there is no V/Q mismatch.
What is Type II respiratory failure? Why does PCO2 increase when you give a patient with Type II respiratory failure high dose oxygen therapy? (2.5 marks)
Type II respiratory failure is caused by the failure of ventilation (0.5) which is characterised by increased PaCO2 and decreased or normal PaO2 (0.5). Giving O2 may fix hypoxaemia but the hypoxaemia is not the primary problem. Giving high dose O2 will increase the concentration of O2 in all alveoli, even the poorly ventilated alveoli (0.5). Increased O2 results in an increase in NO production which causes local vasodilation (0.5) which causes an increase in perfusion without a proportional increase in ventilation .’. worsening the V/Q mismatch → ↑ PaCO2 (0.5).
Name and give a brief description of the pathophysiology of the 4 phases of lobar pneumonia. (4 marks)
Phases of Lobar Pneumonia
- *Phase 1: Congestion** (0.5)
- ↑ vascular permeability and blood flow (vascular congestion) → exudation of serum and fibrin and a small number of neutrophils (0.5)
- *Phase 2: Red Hepatisation** (0.5)
- Vascular congestion + RBCs (give the red colour) and neutrophils extravasate into the alveolar space (0.5)
- the exudate fills the alveolar sacs (consolidation) and the lung looks like the liver
- *Phase 3: Grey Hepatisation** (0.5)
- RBCs are broken down whilst neutrophils persist → consolidation becomes paler (i.e. why it’s grey hepatisation) (0.5)
- *Phase 4: Resolution** (0.5)
- The exudate is broken down enzymatically and removed by macrophages and by coughing (0.5)
Outline the cough reflex. (3 marks)
= b. Isoniazid
= d. A TB granuloma and hilar lymphadenopathy
= a. Ziehl-Nielson stain
= D. Rifampicin
Haematogenous spread of mycobacterium tuberculosis results in:
- a. Miliary TB
- b. Tuberculous septicaemia
- c. Post-primary TB
- d. Secondary TB
Haematogenous spread of mycobacterium tuberculosis results in:
- a. Miliary TB
- b. Tuberculous septicaemia
- c. Post-primary TB
- d. Secondary TB
List 4 risk factors for TB. (2 marks)
What are the two things that are required for TB to be infectious? (1 mark)
The patient must have pulmonary TB (0.5) and they must have a positive smear (TB detected in the sputum) (0.5)
List 5 public health interventions to control TB (2.5 marks)
- Treat patients with active TB (0.5)
- Find cases (via contact tracing) and treat them before they become infectious (0.5)
- Treat latent TB (0.5)
- Isolate infectious cases (0.5)
- Vaccination (not commonly done in Australia) (0.5)
Give 4 differential diagnoses for haemoptysis (2 marks).
Give 4 differential diagnoses for haemoptysis (2 marks).
Describe the immunopathogenesis of primary tuberculosis (10 marks)
time and time again this year, my advice would be to use the year to brush up on it so you can handle any tough immuno questions that will inevitably come up] If the APC secretes IL-12 (0.5), IL-18 (0.5) and IFNγ (0.5), the CD4 helper cells will differentiate into TH1 cells (0.5) (the types of cytokines released depend on the microenvironment that they are in i.e. rabbit hole material well beyond 2nd year). TH1 cells secrete IFNγ (0.5) which activates macrophages and enables them contain the MTb infection (0.5) by: stimulating the formation and maturation of the phagolysosome, production of reactive nitrogen intermediates and mobilises antimicrobial peptides (0.5). Activation of macrophages by IFNγ causes them to differentiate into epithelioid histiocytes that aggregate to form granulomas (0.5), some coalesce to form multinucleated giant cells (0.5). Other cytokines like TNFα attract other macrophages and immune cells (0.5) that contribute to the formation of a caseating granuloma surrounded by lymphocytes and fibrosis (0.5).
Christopher, 72, is visiting Dr Hall for a follow up regarding his congestive heart failure. He tells the GP that he feels fine when he is watching the TV but struggles to keep up with the grandkids when they take the dog for a walk. He says that he feels breathless after about 10-15 minutes of walking. Dr Hall checks the New York Heart Association’s classification system for assessing a patient with heart failure’s functional capacity. Christopher has:
- a. Class I heart failure
- b. Class II heart failure
- c. Class III heart failure
- d. Class IV heart failure
Christopher, 72, is visiting Dr Hall for a follow up regarding his congestive heart failure. He tells the GP that he feels fine when he is watching the TV but struggles to keep up with the grandkids when they take the dog for a walk. He says that he feels breathless after about 10-15 minutes of walking. Dr Hall checks the New York Heart Association’s classification system for assessing a patient with heart failure’s functional capacity. Christopher has:
- a. Class I heart failure
- b. Class II heart failure
- c. Class III heart failure
- d. Class IV heart failure
Which of the following is not a possible cause of an NSTEMI:
- a. Embolisation of a thrombus into a small intramural vessel
- b. Partial occlusion of a coronary vessel
- c. Global hypotension
- d. Complete occlusion of a coronary vessel
Which of the following is not a possible cause of an NSTEMI:
- a. Embolisation of a thrombus into a small intramural vessel
- b. Partial occlusion of a coronary vessel
- c. Global hypotension
- d. Complete occlusion of a coronary vessel
Which of the following statements about concentric hypertrophy is correct?
- a. It occurs in response to volume overloading and new sarcomeres are created in parallel
- b. It occurs in response to volume overloading and new sarcomeres are created in series
- c. It occurs in response to pressure overloading and new sarcomeres are created in series
- d. It occurs in response to pressure overloading and new sarcomeres are created in parallel
Which of the following statements about concentric hypertrophy is correct?
- a. It occurs in response to volume overloading and new sarcomeres are created in parallel
- b. It occurs in response to volume overloading and new sarcomeres are created in series
- c. It occurs in response to pressure overloading and new sarcomeres are created in series
- d. It occurs in response to pressure overloading and new sarcomeres are created in parallel
What are the macroscopic features you would expect to find in the heart of a patient who was 8 days post-STEMI?
- a. A yellow-brown discolouration of the infarcted region with a hyperaemic border
- b. Grey-white fibrosis in the infarcted area
- c. Pallor of the infarcted region with some hyperaemia
- d. No gross changes or dark mottling of the infarcted area
What are the macroscopic features you would expect to find in the heart of a patient who was 8 days post-STEMI?
- a. A yellow-brown discolouration of the infarcted region with a hyperaemic border
- b. Grey-white fibrosis in the infarcted area
- c. Pallor of the infarcted region with some hyperaemia
- d. No gross changes or dark mottling of the infarcted area
A 25 year old athlete dies suddenly during basketball practice. What was the most likely cause of his sudden cardiac death?
- a. Dilated Cardiomyopathy
- b. Restrictive Cardiomyopathy
- c. Hypertrophic Cardiomyopathy
- d. Massive pulmonary embolism causing catastrophic right heart failure
A 25 year old athlete dies suddenly during basketball practice. What was the most likely cause of his sudden cardiac death?
- a. Dilated Cardiomyopathy
- b. Restrictive Cardiomyopathy
- c. Hypertrophic Cardiomyopathy
- d. Massive pulmonary embolism causing catastrophic right heart failure
Statins are one of the commonest drugs used to treat hyperlipidaemia. Outline their mechanism of action. (2.5 marks)
Interpret the following ECG (5 marks)
What are the signs and symptoms of left heart failure? (3 marks)
A patient has 120ml in their left ventricle after atrial systole. After ventricular systole, 40ml remains in the ventricle. Calculate the ejection fraction. (1 mark)
Elaine is a 54 year old smoker who has come to your practice for her yearly check up. You order a fasting blood glucose test and lipid studies. Her blood pressure is 149/92. Her blood glucose level is 6.8 mmol/L, total cholesterol is 6.7 mmol/L, LDL is 4.5 mmol/L and HDL is 0.9 mmol/L. Using the charts on the next page, calculate her 5-year cardiovascular risk. What would her risk be if she was not a smoker? (1.5 marks)
Coeliac disease is associated with:
- a. HLA-DQ2
- b. HLA-B27
- c. HLA-DR2
- d. HLA-DP8
Coeliac disease is associated with:
- a. HLA-DQ2
- b. HLA-B27
- c. HLA-DR2
- d. HLA-DP8
Guillain-Barre syndrome, acute inflammatory demyelinating polyradiculopathy, is commonly associated with diarrhoea caused by:
- a. Salmonella typhi
- b. Entamoeba histolytica
- c. Campylobacter jejuni
- d. Clostridium botulinum
Guillain-Barre syndrome, acute inflammatory demyelinating polyradiculopathy, is commonly associated with diarrhoea caused by:
- a. Salmonella typhi
- b. Entamoeba histolytica
- c. Campylobacter jejuni
- d. Clostridium botulinum
Haemolytic uraemic syndrome is strongly associated with which of the following species of E. coli?
- a. ETEC O104:H4
- b. EHEC O111
- c. EHEC O26
- d. EHEC O157:H7
Haemolytic uraemic syndrome is strongly associated with which of the following species of E. coli?
- a. ETEC O104:H4
- b. EHEC O111
- c. EHEC O26
- d. EHEC O157:H7
Which of the following statements is true?
- a. Flexible sigmoidoscopy is cannot be done without sedation
- b. Flexible sigmoidoscopy is both diagnostic and therapeutic
- c. Colonoscopy has a higher risk of perforation than flexible sigmoidoscopy
- d. Flexible sigmoidoscopy can reach the hepatic flexure
Which of the following statements is true?
- a. Flexible sigmoidoscopy is cannot be done without sedation
- b. Flexible sigmoidoscopy is both diagnostic and therapeutic
- c. Colonoscopy has a higher risk of perforation than flexible sigmoidoscopy
- d. Flexible sigmoidoscopy can reach the hepatic flexure
Which of the following stool tests might you use to investigate inflammatory bowel disease?
- a. Calprotectin and lactoferrin
- b. Lactoferrin and 5-HIAA
- c. 5-HIAA and lactoferrin
- d. Faecal elastase and calprotectin
Which of the following stool tests might you use to investigate inflammatory bowel disease?
- a. Calprotectin and lactoferrin
- b. Lactoferrin and 5-HIAA
- c. 5-HIAA and lactoferrin
- d. Faecal elastase and calprotectin
What are the 4 ways to block a tube? (2 marks)
- Luminal
- Mural
- Extramural
- Loss of function
What are the 5 broad pathophysiological mechanisms of diarrhoea? (2.5 marks)
- Deranged motility associated diarrhoea
- Osmotic diarrhoea
- Malabsorption associated diarrhoea
- Exudative/inflammatory diarrhoea
- Secretory diarrhoea
(0.5 marks each, max 2.5 marks)