FCA1-0624
Intracellular effectors are activated by receptors on the cell surface. These receptors receive signals that are relayed by second messenger systems. In the human body, which second messenger is most abundant?
Archives: FRCA Part 1
FCA1-0625
Useful diagnostic information can be obtained from measuring the osmolality of biological fluids. Of the following physical principles, which is the most accurate and reliable method of measuring osmolality?
FCA1-0626
A 25-year old lady is in the operating room and has had general anaesthesia for a knee arthroscopy. Induction was done with fentanyl 1mcg/kg and propofol 2mg/kg. A supra-glottic airway was inserted and using and air oxygen mixture with 2.5% sevoflurane, her anaesthesia was maintained. The patient is allowed to spontaneously breathe using a Bain circuit, and the fresh gas flow is 9L/min. Over the next 30 minutes, the end-tidal Co2 rises from 4.5kPa to 8.4kPa, and the baseline reading on the capnograph is 0kPa. The most appropriate initial action is which of the following?
FCA1-0627
A 45-year old gentleman is in the operating room to have a knee arthroscopy under general anaesthesia. Induction is done using fentanyl 1mcg/kg and propofol 2mg/kg. A supraglottic airway is inserted and the mixture used to maintain anaesthesia is and air oxygen mixture and 2.5% sevoflurane. Using a Bain circuit, the patient breathes spontaneously and the fresh gas flow is 9L/min. Over the next 30 minutes, the end-tidal CO2 increase from 4.5kPa to 8.4kPa, and the baseline reading on the capnograph is 0kPa. The most appropriate action that should follow is:
FCA1-0615
The following statement is true with regards to the Nernst equation:
FCA1-0616
All of the statements describing the blood brain barrier are false EXCEPT:
FCA1-0617
Which of the following statements is true with regards to the Krebs’ cycle (also known as the tricarboxylic acid cycle or citric acid cycle)?
FCA1-0618
All of the following statements about cerebrospinal fluid are incorrect except:
FCA1-0619
Which statement best describes the bispectral index (BIS)?
FCA1-0620
A 57-year old lady is admitted to the Emergency Department with signs of a subarachnoid haemorrhage. On admission, her GCS was 7. She has been intubated, sedated and is being ventilated and is waiting for a CT scan. Her Blood pressure is 140/70mmHg. The arterial blood gas analysis shows the following: pH 7.2 (7.35 – 7.45), PaO2 70 mmHg (80-100), PaCO2 78 mmHg (35-45), BE -3 mEq/L (-3 +/-3), Standard bic 27 mmol/L (21-27), SaO2 94%. The most likely cause of an increase in the patient’s global cerebral blood flow (CBF) is which of the following?