PTS Phase 1 SBA questions 2021 Flashcards
What type of protein structure would zinc fingers, helix-turn-helix and beta-alpha-beta be classed as?
Super-secondary
A pathologist was analysing some samples. She used a histological stain on brush borders and hexose sugars which produced a magenta colour. Which stain did she use?
Periodic acid schiff
It stains brush borders and hexose sugars dark pink (magenta).
You order a blood test for a patient, whom you suspect may have a parasitic infection. Which type of blood cell is typically elevated in parasitic infections?
Eosinophil
A patient has been diagnosed with hypertension. Blood tests show that atrial natriuretic peptide (ANP) levels are elevated. Which of the following has a similar function to ANP?
Adrenaline acting on α2 receptor
Fragments of the respiratory tract constitute the anatomic dead space. It’s a part of physiological dead space- an area where gas exchange does not occur. Which part of the anatomic dead space has got the largest area?
Trachea
Airway smooth muscle constriction is stimulated by Ach release acting on which type of receptors?
M3 subtype of muscarinic receptors
A patient with a history of Sjogren’s syndrome comes to your clinic. A key aspect of Sjogren’s syndrome is lack of saliva. Which of the following is NOT a component of saliva?
Protease and peptidase
Which enzyme hydrolyses triglycerides?
Hepatic lipase
Lipoprotein lipase
Triglyceride lipase
Aminotransferase
Gamma-glutamyl transferase
Lipoprotein lipase
The pancreas is formed from a fusion of a ventral and dorsal bud. Which areas of the pancreas does the ventral pancreatic bud form?
Uncinate process, main pancreatic duct and pancreatic head
What initiates the cephalic phase of pancreatic secretion?
Seeing food
Within a distribution of data, if the median is greater than the mean of the data, what is the data described as?
Negatively skewed
Which of the structures below function as interneurons that are stimulated by alpha motor neurons and through a feedback system can also be inhibited by alpha motor neurons causing autoinhibition
Weibel-Palade bodies
Renshaw Cells
Delta cells
Oligodendrocytes
Renshaw Cells
A 20 year old boy presents to his GP with loss of taste and any sensation at the back of his tongue. Which cranial nerve innervates the posterior 1/3 of the tongue?
Glossopharyngeal nerve
The urogenital organs are developed from which layer of the germ cells?
Intermediate mesoderm
What level does the renal artery come off the abdominal aorta?
L2