TOTW #6 - Immunology 25 challenging trivia questions on Physiology Start QuizPage 1 of 25 Extracellular fluid in adults differs from intracellular fluid in that its Volume is greater Tonicity is lower Sodium : Potassium molar ratio is higher pH is lower Page 2 of 25 Blood group antigens (agglutinogens) are Carried on the haemoglobin molecule Glycoproteins Equally immunogenic Inherited as recessive Mendelian characteristics Page 3 of 25 Which is false? A person with group A blood Has anti-B antibody in the plasma May have the genotype AB May have a parent with group O blood Whose partner is also A can only have children of groups A or O Page 4 of 25 The pH of: arterial blood normally ranges from 7.2 to 7.6 blood is directly proportional to the PCO2 blood is directly proportional to [HCO3] urine is usually greater than 7 Page 5 of 25 Cerebrospinal fluid Is an ultrafiltrate of plasma Is the main source of the brain’s nutrition Has the same pH as arterial blood Has a lower glucose concentration than has plasma Page 6 of 25 Which neuroglia are responsible for forming the myelin sheath around axons in the peripheral nervous system? Microglia Astrocytes Oligodendrocytes Schwann cells Page 7 of 25 Skeletal muscle is described by all the following EXCEPT? Striated Voluntary Autorhythmic Peripherally located nuclei Page 8 of 25 Sodium-glucose cotransport is an example of: Primary active transport Secondary active transport Facilitated diffusion Passive transport Page 9 of 25 Which of the following messengers listed below remains bound to the plasma membrane? Diacylglycerol Ca2+ IP3 cAMP Page 10 of 25 In a healthy well-hydrated male weighing 70kg, the volume of distribution of intravenously administered sucrose is about: 4.5 liters 10.5 liters 14 liters 28 liters 3 liters Page 11 of 25 Which of the following causes rigor in skeletal muscle? An increase in intracellular Ca2+ levels A decrease in intracellular Ca2+ levels An increase in ATP level A decrease in ATP level Page 12 of 25 Which of the following has a much lower concentration in the CSF than in cerebral capillary blood? Na+ K+ Osmolarity Protein Page 13 of 25 When a person moves from a supine to a standing position, which of the following compensatory changes occurs? Decreased heart rate Increased contractility Decreased total peripheral resistance Increased PR interval Page 14 of 25 Which of the following is the site of highest airway resistance? Alveoli Largest bronchi Medium-sized bronchi Smallest bronchi Page 15 of 25 Secretion of K+ by the distal tubule is decreased by Metabolic alkalosis Hyperaldosteronism Spironolactone administration Thiazide diuretic administration Page 16 of 25 Which of the following proteins is most likely to be the product of a proto-oncogene? Growth factor receptor Cytoskeletal protein Sodium channels Myosin light chain Page 17 of 25 The resting potential of a myelinated nerve fiber is primarily dependent on the concentration gradient of which of the following ions? Ca++ Na+ Cl- K+ Page 18 of 25 Which of the following structures will have the slowest rate of conduction of the cardiac action potential? Atrial muscle Anterior internodal pathway A-V bundle fibers Ventricular muscles Page 19 of 25 The GFR of a 26-year-old man with glomerulonephritis decreases by 50% and remains at that level. For which substance would you expect to find the greatest increase in plasma concentration? Creatinine K+ Glucose Na+ Page 20 of 25 Which of the following is best described as an elongated, encapsulated receptor found in the dermal pegs of glabrous skin that is especially abundant on lips and fingertips? Merkel cell Free nerve endings Meissner corpuscle Ruffini endings Page 21 of 25 The second messengers in the phosphatidyl inositol cascade are: IP3, DAG and calcium Protein kinases A (PKA) and C (PKC) cAMP and cAMP dependent PKA cGMP and calcium Page 22 of 25 How many subunits do G proteins have? 1 2 3 4 Page 23 of 25 1. Dimerization of which of the following hormone receptors is essential for signalling? Acetylcholine receptor Beta 2 adrenoceptor Growth hormone receptor Histamine receptor Page 24 of 25 The rate of diffusion of a substance across the cell membrane is inversely proportional to: Concentration gradient Diffusion coefficient Surface area for diffusion Thickness of membrane Page 25 of 25 ICF volume does not change when the intravenous fluid is isotonic hypotonic hypertonic Multiple Authors | WebsiteTOTW #26 - MicrobiologyTOTW #25 - PsychiatryTOTW #24 - BiochemistryTOTW #23 - Haematology Previous Post Time Management: Tips for Balancing Work, Study, and Social Life Next Post Dating in Medical School: A Student's Perspective