Solve Physiology AIIMS 2018 1. The diluting segment of the kidney is? Ascending thick loop of Henle Collecting duct Descending loop of Henle PCT None 2. What are the ions X and Y on the conductance graph of a neuron shown below: K, Na Na, K Na, Ca Ca, Na None 3. DIfference between the electrical synapse & chemical synapse is? Direction of impulse is unidirectional Connexons are involved in electrical synapse Electrical synapse has more latent period than chemical synapse No cytoplasmic continuity between presynaptic and postsynaptic membrane None 4. Hormone degradation as an important mechanism for regulating local concentrations is seen in which of the following? Thyroid hormone deiodinases inactivating T3 118-hydroxysteroid dehydrogenase inactivation of glucocorticoids Degradation of retinoic acid by Cyp26b1 in primordial germ cells of males All of the above None 5. What are the factors that can cause a person to drink the water due to stimulation of thirst mechanism is/are Hemorrhage Prandial Drinking Dehydration All of the above None 6. What you can expect on performing a Histamine test on an individual with brachial plexus trunk injury? Central capillary dilatation -> Wheal with exaggerated surrounding flare. Central capillary dilatation -> Wheal without surrounding flare. Central capillary dilatation -> Wheal -> Surrounding flare. Absent Triple Response None 7. GFR is increased by all except Efferent arteriolar constriction Increased renal blood flow Ureteric stone Decreased oncotic pressure None 8. What is feedback mechanism of baroreceptor? Positive feedback Negative feedback Feedforward control Both negative and positive feedback None 9. The diagram given shows the pressure-volume curves for 3 different lungs. Which of the following is the best representation of compliance between the three lungs? B>A>C B>C>A A C>A>B None 10. Inhibitory control by the hypothalamus is exerted on Prolactin and growth hormone Growth hormone only Prolactin only Neither None 11. Which of the given hormones play a permissive role in the attainment of puberty? Insulin Growth Hormone Leptin GnRH None 12. Weber-Fechner law relates the magnitude of sensation to Intensity of stimulus Strength of muscle contraction Duration of stimulus Amplitude of action potential None 13. The mechanism by which glucose is absorbed in the intestine is Secondary active transport Primary active transport Facilitated diffusion Any of the above None 14. What is the earliest stage at which erythropoietin is effective in red blood cell formation? Normoblast stage Colony-forming units Burst-forming units Late erythroblast stage None 15. Integrin connects with: Cadherin Vitronectin Selectin Fibronectin None 16. The fibers that reach the Purkinje cell directly are Raphe nucleus Vestibular nucleus Inferior olivary nucleus Locus coeruleus None 17. Find the net filtration pressure across the Glomerular Basement Membrane for a patient with Glomerular ultrafiltration coefficient = 6 Glomerular hydrostatic pressure =45 Glomerular capillary oncotic pressure =20 Bowman's capsule hydrostatic pressure =10 Bowman's capsule oncotic pressure =0 15 mmHg 30 mmHg 60 mmHg 90 mmHg None 18. In a 100-m dash, most of the energy consumed by skeletal muscles to replenish ATP is derived from Aerobic glycolysis Phosphocreatine Oxidation of Fatty acids None of the above None 19. Which of the following has maximum representation In homunculus? More muscle fibres are present Low control and skilled movements Precision of movements Intensity of perception None 20. What is the position of the Golgi apparatus in serous acinar cells Apical Basal Adjacent to nucleus Supranuclear None 1 out of 20 Time's up
