Top 550+ Solved Physiology MCQ Questions Answer

a. are not formed from precursors

b. include morphine as an example

c. form the opioid receptors in the brain

d. are mainly found in the brain and gastrointestinal tract

e. are almost always excreted unchanged

a. does not have a reflex arc like somatic nervous system

b. has dopamine as the main transmitter

c. has cholinergic division which increases activity of the intestinal musculature and increases gastric secretion

d. neurotransmitter noradrenaline is metabolised by pseudocholinesterase

e. is not involved with visceral sensation

a. tropomyosin

b. myosin

c. actin

d. troponin C

e. troponin I

a. is a feedback reflex aimed at maintaining muscle length

b. is a polysynaptic reflex

c. maintains muscle strength at various levels of muscle strength

d. is not elicited in the knee jerk which occurs after tapping

e. none of the above are true

a. glutamate and GABA

b. GABA and glycine

c. glutamate and glycine

d. glycine and aspartate

e. glutamate and aspartate

a. contraction involves the release of K+ from the terminal cisterns

b. relaxation involves the release of Ca2+ from troponin

c. prior to contraction, increase Na+ and K+ conduction occurs in the end-plate membrane

d. relaxation involves cessation of the interaction between actin and myosin

e. contraction involves inward spread of depolarisation along T tubules

a. the medullary chemoreceptors respond to a change in blood pCO2

b. the medullary chemoreceptors respond to blood (H+)

c. the predominant peripheral chemoreceptors are located in the carotid and aortic bodies

d. the peripheral chemoreceptors respond to pO2

e. the peripheral chemoreceptors respond to blood (H+)

a. has depressed conduction during anaesthesia

b. is located in the pons

c. is a simple collection of parallel nerve fibres

d. has no input from the cranial nerves

e. is electrically isolated from the cerebral cortex

a. glucose

b. creatinine

c. sodium

d. urea

a. the afferent arteriole is smaller than the efferent

b. the kidney contains 1.3 million nephrons

c. there are three layers separating the blood in the arteriole from the glomerular filtrate

d. podocytes are contractile and regulate GFR

a. it allows passage of molecules up to 4nm diameter freely, and up to 8nm with some difficulty depending on charge

b. positively charged molecules pass more easily than neutral

c. endothelial pores have a greater diameter than podocyte filtration slits

d. the basal lamina contains interruptions

a. all sections are lined with cuboidal epithelial cells with luminal microvilli

b. the thick loop of Henle rises to lie adjacent to its glomerulus

c. there are a greater number of juxtamedullary nephrons than cortical

d. the lacis cells of the juxtaglomerular apparatus secrete renin

a. the efferent arterioles are branches of the interlobular arterioles

b. the descending vasa recta vessels contain fenestrated endothelium to assist urea transport

c. the efferent arterioles empties into the peritubular network

d. the glomerular capillaries drain into the efferent vein

a. ClPAH = 630, renal blood flow = 1273ml/min

b. ClPAH = 630, renal blood flow = 700mb/min

c. ClPAH = 77, renal blood flow = 155mb/min

d. ClPAH = 777mb/min, renal blood flow = 1569mb/min

a. the pressure drop across the glomerulus is about 20mmHg

b. pressure in the renal vein is about 15mmHg

c. the glomerular capillary pressure is about 80% that of arterial

d. the greatest drop in pressure (percentage wise) is from the efferent arteriole to the peritubular capillary