1) An area of skin innervated by sensory nerves is called a) dermatome b) ventral root c) dermal receptor d) dorsal root 2) The following are plexus names EXCEPT a) cervical b) thoracic c) lumbar d) brachiaL 3) Norepinephrine is released from a) all autonomic nerves b) parasympathetic nerves c) the vagus nerve d) sympathetic nerves 4) The following could occur together effectively EXCEPT a) increase heart rate b) sweating c) digestion d) pupil dilation 5) A tract is collection of fibers (axon) in a) Central nervous system b) Peripheral nervous system c) Autonomic nervous system d) Somatic nervous system 6) Which of the following carry sensory impulses to the CNS from receptors in muscle or skin a) general somatic efferent fibers b) general somatic afferent fibers c) general visceral afferent fibers d) general visceral efferent fibers 7) Acetylcholine is decomposed by _____almost as fast as it is released a) monoamine oxidase b) MAO inhibitors c) norepinephrine d) acetylcholinesterase 8) The following belong together EXCEPT which one a) norepinephrine b) acetylcholine c) epinephrine d) adrenalin 9) The primary neurotransmitter from the parasympathetic system that influences its autonomic targets is? a) Acetylcholine. b) Adenosine. c) Norepinephrine. d) Nopamine. e) Ch21: Water & Electrolytes 10) Where is most water found in the body a) blood plasma b) ☒ whole blood c) ☒ tissue spaces d) ☑ in cells 11) Where is most water found in the body a) blood plasma b) whole blood c) tissue spaces d) in cells 12) Which of these is relatively high in extracellular fluids a) Potassium b) Calcium c) Phosphate d) Sodium 13) What is the most abundant extracellular cation a) K+ b) Mg++ c) Cl- d) Na+ 14) What is the main force that causes fluid to leave the plasma compartment a) osmosis b) hydrostatic c) dialysis d) filtration 15) What is the greatest regulator of water intake a) kidneys b) gastrointestinal system c) adequate diet d) hypothalamus 16) The greatest amount of body water is lost through a) sweating b) defecation c) urine d) breathing 17) Excessive vomiting usually results in the phenomenon of a) water intoxication b) dehydration c) edema d) hypoproteinemia 18) Which ion is directly related to calcium homeostasis a) Mg++ b) K+ c) PO43- d) Cl- 19) Which cells are most sensitive to electrolyte changes a) osteoblasts b) epithelial c) leukocytes d) neurons 20) Which is the most abundant intracellular cation a) PO43- b) HCO3- c) Cl- d) K+ 21) What will happen when erythrocytes are placed in a hypotonic solution a) will swell b) will shrink c) will change d) will move 22) What minimum amount of body water loss can the osmoreceptors in the hypothalamus detect a) 1% b) 5% c) 10% d) 15% 23) Which hormone control regulation of Calcium a) Calcitonin & PTH b) Calcitonin & aldolsteron c) Aldosteron & PTH d) Aldosteron & renin 24) The supporting cells that form myelin sheaths in the peripheral nervous system are a) Satellite cells b) Schwann cells c) Astrocytes d) Microglia 25) A collection of neuron cell bodies located outside the CNS is called a) A tract b) A nucleus c) A nerve d) A ganglion 26) Which of these neurons are unipolar a) Sensory neurons b) Somatic motor neurons c) Neurons in the retina d) Automatic motor neurons 27) Depolarization of an axon is produced by? a) Inward diffusion of sodium b) Active extrusion of potassium c) Outward diffusion of potassium d) Inward active transport of sodium 28) Repolarization of an axon during an action potential is produced by a) Inward diffusion of sodium b) Active extrusion of potassium c) Outward diffusion of potassium d) Inward active transport of sodium 29) Which of these is not a characteristic of synaptic potentials a) They are all or none in amplitude b) They decrease in amplitude with distance c) They are produced in dendrites and cell bodies d) They are graded in the amplitude 30) The summation of EPSPs from numerous presynaptic nerve fibers converging onto one postsynaptic neuron is called a) Spatial summation b) Long-term potentiation c) Temporal summation d) Synaptic plasticity 31) Which of these statements about ACh receptors is false a) Skeletal muscles contain nicotinic ACh receptors b) The heart contains muscarinic ACh receptors c) Stimulation of ACh receptors produces tachycardia d) Autonomic ganglions contains ACh receptors 32) Which of these may be produced by the action of muscarinic receptors in the heart a) Tachycardia b) Bradycardia c) Broncho-constriction d) Mydriasis 33) A neurotransmitter, Norepinephrine is released a) Sympathethic preganglionic fibers b) ParaSympathethic preganglionic fibers c) Sympathethic postganglionic fibers d) Autonomic preganglionic fibers 34) Which cranial nerves are parasympathetic a) CNI, CNIII, CNV, CNIX b) CNIII, CNV, CNIX, CNX c) CNIII, CNVII, CNIX, CNX d) CNV, CNIX, CNX, CNXI 35) Main function of Parasympathetic nervous system is a) Fight or Flight b) Rest and Digest c) Relax and Flight d) Digest and Feed

physiology

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