/60 497 Physiology Preparation (Dr. Aim Sothea) 1 / 60 1) What type of speech does Broca’s area control? a. Speech reasoning b. Speech understanding c. Speech hearing d. Speech production 2 / 60 2) What is the main force that causes fluid to leave the plasma compartment? a. osmosis b. hydrostatic c. dialysis d. filtration 3 / 60 3) Which is the most abundant intracellular cation? a. HCO3- b. K+ c. PO43- d. Cl- 4 / 60 4) Excessive vomiting usually results in the phenomenon of 😕 a. water intoxication b. dehydration c. edema d. hypoproteinemia 5 / 60 5) What will happen when erythrocytes are placed in a hypotonic solution? a. will swell b. will move c. will shrink d. will change 6 / 60 6) A neurotransmitter, Norepinephrine is released? a. Autonomic preganglionic fibers b. Sympathethic postganglionic fibers c. Sympathethic preganglionic fibers d. ParaSympathethic preganglionic fibers 7 / 60 7) Acetylcholine is decomposed by _____almost as fast as it is released.? a. MAO inhibitors b. acetylcholinesterase c. monoamine oxidase d. norepinephrine 8 / 60 8) Which of these statements about ACh receptors is false? a. The heart contains muscarinic ACh receptors b. Skeletal muscles contain nicotinic ACh receptors c. Stimulation of ACh receptors produces tachycardia d. Autonomic ganglions contains ACh receptors 9 / 60 9) Depolarization of an axon is produced by? a. Active extrusion of potassium b. Inward diffusion of sodium c. Outward diffusion of potassium d. Inward active transport of sodium 10 / 60 10) Diffusion of which of the following ions into the synaptic knob triggers the release of neurotransmitter? a. Ca2+ b. K+ c. Cl– d. Na+ 11 / 60 11) A tract is collection of fibers (axon) in? a. Somatic nervous system b. Autonomic nervous system c. Peripheral nervous system d. Central nervous system 12 / 60 12) Which of these neurons are unipolar? a. Neurons in the retina b. Automatic motor neurons c. Sensory neurons d. Somatic motor neurons 13 / 60 13) Which of the following terms describes an accumulation of nerve cell bodies in the PNS? a. peripheral nerve b. ganglion c. nucleus d. gray matter 14 / 60 14) Where are neurotransmitter receptors located? a. nodes of Ranvier b. presynaptic membrane c. synaptic vesicle membranes d. postsynaptic membrane 15 / 60 15) A change in a dendrite which lessens the probability of a conduction is:? a. threshold potential b. action potential c. Inhibitatory Post-Synaptic Potential d. Excitatory Post-Synaptic Potentia 16 / 60 16) Which hormone control regulation of Calcium? a. Calcitonin & aldolsteron b. Calcitonin & PTH c. Aldosteron & renin d. Aldosteron & PTH 17 / 60 17) Which of the following descriptions is accurate? a. A neuron has many axons, which receive information b. A neuron has many dendrites, which send information c. A neuron has a single axon, which sends information d. A neuron has a single dendrite, which sends information 18 / 60 18) The summation of EPSPs from numerous presynaptic nerve fibers converging onto one postsynaptic neuron is called? a. Long-term potentiation b. Synaptic plasticity c. Spatial summation d. Temporal summation 19 / 60 19) Which of these may be produced by the action of muscarinic receptors in the heart? a. Tachycardia b. Mydriasis c. Bradycardia d. Broncho-constriction 20 / 60 20) Which of these is not a characteristic of synaptic potentials? a. They are produced in dendrites and cell bodies b. They are graded in the amplitude c. They decrease in amplitude with distance d. They are all or none in amplitude 21 / 60 21) What is first component of reflex arch? a. Motor neuron b. Muscle or glance c. Sensory neuron d. Interneuron 22 / 60 22) Which type of short neuron is found in the retina? a. tripolar b. unipolar c. bipolar d. multipolar 23 / 60 23) A collection of neuron cell bodies located outside the CNS is called? a. A tract b. A ganglion c. A nerve d. A nucleus 24 / 60 24) Main function of Parasympathetic nervous system is? a. Rest and Digest b. Relax and Flight c. Digest and Feed d. Fight or Flight 25 / 60 25) The phagocytic cells in the CNS are:? a. astrocytes b. microglia c. oligodendrocytes d. ependymal cells 26 / 60 26) A common feature of action potentials is that they:? a. cause the membrane to hyperpolarize and then depolarize. b. move at the same speed along all axons. c. are triggered by a depolarization that reaches the threshold. d. can undergo temporal and spatial summation. 27 / 60 27) The primary neurotransmitter from the parasympathetic system that influences its autonomic targets is? a. Ch21: Water & Electrolytes b. Acetylcholine. c. Adenosine. d. Norepinephrine. e. Nopamine. 28 / 60 28) Repolarization of an axon during an action potential is produced by? a. Outward diffusion of potassium b. Inward diffusion of sodium c. Inward active transport of sodium d. Active extrusion of potassium 29 / 60 29) Which cranial nerves are parasympathetic? a. CNV, CNIX, CNX, CNXI b. CNIII, CNV, CNIX, CNX c. CNI, CNIII, CNV, CNIX d. CNIII, CNVII, CNIX, CNX 30 / 60 30) Sensory speech area in the brain is called:? a. Broca area b. Peripheral nervous system (PNS) c. Wernicke area d. Auditory area e. Visual area 31 / 60 31) What minimum amount of body water loss can the osmoreceptors in the hypothalamus detect? a. 5% b. 10% c. 15% d. 1% 32 / 60 32) The resting potential of a neuron is 😕 a. +30 mv b. -70 mv c. -90 mv d. 0 mv 33 / 60 33) The cells that produce myelin in the PNS are:? a. axons b. oligodendrocytes c. ependymal d. Schwann 34 / 60 34) The minimal stimulus needed to cause a neuron to transmit an impulse is called the:? a. resting potential b. action potential c. refractory period d. threshold 35 / 60 35) Norepinephrine is released from:? a. parasympathetic nerves b. all autonomic nerves c. sympathetic nerves d. the vagus nerve 36 / 60 36) The following are plexus names EXCEPT:? a. cervical b. thoracic c. brachiaL d. lumbar 37 / 60 37) The greatest amount of body water is lost through: ? a. breathing b. sweating c. urine d. defecation 38 / 60 38) What is the greatest regulator of water intake? a. kidneys b. adequate diet c. gastrointestinal system d. hypothalamus 39 / 60 39) Which of the following carry sensory impulses to the CNS from receptors in muscle or skin? a. general visceral afferent fibers b. general visceral efferent fibers c. general somatic efferent fibers d. general somatic afferent fibers 40 / 60 40) The _____cells provide a means of producing myelin? a. microglia b. oligodendrocyte c. ependymal d. astrocyte 41 / 60 41) Which ion is directly related to calcium homeostasis? a. Cl- b. Mg++ c. PO43- d. K+ 42 / 60 42) The supporting cells that form myelin sheaths in the peripheral nervous system are ? a. Microglia b. Schwann cells c. Astrocytes d. Satellite cells 43 / 60 43) The following could occur together effectively EXCEPT:? a. sweating b. increase heart rate c. pupil dilation d. digestion 44 / 60 44) Which of the following does NOT belong with the rest? a. divergence b. convergence c. facilitation d. summation 45 / 60 45) An area of skin innervated by sensory nerves is called:? a. ventral root b. dermal receptor c. dorsal root d. dermatome 46 / 60 46) What happens when a resting neuron’s membrane depolarizes? a. The neuron is less likely to generate an action potential. b. The neuron's membrane voltage becomes more positive c. Central nervous system (CNS) d. There is a net diffusion of Na+ out of the cell. e. The cell's inside is more negative than the outside. 47 / 60 47) Saltatory conduction occurs when an impulse jumps from:? a. node to node b. node of Ranvier to axon c. dendrite to axon d. axon to dendrite 48 / 60 48) What is the most abundant extracellular cation? a. K+ b. Na+ c. Mg++ d. Cl- 49 / 60 49) What is daily amount of CSF in the nervous system at any given time? a. 140 mL b. 100 mL c. 1000 mL d. 500 mL 50 / 60 50) Which of the following is NOT a medullary vital center? a. vasomotor b. blood pressure c. cardiac d. respiratory 51 / 60 51) Which cells are most sensitive to electrolyte changes? a. leukocytes b. epithelial c. neurons d. osteoblasts 52 / 60 52) The following belong together EXCEPT which one? a. multipolar b. motor c. sensory d. efferent 53 / 60 53) The membrane closest to the brain is:? a. arachnoid meninx b. denticulate ligament c. pia mater d. dura mater 54 / 60 54) The cerebrospinal fluid is produced by the capillaries of the:? a. dural sinus b. choroid plexus c. lateral ventricle d. arachnoid villi 55 / 60 55) The following belong together EXCEPT which one? a. norepinephrine b. adrenalin c. acetylcholine d. epinephrine 56 / 60 56) Where is most water found in the body? a. blood plasma b. whole blood c. tissue spaces d. in cells 57 / 60 57) The following belong together EXCEPT which one? a. association neuron b. sensory neuron c. intercalated neuron d. interneuron 58 / 60 58) An inflammation of the brain coverings is termed:? a. Cerebral palsy b. Encephalitis c. Meningitis d. Poliomyelitis 59 / 60 59) Which of these is relatively high in extracellular fluids? a. Calcium b. Potassium c. Phosphate d. Sodium 60 / 60 60) The PNS is comprised of cranial nerves and:? a. sensory nerves b. spinal nerves c. motor nerves d. somatic nerves Your score isThe average score is 87% Facebook 0% Restart quiz Any comments? Send feedback