NPB 101 Midterm 1 Spring 2011

NPB 101 Midterm 1 Spring 2011 - Name: Class: Date ID: A 9....

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Unformatted text preview: Name: Class: Date ID: A 9. NPR 10] Midterm 1 (Spring 2011) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Whenthemembmneisatresgionsmoveacrossthemembrane a. through voltage gated sodium channels b. because they are responding to their electrochemical gradient c. through leak channels ‘ d. b and c e. a only _ 2. the absolute refractory period, while during the relative refractory period a. Nosfimuluscancmmeanoflreracflmpotenflaldunnglpotassiumleakchamekare closing. _ b. Atypimlsfimduscangenemmanmacfimpmenfialdufinglsodiumchamelacfivafim gates are opening. c. Sodium channel inactivation dominates / an adequately strong stimulus can generate another action potential. (1. Both potassium and sodium voltage gated channels are closed during / only potassium channels are open. _ 3. Speech is coded by sound waves within the following frequencies? a. 20 - 20000 Hz d. 1000 - 4000 Hz b. 4000 - 5000 Hz . e. 100 - 150 dB c. 20 - 150 dB 4. A receptive field is defined as: a. the region of the cortex to which a sensory receptor projects b. greater cortical representation of some body parts as compared to other body parts 0. the area of skin that encompasses two pin pricks d. The portion of the stimulus detected by a single receptor 5. The primary function associated with the Cerebellum is a. control and‘coordination of movement b. providing a link between the nervous and endocrine systems c. emotions and motivation d. preliminary sensory processing e. control of basic bodily fimcfions such as cardiovascular and respiratory control 6. The 5 generic components of any reflex are (in order): efl‘erent, vesicle, huegrator, receptor a receptor, afi‘erenL/integrator, efl‘erent, effector efi‘ector, spinal cord, receptor, aflerent, synapse action potential, gap junction, synapse, receptor, terminal axon, soma, dendrite, nucleus, terminal 9999'!” ID:A 7. What parameters are coded by the amplitude of the sine wave in the visual and auditory systems, respectively? a. visual: loudness / auditory. pitch d. visual: brightness / auditory". loudness b. visual: color / auditory: brightness e. none of the above c. visual: color/ auditory: loudness 8. Neuropeptides a. aresymhesizedinflieeytosoloftheaxonterminal b. are sometimw co-secreted along with classical neurotransmitters c. act on presynaptic sites only d. all of these - 9. 'Ihefimctionoftheintegratorcomponentofareflexis: a. to measure temperature in the house and tum on the heater if necessary b. to the appropriate efi'erent output based on processing of afi‘erent input. 0'. to assess all information being sent out via the autonomic nervous system to the working . muscles. d. to turn efferent information into afl'erent information 10. A relaxed ciliary muscle will result in a a. relaxed radial muscles d. relaxed suspensory ligaments b. a stronger lens e. a constricted pupil c. a weaker lens 11. Spinal nerves - a. contain only afferent fibers b. control sensory responses but not motor behavior c. contain integrator cells d. contain both afl’erent and efferent fibers 12. All of the following contribute to sound amplification except: a. the ossieles b. the inner hair cells c. the transfer of the wave fr0m the tympanic membrane to the oval window (1. the outer hair cells e. none of the above 13. Activity of these cells create the antagonistic outer ring of the bipolar cell receptive fields a. amaerine cells d. horizontal cells b. photoreceptors e. none of the above e. ganglion cells 14. The following is true of the parasympathetic nervous system except: it innervates essentiallythe sameorgans as are innervatedbythe sympathetic system the postganglionic fibers use acetylcholine ' fltefibersoriginatefiomthebrainandsacralspine the preganglionic fibers tend to be short the system dominates during the “rest~&-digest” response 9999*.» > A (I 15. Inthe picture, cellB is makinganinhibitory connection with cellAand cellC ismaking an inhibitory connection with B. Assume that cell B is tonically active (steadily releasing neurotransmitter). What will be the effect on membrane potential of cell A when cell C also becomes active (releases neurotransnfitter)? a. move away from threshold c. hyperpolarize b. depolarize d. none of the above 16. The Na+/K+ pump a. contributes significantly to the resting membrane potential b. moves two sodium ions in for every 3 potassium ions it moves out o. is an ATP-driven pump d. c only 6. a and c 17. Which of the following is/are true of the plasma membrane? a. It is lipophilic at its edges and hydrophilic in the middle b. It is composed of two rows of phospholipid molecules c. It contains cholesterol and is a fluid structure d. b only e. b and c __ 18. Binding of scent signals to olfactory receptors 3.. activates G proteins b results in cAMP production c. opens sodium channels d. a and b c. all of these _ l9. Topographic organization can be described as and can be found in these two systems a. More cortex is devoted to processing sensation in a persons lips as compared to their knee / somatosensory and vestibular b. Neighboring regions of the stimulus field project to neighboring regiOns in the cortex / visual & somatosensory c. Objects in the visual world that are high in the visual field project at the top of the cortex I visual and auditory (1. none of the above 20. 21. 22. 23 .' 24. 25. 26. ID:A Bending the stereocilia toward the leads to in the hair cell a. hyperpolarization d. c b. influx of sodium e. b and c c. depolarization What contributes to the influx of potassium through the mechanically gated channels in the auditory and vestibular hair cells? ' a. abundance of amino acids in the endolymph b abimdanceofpotassiumintheendolymph _ c. absence of sodium in the endolymph d. b only 6 a and b The following are true regarding cranial nerves extent? a they contain both sensory and motor fibers b. allbutvagusnerveservetheheadandneck c. most come ofi‘ the spinal cord fiom between the upper cervical vertebra d there are 12 of them e none of the above Neuron to neuron communication via the chemical synapse involves all of the following steps amt: a. potassium influx at the terminal causes vesicles to move to and fuse with the presynapfic membrane. neurotransmitter is released into the synaptic cleft voltage-wed calcium channels in the synaptic terminal are opened neurotransmitter binds to a receptor 0n the postsynaptic membrane action potential reaches the axon terminal sap-99‘ The voltage at which there is no net movement of an ion across the membrane is called a. the GHK potential d. the resting potential b. the action potential e. the nemst potential 0. Ohm’s Law All of the following contribute to conduction velocity in action potential propagation except: a. diameter of the axon - b. insulation by myelin c. ionic leaks across the membrane d. cancentration difference of sodium across the membrane Thetmnsmission ofthe fluid waveinthe cochlea fi‘omthesealavestibuli aroundthehelioctremaanddownflte scala tympani leads to ‘ ' > a. transduction ofsoundinthetectorial membrane b. transduction of sound in the organ of corti c. activation of auditory hair cells d. dissipation of the energy wave e. damage to the tympanic membrane 28. 29. 30. 9.9-9.5“? . The peripheral nervous system as a whole can be generally divided into a. integrator aml output divisions b. sympathetic and parasympathetic divisions c. afi‘ereut and efferent divisions d. motor and sensory All of the following characterize an action potential except: it is an “all-or-none” event A itisthesamesizeattheaxonhillockandattheaxontemunal the fist rising phase is due to activation of sodium ligand gated channels c only ‘ b and c Myelin sheaths are composed of membranes of a. astrocytes / oligodendrocytes‘ b. oligodendrocytes / schwann cells c. amacriue cells I schwann cells Atrestthe while,duringanactionpotential . a membrane is most permeable to potassium aud'less permeable to sodium / the membrane is completely penumble to sodium and not permeable to potassium at all. b. passive flux of ions occurs through sodium and potassium leak channels I voltage gated sodium and potassium channels come into play. c. sodium potassium pump is creating the membrane potential I ligand gated potassium channels dominate the system. (1. the cell depolarizes toward zero I calcium influx causes the vesicles to load with neurotransmitter in the CNS and d. ependymal cells / schwann cells 6. oligodendrocytes / microglia in the PNS. ...
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NPB 101 Midterm 1 Spring 2011 - Name: Class: Date ID: A 9....

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