2009exam2key - Name EID Quiz 2 BME 365R Nov 5 2009 I Short...

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Unformatted text preview: Name EID Quiz 2 BME 365R Nov. 5, 2009 I. Short Answer, Feedback Systems and Controllers (2 points each) The following Bode Amplitude Plot is measured for a subject while taking a TDL test: —40 db/decade I. Write the closed-loop transfer function: For the negative feedback system shown above, answer these questions: 2. Closed loop gain (Bo/9i) ®>KG(s)/(1+KG(S)H(S)) b. 1/(1+KG(s)H(s)) c. KG(s)H(s) d. KG(s)/(l-KG(s)H(s)) 3. Assume G(s) = l and H(s) = 1. How large must K be to ensure that a 10% change in feed-forward gain will result in only a 0.1% change in closed loop gain? a. 9 l b.990 5" : ’—- 0".) o.olro.0IK:l c.9990 a, 1+Klll ( o.oll< = 0.9? 0‘00, 0.,5q/K = O.[ 4. To improve frequency response. You would want to: a. make K very large b. make K very small c. make H constant, independent of fi'equency d annc S. If k=105 , G(s)= s, and H(s)= 10, then the closed loop transfer function is: a.10:(s+106g Q/SI. _ K65) b. 10 /(s+10) r . . . .ls/(s+1o-6) (4 ((5?) ff/S/ .10'2/(54-103) {A {5 _ (‘I' la 3’5 (la ) .. r453 ’M) 015 ’4- l’ObS [V6 - ;+/b.e (lard reg: fiwsgém . The projection of this first-order neuron is in e 41”,” £i/é).p£f o the first synapse in the rau/ Commie nucleus {)0 6. Having K,- in a PID controller before the feed-forward gain will: a. decrease overshoot b. decrease settling time c. iminate steady-state error d. all of the above II. Pain and Temperature (1 point each) The first order neuron for pain and temperature synapses in the hm ’ L ’5“? . ——§.—‘ Activity is gated by {5" rat in the dorsal gray matter of the spinal cord. The lateral spinothalrnic tract is (crossed/uncrossed) C/‘6 1’3 at the level of entry. Pain and temperature project to this thalamic nucleus: 1/ #4: . III. Conscious Proprioception( 1 points each) The first order neuron for conscious proprioception has its cell body in at he level of 6 me a’ a, . The second order neuron crosses in the mfir g - :5 fibers and projects to the VP Lr nucleus of (WWW) the thalamus. The third order neuron projects to m 1104*} rue . Two diseases of the conscious progn'oception pathway are 4.8 I; and MI‘ 1 I - Jr?) _ —' ' 7"" - *—————\ IV. Unconscious Proprioception (1 point each) ~__..-. The muscle spindle gives rise to i I l 0-. and .___— afferents and is innervated by the a: a pm} . Two pathways for unconscious proprioception are 015‘ C 7' and VSrT “ awe“? MW 3...»ng V. Motor (1 points each) 70% fluid - The conicospinalfitfract begins in the momma girl‘s _ , descends in the ,‘m‘éaJZtgH-g , and crosses in the gaging 51' 5% which is at the level of the flag a. in the brainstem. The voluntary motor pathway has . The monosynaptic stretch reflex consists of the T c.. _fl____ afferents and the :2 @531 efferents. Jul VI. Cebebellum (1 point each) Cerebellar input from the 0/1”” éw/a fibers originates in the n..le alum nucleus and a ays discharges the Purkinje cells in a complex spike. Afferent cerebellar input from the cortex and unconscious proprioception pathways project in the (1105: {can fibers to the Car/eJACV‘f’u . Lateral i 'bition in the neocerebellar cortex is primarily from bu: and $ < cells. Parallel fibers originate from ,r in. cells. The output of the neocerebellum is from flag I}: cells and the output is inhibitory on the - nucleus of e cerebellum. This nucleus projects to the nucleus of the thalmus. The thalamus then projects back to ,5 I . Cerebellar sym toms are on the (same/opposite) icvmg side and include r 41195041 tremor. VII. Basal Ganglia (lpoint each) The basal gznglia consist of three nuclei: (“We , {theyb , ~ /. u f 4/ . Output from the basal anglia is in this tract: ': to the |= ( Viée {/Jihalarnic nucleus which then projects . Two nuclei closely wsoci ed with the basal ganglia are: which is destroyed in 4 disease and which produces hemiballismus. VIII. Hypothalmus and sleep (1 point each) 1. A hormone released by the neurohypothesis which causes uterine contraction: a. Thyroid hormone b. LH @xy‘tocin d. ACTH 2. Memory can be enhanced by: a. repetition b. CREB c. strong emotional association @311 of the above 3. The light-entrained pacemaker responsible for generation of the circadian rhythm in mammals is the: a. prachiasmatic nucleus b. ventro-rnedial hippocampus c. pineal body d. inferior colliculus 4. A patient who is sweaty, hyperactive, and has bulging eyes and elevated BMR probably has too much: a. growth hormone yroxine c. glucocorticoids d. ACTH 5. After an operation on a pituitary adenoma, a patient has hypotension, excessive urination, and is hyperosmotic. The likely cause is: @ow vasopressin b. low oxytocin c. high ACTH d. high TSH 6. Location of preganglionic sympathetic neuron cell bodies: a. CN nuclei @termediolateral cell column c. ganglia close to target organs (1. ganglia distant from target organs 7. Hypothalamic nucleus controlling the parasympathetic nervous system @terior hypothalamus b. posterior hypothalamus c. supra-chiasmatic nucleus d. medial nucleus 8. Why do we sleep? a. repair free-radical damage to cell membranes b. allow post-synaptic receptors to re-set I consolidation of memories @1] of the above IX. Case histories (3 points each) 1. A patient presents with a history of minor head trauma and increasing headache. On examination, the right eye is bright red. Auscultation reveals a bruit (swishing noise) around the eye. The most likely diagnosis is: a. carotid artery embolism @arotid-cavemous sinus fistula . aneurysm of the anterior communicating artery d. middle cerebral artery stenosis 2. Your roommate presents with a two year history of progressive L hearing loss and now complains of diplopia (double vision). On examination you find an inability to abduct (tum-out) the L eye, a weakness in the L upper and lower facial muscles, and L deafiiess. The location of a lesion producing all of the symptoms and signs is: a. mesencephalon b. pens @onto-medullary junction d. medullary pyramids 3. The cranial nerves involved in your roommate’s disorder: a. III, IV, and VI IV, VI, and VII VI, VII, and VIII :1. VI, VII, and IX 4. A patient with an acute skull fracture and a rapidly deteriorating state-of-consciousness most likely has: @idural hematoma b. subdural hematoma c. aneurysm of posterior cerebral artery d. stroke X. Anatomy (1 point each) . ‘1 '_ V i x g.) 8. 31‘” *2 "or k C NM 3 ...
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2009exam2key - Name EID Quiz 2 BME 365R Nov 5 2009 I Short...

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