biol252-lab-worksheet14 -answers

biol252-lab-worksheet14 -answers - n-EV'IEw SHEET NAME...

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Unformatted text preview: n-EV'IEw SHEET NAME LABTIME/DATE hxafic! E Gross Anatomy of the Brain and Cranial Nerves The Human Brain 1. In which 0 owing functional areas he found? Temporal Temporal auditory area olfactory area Frontal Occipt'm! primary motor area visual area Parietal ta! ' sensory area Broca‘s area 2. Match the letters on the diagram of the human brain {right lateral View) to the appropriate terms listed at the left: h I. frontal lobe b 2. parietal lobe j 3. temporal lobe f 4. precentral gyms C 5. parieto-occipital sulcus ‘2 6. postcentral gyms i 7. lateral sulcus i 10. medulla g 8. central sulcus d 11. occipital lobe e k 9. cerebellum 12. pens 3. Which of the following structures are not part of the brain stem? (Circle the appropriate response or reSponses.) cerebral hemispheres pens midbrain medulla 4. Complete the following statements by writing the proper word or phrase in the corresponding blank at the right. 1. gym A(n) l is an elevated ridge of cerebral tissue. Inward folds of cerebral _ tissue are called 2 or 3 . Gray matter is composed of _4_. White 2_ fi-lSme-l matter is composed of 5 . A fiber tract that provides for communication between different parts of the CNS is called a(n) 6 , whereas one that car— 3‘ WM ries impulses between the periphery and CNS areas is called a(n) 7 . N u— clei deep within the cerebral hemisphere white matter are collectively called 4' cell bodies of neurons the _3__- 5‘ fiber tracts 1 nerve-9 6‘ y 8‘ basal nuclei (ganglia) 5. Identify the structures 0n the following sagittal view of the human brain by matching the lettered areas to the proper terms at the left: P 1. cerebellum _m__,____ 2. cerebral aqueduct ‘3 3. cerebral hemisphere _f___..__ 4. cerebral peduncle h_____ 5. choroid plexus k 6. corpora quadrigemina b_,____ 7. corpus callosum __”___,___ 8. fourth ventricle d 9. hypothalamus f 10. mammillary bodies C 11. intermediate mass 9' 12. medulla oblongata ,e_____ 13. optic chiasrna j 14. pineal body 3 15. pituitary gland 0_+_F__ 16. pens i 17. thalamus 6. u. 'ng the anatomical terms from item 5, match the appropriate structures with the following des 2. ons: medflfia ' 3 “30m 1. most important autonomic center of brain corpora (Emmi-39m: -' 2. located in the midbrain; contains reflex cc ' s for vision and hearing CerEbEIIHm 3. c an dinates complex muscular -- vements medulla ONO-“8935 4. contains autu- ‘ mic v ters regulating heart rate, respiration and other visceral activities '30???” WHO-mm 5. lat 1ber tract connecting ' ~ erebral hemispheres DWI-mi“? Stand: Film?“1E "' 6. part of the endocrine system CHEW“! 09 - ct 7r“. canal that connects the third and fourth ventricles 5 ’ mm 8. the intermediate mass is part of it 84 Review Sheet 14 7. Exp a1 - r - rm to the base of the brain is often much more dangerous than trauma to the front the relative function e l t: - - lhemispheres and the brain stern structures. Meninges of the Brain 8. Identify the meningeal (or associated) structures described below: aim“ mater 1. outermost layer; tough fibrous connective tissue pm mm” 2. innermost vascular layer covering the brain; follows every convolution ammnmd Wm 3. drains cerebrospinal fluid into the venous blood in the dural sinuses Chomid flex“ 4. structure that forms the cerebrospinal fluid mammal-d mater 5. middle layer; delicate with cottony fibers fab‘ Cerebral 6. a dural fold that attaches the cerebrum t0 the crista galli of the skull Cerebrosplnal Fluid 9. Fill in the following flowchart to indicate the path of cerebrospinal fluid from its formation site (assume that this is one of the lateral ventricles) to where it is reabsorbed into the venous blood: Lateral venniclg ——_p. third ventricle —_)... cerebral aqueduct of mldbrat’n —p— fourth ventricle —y central canal ——)- via openings in the wall of the 4th ventricle Subamcmmd Space surrounding the brain and cord —--)- arachnoid villi "—"" (and central canal of the cord) dural sinuses containing venous blood 10. Label correctly the structures involved with circulation of cerebrospinal fluid on the accompanying diagram. {These struc- tures are identified by leader lines.) lateral ventricles in cerebral hemispheres third ventricle cerebral aqueduct fourth ventricle choroid plexus Review Sheet 14 85 Dissection of Sheep Brain 12. In your own words, describe the relative hardness of the sheep brain tissue as noticed when you were cutting into it. The sheep brain tissue is fairly sofi. Because formalin hardens all tissue, what conclusions might you draw about the relative hardness and texture of living brain tissues The human brain is a reianveiy soft tissae. 13. How does the relative size of the cerebral hemispheres compare in sheep and human brains? The cerebral hemispheres in human brains are larger. What is the Significance of this difference? Hamans have a more develoPed area for speech, language, conscious thoaght. interpretation, and other functions associated with the cerebrarn. 14. What is the significance of the fact that the olfactory bulbs are much larger in the sheep brain than in the human brain? The sense of smeit is more important as a protective and food-getting sense in sheep. Fleview Sheet 14 87 ...
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biol252-lab-worksheet14 -answers - n-EV'IEw SHEET NAME...

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