Physiology130EXAM_oct2002

Physiology130EXAM_oc - DIRECTIONS Each of the questions or incomplete statements below is followed by five suggested answers or completions Select

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Unformatted text preview: DIRECTIONS: Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the ONE that is BEST in each case and blacken the appropriate space on the Scantron sheet. 1. Which of the following statements about the body fluid compartments and ion concentrations is INCORRECT? A. B. Sodium is found in higher concentration in the extracellular fluid compared to the Most of the total body water (TBW) is found inside the cells intracellular fluid C. Plasma contains the least amount of the total body water (TBW) D. E. The extracellular fluid compartment is made up of the intracellular fluid There is more potassium inside the cell compared to outside compartment plus the interstitial fluid compartment Simple diffusion through the phospholipid bilayer, diffusion through a protein lined pore/ channel and facilitated diffusion all: moom> . require a protein carrier move substances down their concentration gradients . move only lipid soluble substances across the membrane . are powered by ATP show chemical specificity 3. Which of the following DOES NOT affect the rate of simple diffusion of a molecule through a protein pore? muow> macs? . The amount of ATP present for transport The number of channels in the membrane for that molecule . The charge on the molecule . The concentration gradient None of the above are correct Which of the following is an example of an active transport system? Na+ voltage gated channel K+ voltage gated channel Na+ leak channel The Na+/K+ pump Facilitated diffusion DIRECTIONS: Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the ONE that is BEST in each case and blacken the appropriate space on the Scantron sheet. Which of the following solutions has the same osmolality as 350 mM NaCl? A. 700 mM KCl B. 150 mM CaCl2 + 100 mM KCl C. 250 mM CaCl2 D. 450 mM Glucose E. 100 mM CaCl2 + 200 mM NaCl Which of the following events is principally responsible for the repolarizing phase of the action potential in a nerve cell? Diffusion of negative charge into the cell The opening of chloride (Cl—) channels The diffusion of potassium (K+) out of the cell The diffusion of calcium (Ca+ +) into the cell The diffusion of sodium (Na+) into the cell mcowe While examining the electrical and chemical properties of a nerve cell you record the following events: K+ ions are moving out of the cell Na+ ions are moving into the cell The inside of the cell is positive with respect to the outside What is occurring in this nerve cell? A. The cell has just begun to depolarize during an action potential B. The cell has almost completely repolarized during the action potential C. The cell has reached the very peak of the action potential between depolarization and repolarization. D. The cell is in the hyperpolarized phase E. The cell is at rest and is not undergoing an action potential away I u; Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the ONE that is BEST DIRECTIONS: I in each case and blacken the appropriate space on the Scantron sheet. 8. EPSP’S, IPSP’s and generator potentials may share which of the following characteristics? A. Show adaptation B. Contain refractory periods C. Are graded potentials D. Cause depolarization of the postsynaptic membrane E. Produced by changes in membrane permeability to calcium ions 9. Cerebrospinal fluid is formed in the: A. bone marrow B. sinus of bones . choroid plexus . ventricles of the brain C D E. more than one of the above is correct 10. Intemeurons may innervate: muscle spindles golgi tendon organs dorsal root ganglion neurons . sensory neurons in the spinal cord receptors WUOFU? 11. The main functions of the brainstem include: cardiovascular control respiration relaying of proprioceptive information to the thalamus memory A. B. C. D. E. A, B and C are correct ' DIRECTIONS: 12. E u 5%? m w Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the ONE that is BEST in each case and blacken the appropriate space on the Scantron sheet. The myelin sheath around central axons is formed by: WUOP‘W’ . micro glia ependymocytes astrocytes . schwann cells non of the above Cerebral lateralization applies: mvow> . for right handed people only for left handed people only to visuospatial tasks . to language to the control of facial musculature The perception of a sensation is primarily dependent on afferent impulses reaching the level of the: wuow> limbic system cerebral cortex cerebellar cortex . thalamus dorsal column nuclei Broca’s area is involved with: WUOW? memory hearing the production of speech limb movements sensory speech a be DIRECTIONS: For each of the statements below, ONE or MORE of the completions given is correct. Answer (A) if only 1 2 and 3 are correct (B) if only 1 and 3 are correct (C) if only 2 and 4 are correct (D) if only 4 is correct (E) if £1: are correct 16. Compartment A Compound B 1 M Kcl in 1 Kg ofwater 2 M NaCl in 1 Kg ofwater The two compartments above are separated by a semipermeable membrane that is permeable only to water. Once the water has stopped moving, you would expect to find: 17. 18. 1. 2. 3. 4. compartment A will have a larger volume than compartment B the concentration/osmolality of compartment A will be higher than it was before the water moved compartment A will be positive relative to compartment B compartment A will have a lower volume that compartment B Which of the following is correct concerning the absolute refractory period of an action potential in a typical nerve cell? 1. 2. 3. 4. The absolute refractory period is found in both unmyelinated and myelinated axons The absolute refractory period occurs at exactly the same time as the hyperpolarizing phase of the action potential The action potential cannot back up the axon as a direct result of the absolute refractory period The absolute refractory period is caused by inactivation of Potassium (K+) voltage gated ion channels. Which of the following about equilibrium potential is correct? 1. 2. 3. 4. The equilibrium potential for Na+ is —70 mV The equilibrium potential for C1— is the same as the resting membrane potential The equilibrium potential for Na+ is the same as the equilibrium potential for C1— The equilibrium potential for K+ is ~90 mV \ W DIRECTIONS: 19. 20. 21. 22. given is correct. Answer (A) if only 1 2 and 3 are correct (B) if only 1 and 3 are correct (C) if only 2 and 4 are correct (D) if only A is correct (E) if ALL are correct Cerebrospinal fluid compared to plasma: contains low concentrations of cholesterol has a higher pH contains very few protein contains no chloride ions i‘WP’T“ The ventrobasal complex of the thalamus: acts as relay for all sensory information to the cerebral cortex is the thalamic relay nucleus for olfaction to the limbic system relays only visual information to the occipital lobe receives inputs from the lateral and ventral spinothalamic tracts .4>‘.L”.N!—‘ SCDSOI'y receptors: 1. maybe free nerve endings are modality specific . can evoke generator potentials that may be either a depolarization or hyperpolarization 4. are often called biological transducers w?) Glycine: 1. depolarizes the postsynaptic membrane 2. increases the membrane conductance to potassium ions 3. alters the presynaptic influx of calcium ions 4. hyperpolarizes the postsynaptic membrane For each of the statements below, ONE or MORE of the completion r-r’r Away v u. DIRECTIONS: For each of the statements below, ONE or MORE of the completion: given is correct. Answer (A) if only 1 2 and 3 are correct (B) if only 1 and 3 are correct (C) if only 2 and 4 are correct (D) if only 4 is correct (E) if ALL are correct 23. The generator (receptor) potential amplitude can be altered by: the duration of the stimulus the rate of application of the stimulus the intensity of the stimulus the frequency of action potentials :“P’Nt‘ ¢ 7 24. The localization;be a syfiulus err/the body can/lie accomplisliéd by: .' f /. ED 1. temporalSSiimmat/ion 5.! 2. lateral inhibition / / t / / 3. spatial Isu 21/ ion , If . . . . J . actlvigion 0 small rec/ytptwe fields . i" 25. The primary somotosensory cortex in the human: 1. is somatotopically organized 2. receives information from the ventrobasal complex of the thalamus 3. is located on the postcentral gyrus 4. has its greatest representation in the left hemisphere 26. Presynaptic inhibition occuring at the terminal of a sensory neuron is associated with : 1. depolarization of the presynaptic terminal 2. increase in conductance of sodium ions 3. decreased calcium entry into the presynaptic terminal 4. increased transmitter release to an action potential 27. The functions of the cerebellum include: 1. equilibrium 2. processing of Visual information 3. motor co—ordination 4. generation of command signals for movement DIRECTIONS: 28. 29. 30. AMEU/U For each of the statements below, ONE or MORE of the completion given is correct. Answer (A) if only 1, 2 and 3 are correct (B) if only 1 and 3 are correct (C) if only 2 and 4 are correct (D) if only 4 is correct (E) if Ag are correct Post—tetanic potentiation: 1. is associated with increased calcium ion concentration in the presynaptic axonal terminal 2. is the result of a decrease in the frequency of action potentials reaching the presynaptic axonal terminal involves the increased release of neurotransmitter by the presynaptic terminal 4. is associated with a closure of potassium channels which results in a prolongation the action potential U) On the primary somotosensory cortex, the largest area of representation are devoted t< parts of the body that have the: 1. fewest sensory units 2. the smallest sensory units 3. largest size 4. the greatest density of sensory units If the spinal cord of a human was crushed only on the right side at the cervical (neck) spinal segment level, the following effect (s) will be seen. 1. Temperature information from the right leg will be lost 2. Touch and pressure information from the left leg will be lost 3. All sensation from the left leg would be lost 4. Proprioceptive information from the right leg will be lost ...
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This note was uploaded on 04/12/2011 for the course PHYS 2130 taught by Professor All during the Spring '11 term at UWO.

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Physiology130EXAM_oc - DIRECTIONS Each of the questions or incomplete statements below is followed by five suggested answers or completions Select

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