ExaminationofMedicalPhysiologyfor10THIMSPQ2012

1、XuZhou Medical CollegeExamination of Medical Physiology for 10TH IMSPQ 2012（Feb29,2012）ITEMTOTAL SCORESCOREPART. Single choices ( 2 point×30=60 points, Please choose the BEST answer and then fill in the answer card)1. The major physiological function of plasm colloid osmotic pressure is to A. r

2、egulate water exchange between the two sides of capillaries. B. regulate fluid equilibrium between the two sides of cells. C. maintain the normal cellular shape. D. keep the normal cubic capacity of cells. E. determine the total plasm osmotic pressure.2. During the process of excitation-contraction

3、coupling in skeletal muscle, calcium is released from the sarcoplasmic reticulum byA. Inositol triphosphate (IP3) B. Protein kinase AC. An increase in intracellular calcium concentration D. Membrane depolarizationE. An increase in intracellular sodium concentration3. In a nerve, the magnitude of the

4、 action potential overshoot is normally a function of theA. Magnitude of the stimulus B. Intracellular potassium concentrationC. Extracellular sodium concentration D. Resting membrane potentialE. Diameter of the axon4. The rate of diffusion of a particle across a membrane will increase ifA. The area

5、 of the membrane decreases B. The thickness of the membrane increasesC. The size of the particle increases D. The concentration gradient of the particle decreasesE. The lipid solubility of the particle increases5. The following diagram illustrates the relative resistance of three vessels. The ratio

6、of the flow in vessel X to the flow in vessel Y isA. 1:1 B. 3:2 C. 2:1 D. 3:1 E. 4:3 6. The data below was obtained from a patient before and after administration of a drug that increased his mean right atrial pressure.The ratio of the patients total peripheral resistance before administration of th

7、e drug to the total peripheral resistance after administration of the drug isA. 1:1 B. 3:2 C. 4:3 D. 5:4 E. 6:57. During ventricular ejection, the pressure difference smallest in magnitude is between theA. Pulmonary artery and left atrium B. Right ventricle and right atrium C. Left ventricle and aor

8、ta D. Left ventricle and left atrium E. Aorta and capillaries8. Net filtration from capillaries will increase followingA. Increased contraction of the precapillary sphincter B. Decreased arterial pressureC. Increased plasma protein concentration D. Decreased capillary permeabilityE. Increased postca

9、pillary resistance9. A deficiency of pulmonary surfactant wouldA. Decrease surface tension in the alveoli B. Decrease the change in intrapleural pressure required to achieve a given tidal volumeC. Decrease lung compliance D. Decrease the work of breathing E. Increase functional residual capacity (FR

10、C)10. Airway resistance is lowestA. During a forced expiration B. At the total lung capacity C. At the residual volume D. During vagal stimulation E. When breathing gas with low oxygen11. The principal paracrine secretion involved in the inhibitory feedback regulation of gastric acid secretion isA.

11、Gastrin B. Somatostatin C. Histamine D. 5-HT E. Acetylcholine12. Acidification of the duodenum willA. Decrease pancreatic secretion of bicarbonate B. Increase secretion of gastric acid C. Decrease gastric emptying D. Increase contraction of the gallbladder E. Increase contraction of the sphincter of

12、 Oddi13.Heat is produced in the bodyA. only when body core temperature falls below the temperature set point. B. at a constant rate. C. at a variable rate. D. during hypothermia, mainly by nonshivering thermogenesis.14.The primary function of the bones of the middle ear is toA. Amplify the sound sti

13、mulus B. Filter high-frequency sounds from the sound stimulusC. Enable the direction of a sound stimulus to be detected D. Enhance the ability to distinguish different sound frequenciesE. Protect the ear from damage15. Which one of the optic field defects listed in the following diagram is produced

14、by a pituitary gland tumor?A. A B. B C. C D. D16.Which of the following hypothalamic nuclei is responsible for controlling the normal circadian rhythm?A. Paraventricular nucleus B. Ventromedial nucleus C. Arcuate nucleus D. Lateral nucleus E. Suprachiasmatic nucleus17.Presynaptic inhibition in the c

15、entral nervous system affects the firing rate of alpha motoneurons byA. Increasing the chloride permeability of the presynaptic nerve endingB. Decreasing the potassium permeability of the alpha motoneuronC. Decreasing the frequency of action potentials by the presynaptic nerve endingD. Increasing (h

16、yperpolarizing) the membrane potential of the alpha motoneuronE. Increasing the amount of the neurotransmitter released by the presynaptic nerve ending18.During a voluntary movement, the Golgi tendon organ provides the central nervous system with information aboutA. The length of the muscle being mo

17、ved B. The velocity of the movement C. The blood flow to the muscle being movedD. The tension developed by the muscle being moved E. The change in joint angle produced by the movement19.If GFR increases, proximal tubular reabsorption of salt and water will increase by a process called glomerulotubul

18、ar balance. Contributions to this process includeA. An increase in peritubular capillary hydrostatic pressure B. A decrease in peritubular sodium concentrationC. An increase in peritubular oncotic pressure D. An increase in proximal tubular flowE. An increase in peritubular capillary flow20.Destruct

19、ion of the supraoptic nuclei of the brain will produce whichof the following changes in urinary volume and concentration? (Assume that fluid intake equals fluid loss.)A. An increased urinary volume and a very dilute urine B. An increased urinary volume and concentrated urineC. A normal urinary volum

20、e and concentration D. Decreased urinary volume and a very dilute urineE. Decreased urinary volume and a concentrated urine21.Radiation treatment for a pituitary tumor in an 8-year-old boy resulted in the complete loss of pituitary function. As a result, the child is likely to experienceA. Hyperthyr

21、oidism B. Increased ACTH C.Absent sexual maturationD.Accelerated growth spurts E. Increased TSH levels22.The secretion of ACTH is correctly described in which of the following statements?A . It shows circadian rhythm in humans B. It is decreased during periods of stressC. It is inhibited by aldoster

22、one D. It is stimulated by glucocorticoids E. It is stimulated by epinephrine23. The resting potential of a nerve membrane is primarily dependent on the concentration gradient ofA. Potassium B. Sodium C. Calcium D. Chloride E. Bicarbonate24. Which of the following words or phrases is most closely as

23、sociated with an end-plate potential at the neuromuscular junction?A. “All-or-none response” B. Depolarization C. Hyperpolarization D. Action potential E. Electrically excitable gates25. In a test subject, oxygen consumption was measured at 700 mL/min. Pulmonary artery oxygen content was 140 mL per

24、liter of blood and brachial artery oxygen content was 210 mL per liter of blood. Cardiac output was which of the following?A. 4.2 L/min B. 7.0 L/min C. 10.0 L/min D. 12.6 L/min E. 30.0 L/min26. Increasing vagal stimulation of the heart will cause an increase in A. Heart rate B. PR interval C. Ventri

25、cular contractility D. Ejection fraction E. Cardiac output27. A woman has a respiratory rate of 18, a tidal volume of 350 mL, and a dead space of 100 mL. What is her alveolar ventilation?A. 4.0 L B. 4.5 L C. 5.0 L D. 5.5 L E. 6.0 L28.Vitamin B12 is absorbed primarily in theA. Stomach B. Duodenum C.

26、Jejunum D. Ileum E. Colon29. The most important role of the gamma motoneurons is toA. Stimulate the common skeletal muscle fibers to contract B. Maintain Ia afferent activity during contraction of muscleC. Detect the strength of skeletal muscle D. Detect the length of resting skeletal muscleE. Preve

27、nt muscles from producing too much force30. Increased activity of the sympathetic nervous system causesA. Urinary bladder emptying B. Pupillary constriction C. Accommodation for near vision D. Bronchiolar dilation E. Gallbladder emptyingPART . Answer the following questions(10 points for each,total 40 points)1. Which ions content in plasm will increase for blood of long-term preservation under cold environment? Why does hemolysis tend to occur for this case? Please discuss the questions in detail. 2. Blood is flowing