生理学练习题(二)（Exercises for Physiology (two)）.doc

生理学练习题(二)（Exercises for Physiology (two)） Type [A1 questions] Each of the following questions below are A, B, C, D, E 5 answers, please choose the best answer from, and the corresponding letter on the answer sheet to the corresponding question number belongs to black box. 1. the concentration of extracellular Na+ in normal cells was about Na+ A.L times B.5 times C.12 times D.18 times E.21 times 2., the relation between stimulus intensity and stimulus time is When the A. stimulation intensity is less than the basal intensity, the stimulation time can cause the tissue to be excited When the B. stimulus intensity is equal to the basal intensity, the stimulation time is shortened and the tissue excitability is stimulated When the C. stimulus time is equal to the value of the time, the intensity of the stimulus is the basis for tissue excitability When the D. stimulation time is less than the value of the time, no matter how large the stimulus intensity is, the tissue excitability can not be aroused No more than E. 3. when the tissue is excited and should be in absolute refractory period, its excitability is A. zero B. infinity C. is greater than normal D. is less than normal E. equals normal 4. the magnitude of the resting potential is close to that of the A. sodium equilibrium potential B. potassium equilibrium potential The sum of C. sodium equilibrium potential and potassium equilibrium potential Difference between D. sodium equilibrium potential and potassium equilibrium potential The difference between E. spike and shoot 5. stimulate the single nerve fiber with the intracellular electrode to stimulate the intensity of its current direction A. introversion B. extrovert C. is fast alternating inside and outside D., both internal and outward currents are available E. internal and external currents are equal 6. when the motor nerve is excited, the amount of the ion entering the axon end is orthogonal to the release of vesicle A.Ca2+ B.Mg2+ C.Na+ D.K+ E.Cl- 7. the basic