A&P_Fall2006_Exam3_p3 - 15 The intrinsic rate of...

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Unformatted text preview: 15. The intrinsic rate of prepotentials generated by the pacemaker cells Is reduced by V fibers which release a. parasympathetic ; epinephrine c. sympathetic ; acetylcholine (by) parasympathetic ; acetylcholine d. sympathetic ; epinephrine 16. The hormone that causes milk letdown can be found in Herring bodies: 6) true b. false 17. The biconcave-disc shape of RBCs does all of the following EXCEPT: a. provides more surface area for gas (9.") increases the hemoglobin storage exchange capacity b. allows these cells to fold up in d. permits rouleaux formation microcapillaries 18. Grave’s disease can lead to all of the following EXCEPT: a. agoiter ((3 increased TRH plasma levels b. increased thyroglobulin production d. hyperthyroidism 19. Potassium ion has an electrochemical gradient favoring its exit from the cell: [9 true b. false 5,7 20. The releasing and inhibiting hormones secreted from the neurosecretory cells of the hypothalamus exit the hypophyseal portal system from the. / ‘ / (a) capillary plexus in the pars distalis c. secondary capillary plexus in the K“ neurohypophysis b; portal veins in the infundibulum d. primary capillary plexus in the median eminence 21. All of the following contain deoxyhemoglobin EXCEPT: @ pulmonary veins c. the chamber of the heart below the tricuspid valve b. the right auricle d. the pulmonic trunk 22. The autonomic nervous system is composed of neurons that propagate their information Q) multipolar ; efferently c. unipolar ; efferently b. multipolar ; afferently d. unipolar ; afferently ...
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