{"id":104,"date":"2017-04-08T04:02:23","date_gmt":"2017-04-08T04:02:23","guid":{"rendered":"https:\/\/imgmedicaldoctor.com\/?p=104"},"modified":"2017-12-18T05:18:15","modified_gmt":"2017-12-18T05:18:15","slug":"pharmacology-questions-3-for-usmle-mccee-plab-fcps-pdmcmrcp","status":"publish","type":"post","link":"https:\/\/imgmedicaldoctor.com\/?p=104","title":{"rendered":"Pharmacology Questions (3) for USMLE, MCCEE, PLAB, FCPS, PDMC,MRCP&#8230;&#8230;&#8230;"},"content":{"rendered":"<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- shorter link --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: inline-block; width: 468px; height: 15px;\" data-ad-client=\"ca-pub-2708967997486115\" data-ad-slot=\"2174551186\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<p>A 23-year-old woman represents to her physician with ptosis, meiosis and anhidrosis in the left eye.<\/p>\n<p>Which one of the following drugs is used to determine whether this lesion is preganglionic or postganglionic?<\/p>\n<p>A-Albuterol<\/p>\n<p>B-Atenolol<\/p>\n<p>C-Cocaine<\/p>\n<p>D-Epinephrine<\/p>\n<p>E-Phenylephrine<\/p>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- USMLE Responsive --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-2708967997486115\" data-ad-slot=\"2268670784\" data-ad-format=\"auto\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<p>Answer:<\/p>\n<p>This is a typical case of Horner\u2019s syndrome. Indirect sympathomimetic drugs such as cocaine act on postganglionic noradrenergic neurons. Administration of cocaine causes mydriasis if the lesion preganglionic but if it has no effect if the lesion is postganglionic. Direct sympathomimetic drugs such as epinephrine and phenylephrine acts on both pre- and postganglionic neurons. Beta-blockers have no effect on both neurons.<\/p>\n<p>The correct answer is C<\/p>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- responsive ad unit --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-2708967997486115\" data-ad-slot=\"7248596388\" data-ad-format=\"auto\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- shorter link --><br \/>\n<ins class=\"adsbygoogle\" style=\"display: inline-block; width: 468px; height: 15px;\" data-ad-client=\"ca-pub-2708967997486115\" data-ad-slot=\"2174551186\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A 23-year-old woman represents to her physician with ptosis, meiosis and anhidrosis in the left eye. Which one of the following drugs is used to determine whether this lesion is preganglionic or postganglionic? A-Albuterol B-Atenolol C-Cocaine D-Epinephrine E-Phenylephrine Answer: This is a typical case of Horner\u2019s syndrome. Indirect sympathomimetic drugs such as cocaine act on &#8230; <a title=\"Pharmacology Questions (3) for USMLE, MCCEE, PLAB, FCPS, PDMC,MRCP&#8230;&#8230;&#8230;\" class=\"read-more\" href=\"https:\/\/imgmedicaldoctor.com\/?p=104\" aria-label=\"Read more about Pharmacology Questions (3) for USMLE, MCCEE, PLAB, FCPS, PDMC,MRCP&#8230;&#8230;&#8230;\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[18],"class_list":["post-104","post","type-post","status-publish","format-standard","hentry","category-pharmacology","tag-pharmacology"],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/posts\/104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=104"}],"version-history":[{"count":6,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/posts\/104\/revisions"}],"predecessor-version":[{"id":223,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=\/wp\/v2\/posts\/104\/revisions\/223"}],"wp:attachment":[{"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imgmedicaldoctor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}