Property:AnswerCExp
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While the ulnar nerve originates from the C8-T1 nerve roots, the ulnar nerve itself is not damaged in Klumpke palsy. A lesion of the ulnar nerve can be caused by a fracture of the medial epicondyle of the humerus, giving rise to the “ulnar claw”. In this condition, the fourth and fifth digits flex when attempting to open the hand. +
Hypersensitivity type III disorders include conditions where an antigen-antibody complex forms and activates the complement system. Hashimoto's disease is not a type III hypersensitivity disorder. +
Hypersensitivity type III disorders include conditions where an antigen-antibody complex forms and activates the complement system. A PPD skin test is not a type III hypersensitivity immune reaction. +
The C8-T1 nerve roots give rise to the inferior trunk of the brachial plexus. These nerves are injured in Krumpke’s palsy. +
The deltoid muscle is responsible for arm abduction beyond 15 degrees. The deltoid is innervated by the axillary nerve, which is typically affected by fractures at the surgical neck of the humerus. +
The flexor digitorum superficialis flexes the middle phalanges at the proximal interphalangeal joints. The flexor pollicis longus flexes the thumb. The median nerve does not traverse between these 2 muscle groups. +
This mechanism of action corresponds to amiodarone, the drug most likely to be causing this patient's symptoms. +
Given this patient's high insulin levels and low C-peptide, exogenous administration of insulin is the most likely etiology. +
The ratio of free/total PSA in patients with prostate cancer is lower than those with BPH. Prostate cancer increases total PSA more than free PSA. +
Clindamycin and macrolides both inhibit protein synthesis by binding to the 50S ribosomal subunit. Tetracyclines do not bind to the 50S subunit. +
Transfusion ABO incompatibility is relatively uncommon, but still occurs due to medical errors. Hemolytic transfusion reactions due to ABO mismatch are caused by host antibodies against the main (A/B) antigens on donor RBCs. +
Exemestane acts as an aromatase inhibitor to decrease peripheral estrogen production. It is used in the treatment of estrogen receptor-positive breast cancer and cannot be used to treat androgenetic alopecia. +
"C" corresponds to the ascending loop of Henle. This is not the location where PTH acts to increase the reabsorption of calcium. +
During the determination/preparation stage, individuals show a commitment to making necessary changes, with a clear plan in mind. However, these individuals have not made any changes yet. +
Bipolar disorder classically presents with alternating symptoms of depression and episodes of mania. Manic episodes are usually described as significant distractibility, irresponsibility, hedonistic behavior, grandiosity, racing thoughts, psychomotor agitation, insomnia, and talkativeness or pressured speech. +
These changes correspond to the effects of afferent arteriolar constriction. This effect may be seen with NSAID intake. +