Lectus

А 42-уеаr-old woman рrеѕеntѕ wіth fасіаl аѕуmmеtrу. Yesterday, she noticed that her face appeared to be dеvіаted to the rіght. Ѕhе dеnіеѕ аnу trаumа or rесеnt trаvеl. Неr раѕt mеdісаl hіѕtorу іѕ nonсontrіbutorу. Vital signs include: blood pressure 110/78 mm Hg, temperature 36.5°C (97.8°F), pulse 78/min, and respiratory rate 11/min. Оn рhуѕісаl ехаmіnаtіon, thеrе іѕ drooріng of thе left ѕіdе of thе fасе, thе left nаѕolаbіаl fold іѕ аbѕеnt, аnd ѕhе іѕ unаblе to сloѕе hеr left еуе or wrinkle thе left ѕіdе of hеr forеhеаd. Whеn the patient is аѕkеd to ѕmіlе, thе result is shown in the photograph. The remainder of the nеurologіс ехаm іѕ normаl. No lesions are seen on the skin, mucous membranes, or ear canal. A non-contrast computed tomography (CT) scan of the head is unremarkable. Which of the following is the most likely etiology of her symptoms?
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A 28-year-old man presents to the emergency department with severe epistaxis and nasal congestion. Physical examination reveals a perforated nasal septum with surrounding mucosal inflammation and necrosis. The patient admits to regular intranasal drug use over the past 2 years. Which of the following mechanisms best explains the nasal septal damage observed in this patient?Deselect Answer

A 12-year-old boy presents to the dentist because of overcrowding of his permanent teeth and difficulty chewing. His mother reports that he sucked his thumb until age 8 and frequently breathed through his mouth due to chronic nasal congestion. Physical examination reveals a narrow, high-arched palate and protrusion of the upper incisors. Which of the following best explains the underlying mechanism responsible for this patient's malocclusion?Deselect Answer

A 68-year-old man with chronic obstructive pulmonary disease is admitted to the hospital with an acute exacerbation. His ECG shows an irregular rhythm with at least three different P-wave morphologies and a ventricular rate of 140 beats per minute, consistent with multifocal atrial tachycardia. His blood pressure is 110/70 mmHg and oxygen saturation is 88% on room air. Which of the following medications would be most appropriate for rate control in this patient?Deselect Answer

A 23-year-old man presents to a primary care provider because he complained of a few days of diarrhea, vomiting, and fever. He is diagnosed with bacterial gastroenteritis based on his stool tests. Being a microbiology student, he is aware that the epithelial linings of the gastrointestinal, respiratory, and skin act as barriers to infection, but he forgot the role of specific T cells in innate immunity. He asked the provider if he knew. Which of the following specific T cells are involved in the recognition of microbial lipids?Deselect Answer

A 65-year-old multiparous woman presents with a sensation of pelvic pressure and a visible bulge at the vaginal introitus. Physical examination reveals prolapse of the uterus and vaginal walls. The supporting structures that are compromised in this condition primarily originate from which embryologic tissue during female reproductive tract development?Deselect Answer