85) Which of the following is promoted by parasympathetic activity? A) Airway co

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85) Which of the following is promoted by parasympathetic activity? A) Airway constriction B) Ejaculation C) Pupillary dilation D) Vasoconstrictor response to hemorrhage E) Secretion of sweat 86.) A 35-year old woman experiences anterior pituitary hemorrhagic necrosis (Sheehan syndrome) after a postpartum hemorrhage. She feels light-headed, dizy, and weak. Which of the following hormones most likely is responsible for her symptoms? A) ACTH GnRH lactin D) TSH 87) A 45-year-old woman is noted to have fatigue and cold intolerance and is diagnosed with hypothyroidism. Her physician suspects a pituitary etiology. Which of the following laboratory finding is most consistent with this condition? A) Low TSH, low free thyroxine B) Elevated TSH, low thyroxine C) Elevated TSH, elevated thyroxine D) Low TRH 88.) A 33-year-old chemist takes L-thyroxine (Synthroid) 1 ug orally each day. He asks how the thyroxine work a cellular level. Which of the following is the best explanation? A) It binds onto membrane surface receptor and activates protein synthesis. B) It binds onto membrane surface receptor and activates secondary messenger.u C) It binds onto a cytoplasmic receptor and the hormone-receptor complex diffuses to the nucleus to affect transcription. D) It has a direct effect on the hypothalamic nuclei affecting metabolism 89.) A 33-year-old woman is noted by her physician to have some fatigue and some coarse skin. Her only medication is oral contraceptive agent. The following laboratories have been returned TSH 1.0mU/L (0.35-6.0mU/L) Free Thyroxine 1.0 ng/dL (0.8-2.7 ng/dL) Total thyroxine 13.0 ?dL (4.5-12.0 ?gdL) Thyroid-binding globulin (TBG) 55ng/mL (15-34mgL) Which of the following is the most likely diagnosis? A) Hyperthyroidism B) Hypothyroidism C) Normal thyroid status D) Transient hyperthyroidism

Explanation / Answer

Q.85

Answer: Option A

Explanation: Pupil constriction is Parasympathetic; pupil dilation is Sympathetic. Ejaculation is Sympathetic; whereas erection is Parasympathetic. Airway relaxation is Sympathetic; Airway constriction is Parasympathetic. Vasoconstrictor respose during hypovolemia is mediated by symphathetic activity.

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