What is the purpose of the mucociliary escalator mechanism?
A. To dilate passageways at the superior end of the respiratory tract.
B. To move inhaled air through the rest of the respiratory tract
C. To propel contaminants towards the pharynx for removal from the respiratory tract
D. To elevate the oxygen content of the inspired air through chemical means
E. To transport gases through the mucous membrane
Answer: C
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Use the following information concerning thyroid hormone secretion to determine the best answer.Normal serum levels for T3, T4, and TSH are as follows:T390 to 230 ng/dlT45 to 13.5 mcg/dlTSH15 mIU/L?Consider the following laboratory results of thyroid function and TSH levels. T3T4TSHPatient A550 ng/dl30 mcg/dl30 mIU/LPatient B400 ng/dl20 mcg/dl10 mIU/LPatient C40 ng/dl3 mcg/dl3 mIU/LPatient D50 ng/dl3 mcg/dl30 mIU/L?Based on these laboratory results, which patient is most likely to have the following pathological condition: goiter due to iodine deficiency?
Fill in the blank(s) with the appropriate word(s).
The gallbladder contracts in response to the hormone ________.
A. gastrin B. somatostatin C. secretin D. cholecystokinin (CCK) E. insulin
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A. allow the most movement between bones. B. are found in the lower leg. C. are not found in the pelvic region. D. are common in the skull. E. unite two bones by means of fibrocartilage or hyaline cartilage.