The ________________________________________, which has both exocrine and endocrine functions, is an aggregation of cells near the proximal duodenum
Fill in the blank(s) with correct word
pancreas
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Select the correct statement about the physical factors influencing pulmonary ventilation.
A) A decrease in compliance causes an increase in ventilation. B) A lung that is less elastic will require less muscle action to perform adequate ventilation. C) As alveolar surface tension increases, additional muscle action will be required. D) Surfactant helps increase alveolar surface tension.
In brown adipose tissue, norepinephrine stimulates ________.
A. beta1-adrenergic receptors B. beta2-adrenergic receptors C. beta3-adrenergic receptors D. All of the choices are correct.
The trophoblast has many of the characteristics of ________ cells
A) cardiac B) cancer C) infectious D) smooth muscle E) None of the answers is correct.
Which type of muscle tissue causes contraction of the heart?
A. Cardiac muscle B. Smooth muscle C. Skeletal muscle