The sites of gas exchange within the lungs are the
A) bronchioles.
B) terminal bronchioles.
C) pleural spaces.
D) alveoli.
E) falciform ligaments.
Answer: D
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Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.
A) insulin, because insulin is a small peptide B) steroid hormones, because both diffuse easily into target cells C) growth hormone, because the thyroid works synergistically with thyroid hormone D) glucagon, because the structure of glucagon is similar to that of thyroid hormone
In which phase of the cell cycle does a cell spend most of its time?
a. interphase b. anaphase c. prophase d. telophase
Urine is carried to the exterior of the body by the
A) lymphoids. B) urachus. C) urethra. D) circulatory system. E) ureter
If you hug yourself to keep warm, your shoulders are __________.
A. pronated B. protracted C. supinated D. retracted E. extended