What is the single most abundant chemical substance in the body?
What will be an ideal response?
water
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There are two solutions separated by a semipermeable membrane. Solution a is 0.2 M NaCl and solution b is 0.1 M CaCl2. Will there be a net flow of water across the membrane? Why or why not?
What will be an ideal response?
What does the umbilical vein carry?
A) metabolic wastes and carbon dioxide from the fetus to the placenta B) metabolic wastes and carbon dioxide from the placenta to the fetus C) oxygen and nutrients from the fetus to the placenta D) oxygen and nutrients from the placenta to the fetus E) blood from the navel into the inferior vena cava
Which combination of substances would cause the greatest stimulation of gastric HCl secretion when applied to parietal cells?
A. somatostatin, gastrin, and histamine B. acetylcholine, histamine, and somatostatin C. somatostatin and acetylcholine D. gastrin, histamine, and acetylcholine E. histamine and gastrin
Regulation of sex hormone levels is an example of negative feedback homeostatic control.
Answer the following statement true (T) or false (F)