Chemotaxis involves the chemical attraction of phagocytes to the site of an infection.
Answer the following statement true (T) or false (F)
True
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The major stimulus for the secretion of HCl during the cephalic phase of gastric regulation is ________.
A. release of histamine by ECL cells B. vagal stimulation of chief cells C. the hypothalamus D. vagal stimulation of parietal cells
At a PO2 of 70 mm Hg and normal temperature and pH, hemoglobin is ________ percent saturated with oxygen
A) 10 B) 25 C) 50 D) 75 E) more than 90
Why do marine osmoconformers use organic osmolytes in their ICF to attain osmotic balance instead of the more easily available inorganic osmolytes such as sodium, potassium and chloride ions?
a. because organic osmolytes can be easily absorbed from the sea water b. because organic osmolytes do not disrupt the function of macromolecules c. because the cells can make organic osmolytes without using cellular energy d. because the cells have to use energy to obtain inorganic osmolytes
________ differ from one another in their number of neutrons and atomic mass
A) Electrolytes B) Cations C) Anions D) Free radicals E) Isotopes