In the process of digestion, most nutrient absorption takes place in the
A) small intestine.
B) stomach.
C) large intestine.
D) duodenum.
E) liver.
Answer: A
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Fill in the blank(s) with the appropriate word(s).
________ are glial cells that are macrophages.
Fill in the blank(s) with the appropriate word(s).
Mature erythrocytes
A. have a centrally located nucleus. B. are actually just cellular fragments. C. contain hemoglobin in their cytoplasm. D. mature from cells called megakaryocytes. E. do not contain protein.
In the centrifuged sample of blood illustrated, which number indicates the layer containing water, plasma proteins, nutrients, and waste products?
A. 1 B. 2 C. 3 D. None of the numbers indicate that component of blood.