PracticeMidterm-Answers_000FA07

PracticeMidterm-Answers_000FA07 - 1) In a system with...

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1) In a system with double circulation, A. blood is usually pumped at two separate locations as it circulates through the body. B. there is a countercurrent exchange in the gills. C. hemolymph circulates both through a pumping blood vessel and through body sinuses. D. blood is pumped to the gas-exchange organ and returning blood is then pumped through systemic vessels. E. there are always two ventricles and often two atria. 2) In the human digestive system, which is the site of water and ion reabsorption? A. the stomach B. duodenum C. liver D. large intestine E. gall bladder 3) Which of the following is not true about helper T cells? A. They function in both cell-mediated and humoral immune responses. B. They recognize polysaccharide fragments presented by class II MHC molecules. C. They bear surface CD4 molecules. D. They are subject to infection by HIV. E. When activated, they secrete cytokines. 4) Some nutrients are considered "essential" in the diets of certain animals because
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This note was uploaded on 03/22/2009 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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PracticeMidterm-Answers_000FA07 - 1) In a system with...

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