Which renal structure is responsible for producing hypertonic urine by reabsorbing water while allowing metabolic wastes and NaCl to pass through?
A. Glomerulus
B. Nephron loop
C. Collecting duct
D. Proximal convoluted tubule
E. Distal convoluted tubule
Answer: C
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A. complement B. interferon C. interleukin D. lysis
Scientists recently discovered a possible new route for direct exchange of materials between cells: ____
a. piggy back molecules b. tunneling nanotubes c. microcrystals d. protein carriers e. lipid bridges
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a. receives more blood than the pulmonary circulation does. b. receives blood from the left ventricle. c. is a high pressure system compared to the pulmonary circulation. d. receives blood from the left ventricle and is a high pressure system compared to the pulmonary circulation. e. all of these answers.
Upon activation, a T-lymphocyte
A. ceases dividing and becomes a memory cytotoxic helper cell. B. ceases dividing and becomes a plasma cell. C. proliferates to form clones and memory cells. D. proliferates to form B cells and plasma cells.