Answer the following statements true (T) or false (F)
1. Food is contained in the gastrointestinal tract from the time of ingestion until it is completely digested and the waste prepared for elimination.
2. The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than to move in a straight line, as it passes through the small intestine.
3. As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body.
4. Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCl.
5. Kupffer cells are found in the liver and are responsible for removing bacteria and worn-out cells.
1. TRUE
2. TRUE
3. TRUE
4. TRUE
5. TRUE
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A cell uses centrioles in the process of
A. RNA replication. B. protein synthesis. C. nuclear centering. D. cell division. E. energy generation.
The average glomerular filtration rate is equal to ________.
A. 8 mg/hour B. 180 L/day C. 5.5 L/min D. 100 mmHg/hour
The only kind of cell in the body that is not produced by the division of preexisting cells is
A) a gamete (sperm or egg cell). B) a neuron (nerve cell). C) an osteocyte (bone cell). D) none, because every cell is produced by the division of another cell. E) a liver cell.
Along the way, sperm journey through the __________ where they are nourished by a nutritious fluid.
Fill in the blank(s) with the appropriate word(s).