On a long transcontinental flight, a middle-aged man gets up and exercises in the aisle,
moving his hands, feet, arms, and legs as much as he can. He does this every two hours.
The flight attendant asks him to sit down, but he explains that he is trying to prevent a
very dangerous medical condition. He is talking about
A) deep vein thrombosis. B) leukemia.
C) aplastic anemia. D) thrombocytopenia.
A
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What type of epithelium has the appearance of a group of pillars lined up next to each other?
A. Simple cuboidal B. Simple columnar C. Simple squamous D. Transitional E. Stratified squamous
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.
Opening a chemically-gated ____________________ channel or ____________________ channel will increase the membrane potential of a plasma membrane
Fill in the blank(s) with correct word
The ________ is the functional unit of the kidney.
A. medulla B. nephron C. neuron D. calyx