PracticeExam3A

PracticeExam3A - BISC220 Exam 3(Version A Spring 2006...

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BISC220 – Exam 3 (Version A) Spring 2006 Herrera 1. Low levels of glucose in the plasma stimulate ___________________________ cells in the pancreas to secrete _____________________________. High levels of glucose in the plasma stimulate ______________________________ cells in the pancreas to secrete ___________________________. 2. List the hormones that are known to affect appetite in humans. For each hormone, list a) the cell, tissue, or organ that secretes the hormone, and b) the main effect of the hormone. 3. Indicate whether each of the following statements is true or false. a. In birds, blood pumped out of the right ventricle is deoxygenated. b. In fish, blood flows directly from the respiratory organ to the body without passing through the heart. c. The lumen of all blood vessels is lined with endothelial cells, except for the chambers of the heart. d. The combined cross-sectional area of all the arteries is greater than that of the capillaries. 4. Elephantiasis is a painful and disfiguring condition in which fluid-filled swellings develop in the limbs, genitalia, and other body parts. It is caused by filarial worms which lodge within and block lymph vessels and nodes. Explain where this fluid comes from, where it normally goes to prevent swelling, and the physical forces that create it. 5.
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PracticeExam3A - BISC220 Exam 3(Version A Spring 2006...

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