Dr O'Quin Notes 4/4
Dr O'Quin Notes 4/4 Bio 152
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This 3 page Class Notes was uploaded by Alena Comley on Friday April 15, 2016. The Class Notes belongs to Bio 152 at University of Kentucky taught by Dr. O'Quin in Spring 2016. Since its upload, it has received 9 views. For similar materials see Introductory Biology II in Biology at University of Kentucky.
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Date Created: 04/15/16
The colon contains symbiotic microorganisms that digest cellulose In some herbivores, the cecum is a blind sac of the large intestine that contains symbiotic bacteria and protists that ferment cellulose In humans, a narrow pouch called the appendix emerges from the cecum Rabbits and some other species with a cecum are able to excrete the cecum's contents as pellets They re-ingest these to absorb more nutrients from the food- what is known as copropaghy CLICKER #1 What is the primary function of the large intestine? A. Absorb water B. Absorb nutrients C. Both A and B D. None of the above ANSWER: A Digestive homeostasis Diabetes mellitus-a diseases where people experience abnormally high levels of glucose in their blood Insulin is secreted by the pancreas when blood glucose levels are high As a result, the glucose gets taken up by the liver and muscles- glucose levels drop If blood glucose is low, the pancreas secretes glucagon, which causes the release of glucose This is a negative feedback system to control glucose concentrations in the blood CLICKER #2 The hormone ___________ secreted by the_________ causes the uptake of glucose. A. Glucagon; liver B. Insulin; pancreas C. Glucagon; Pancreas D. Insulin; liver ANSWER: B There are two types of diabetes: type 1 and type 2 Type 1-people with this do not synthesize sufficient insulin o Actually an autoimmune disease where the insulin- producing cells of the pancreas are destroyed o Treated with insulin injections and attention to diet Type 2- people with this are resistant to insulin, meaning that insulin does not effectively activate its receptor in target cells This results from insulin receptors no longer functioning correctly or they are reduced in number, with obesity being the primary factor for development o Treated through diet, exercise, maintaining blood glucose levels, and by drugs that increase cellular responsiveness to insulin CLICKER #3 Which form of diabetes is actually an autoimmune disease? A. Diabetes type 1 B. Diabetes type 2 C. Both A and B ANSWER : A There is an epidemic of type 2 diabetes that is currently occurring In 2011, a total of 11% of U.S. adults aged 20 and over were diabetic Researchers have identified 38 alleles at different genes that predispose individuals to type 2 diabetes We can examine different populations to examine how environmental conditions play a role in the prevalence of type 2 diabetes Pima Indians-found in 2 populations, one in Southwest Arizona and the other in Mexico The U.S. population has a high rate of type 2 diabetes The incidence rate is tightly correlated with obesity Studies have shown that this is due to differences in the amount of physical activity between the two groups
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