Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Textbook Question
Chapter 1.1, Problem 2CYU
The nutrient-absorbing intestinal cells have a multitude of finger like projections in contact with the digested food (see Figure 16-20, p. 602). Based on your knowledge of structure— function relationships, explain the functional advantage of this structural feature. (Answers are in Appendix C.)
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All the structures of the alimentary canal have 4 similar major histological tissues . Which of the following descriptions of the tissue layers contains innacurate information?
A) The mucosa layer consits of a simple epithelium (responsible for absoprtion), a lamina proprioa (supports the epithelium) and muscularis mucosae (thats ivolved with peristalsis.
B) The muscularis externa has 2 or 3 layers of smooth msulce and is involced with persistalsis
C) The submucosa layer is a connective tissue layer that anchors the mucosa layer and contains many blood vessels, lyphatic vessels, and nerves
D) The serosa layer is a connective tissue layer that tethers the alimnetary canal to the appropirate body cavitities.
I believe that D is false but I am not certain
When the duodenu is actively digesting food, the Sphincter of Oddi released both bile and pancreatic juice into the duodenum
Between meals, when the Sphincter of Oddi is closed, an accessory pancreatic duct remains open, allowing a slow but continual flow of pancreatic juice into the duodenum between meals
WHy must there be pancreatic juice in the duodenum even if no food is currently being digested?
A- Even if there isnt chyme in the duodenum, stomahc acid might leak into the duodenum. the trypsin in pancreatic juice neutralizes that
B- We eat a lot, so we're always digesting food in the duodenum
C - the process of fat breakdown is slow, so lipids could stay in the duodenum for over a day, so we need a steady supply of pancreatic lipase.
D- Even if there isn't chyme in the duodenum, stomach acid might leak into the duodenum. The bicarbonate in pancreatic juice neutralizes that
Mr. Johnson has a gallstone (a stone) that completely obstructs the normal flow of bile and pancreatic juice into the duodenum. Explain how the digestion of carbohydrates (polysaccharides and disaccharides), lipids (triglycerides), proteins, and nucleic acids would be affected throughout the digestive tract, starting in the mouth and ending in the microvilli of the cells in the small intestine. Make one paragraph per molecule.
Chapter 1 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
Ch. 1.1 - Define physiology.Ch. 1.1 - The nutrient-absorbing intestinal cells have a...Ch. 1.2 - Prob. 1CYUCh. 1.2 - Prob. 2CYUCh. 1.2 - Prob. 3CYUCh. 1.3 - Distinguish among external environment, internal...Ch. 1.3 - Prob. 2CYUCh. 1.3 - Prob. 3CYUCh. 1.4 - Prob. 1CYUCh. 1.4 - Prob. 2CYU
Ch. 1.4 - Draw a row diagram showing the relationships among...Ch. 1 - Which of the following activities is not carried...Ch. 1 - Prob. 2RECh. 1 - Which of the following is not a type of connective...Ch. 1 - The term tissue can apply either to one of the...Ch. 1 - Cells in a multicellular organism have specialized...Ch. 1 - Cell specializations are usually a modification or...Ch. 1 - The four primary types of tissue are...Ch. 1 - Prob. 8RECh. 1 - Prob. 9RECh. 1 - _________ controls are inherent to an organ,...Ch. 1 - Prob. 11RECh. 1 - Compare physiology and anatomy.Ch. 1 - Prob. 2UCCh. 1 - Prob. 3UCCh. 1 - Prob. 4UCCh. 1 - What factors must be homeostatically maintained,...Ch. 1 - Prob. 6UCCh. 1 - Prob. 7UCCh. 1 - Prob. 1ACRCh. 1 - Prob. 1TAHLCh. 1 - Prob. 2TAHLCh. 1 - The hormone insulin enhances the transport of...Ch. 1 - Prob. 4TAHLCh. 1 - Prob. 5TAHL
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