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		<title>The Human Respiratory System</title>
		<link>http://advice.tutors-connect.com/463/the-human-respiratory-system/</link>
		<comments>http://advice.tutors-connect.com/463/the-human-respiratory-system/#comments</comments>
		<pubDate>Sat, 07 Nov 2009 20:23:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

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		<description><![CDATA[A. Anatomy of the Human Respiratory System
The human respiratory system is typical of all mammals.
1. Air Flow
The air first passes through the nasal passages, important for filtering, warming, and moistening the air before it enters the lungs. The nostril hairs act as initial filters. The nasal cavity is lined with a mucous membrane. This thin [...]


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		<title>AP Biology &#8211; Introduction to Lungs</title>
		<link>http://advice.tutors-connect.com/462/ap-biology-introduction-to-lungs/</link>
		<comments>http://advice.tutors-connect.com/462/ap-biology-introduction-to-lungs/#comments</comments>
		<pubDate>Fri, 06 Nov 2009 20:23:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/462/ap-biology-introduction-to-lungs/</guid>
		<description><![CDATA[A. Lungs: Adaptations for Terrestrial Vertebrates
Lungs are folded within the body and are restricted to one location. Since they are centrally located, a circulatory system must carry oxygen to all cells. Lungs contain a dense net of capillaries. Lungs consist of an inpocketing, branching tube that ends in a multitude of tiny air sacs called [...]


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		<item>
		<title>AP Biology &#8211; Trachea for Insects</title>
		<link>http://advice.tutors-connect.com/461/ap-biology-trachea-for-insects/</link>
		<comments>http://advice.tutors-connect.com/461/ap-biology-trachea-for-insects/#comments</comments>
		<pubDate>Thu, 05 Nov 2009 20:22:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
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		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

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		<description><![CDATA[Trachea: Insects
Air is a different medium than water. There is an increase in oxygen and carbon dioxide concentration, and oxygen diffuses much quicker than in water. The respiratory surface, which must be large and moist, always loses water through evaporation. A solution to this problem is to have a respiratory surface that has many folds [...]


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		<title>Gills</title>
		<link>http://advice.tutors-connect.com/460/gills/</link>
		<comments>http://advice.tutors-connect.com/460/gills/#comments</comments>
		<pubDate>Wed, 04 Nov 2009 20:21:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/460/gills/</guid>
		<description><![CDATA[A. Gills
Other organisms use a localized region of the body that is golded or branched, which enlarges the area of the respiratory surface for gas exchange. The expanded respiratory surface for aquatic animals, external and bathed, are gills. A detterent in having water as a respiratory medium is that the concentration of oxygen in the [...]


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		</item>
		<item>
		<title>AP Biology &#8211; Respiration (Introduction)</title>
		<link>http://advice.tutors-connect.com/459/ap-biology-respiration-introduction/</link>
		<comments>http://advice.tutors-connect.com/459/ap-biology-respiration-introduction/#comments</comments>
		<pubDate>Wed, 04 Nov 2009 20:20:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/459/ap-biology-respiration-introduction/</guid>
		<description><![CDATA[V. Respirtation
A. Introduction
Exchange of carbon dioxide and oxygen between an animal and the environment.
1. Animals
a. require a continuos supple of oxygen for aerobic respiration
b. must expel carbon dioxide
c. must have a wet respiratory surface
the exchange of gases requires structures with two basic charachteristics
1. Permeable surface area of sufficient size
2. moist surface area since gases cant [...]


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		<item>
		<title>Energy Content of fat, protein, and carbohydrates</title>
		<link>http://advice.tutors-connect.com/458/energy-content-of-fat-protein-and-carbohydrates/</link>
		<comments>http://advice.tutors-connect.com/458/energy-content-of-fat-protein-and-carbohydrates/#comments</comments>
		<pubDate>Tue, 03 Nov 2009 20:19:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/458/energy-content-of-fat-protein-and-carbohydrates/</guid>
		<description><![CDATA[I. Food as Fuel
The energy content of food is measured in calories
The energy content of:

Fat=9 kcal/ 1 gram
Protein= 4 kcal/1 gram 
Carbohydrates= 4 kcal/1 gram

Several processes must occur continually in higher anmals alive, for example, breathing and heart beating. The number of kcal a resting animal needs at a given time is called a basal [...]


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		<title>AP Biology &#8211; Nutrition</title>
		<link>http://advice.tutors-connect.com/457/ap-biology-nutrition/</link>
		<comments>http://advice.tutors-connect.com/457/ap-biology-nutrition/#comments</comments>
		<pubDate>Mon, 02 Nov 2009 20:18:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

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		<description><![CDATA[Nutrition
1. Carbohydrates
Carbohydrates are the most common source of energy used in cellular respiration. Blood glucose must remain constant. Glucose is stored in the muscles as glycogen and used for energy. If not used, carbohydrates are stored as fat. 
2. Fats
Unsaturated fats are necessary for cell membrane synthesis. Fats are sources of energy and insulators. Fats [...]


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		<item>
		<title>AP Biology &#8211; Chemistry of Digestion</title>
		<link>http://advice.tutors-connect.com/455/ap-biology-chemistry-of-digestion/</link>
		<comments>http://advice.tutors-connect.com/455/ap-biology-chemistry-of-digestion/#comments</comments>
		<pubDate>Sun, 01 Nov 2009 20:15:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

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		<description><![CDATA[E.Digestion in Herbivores: Ruminants
These organisms must digest cellulose. However, mammals don’t produce the necessary enzymes. In order to digest the cellulose, mammals must have large flat teeth for grinding cellulose. Cellulose must be broken down to release plant nutrients. Once broken down the food goes through the esophagus to a four chambered stomach of such [...]


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		<title>AP Biology &#8211; Intestines</title>
		<link>http://advice.tutors-connect.com/454/ap-biology-intestines/</link>
		<comments>http://advice.tutors-connect.com/454/ap-biology-intestines/#comments</comments>
		<pubDate>Sat, 31 Oct 2009 20:14:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
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		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/454/ap-biology-intestines/</guid>
		<description><![CDATA[1. Small Intestine
Food in liquid form enters the small intestine. The small intestine is about 20 feet long and is broken up into three regions, duodenum, jejunum, and ileum. It is lined with mucin and adapted for absorption of food through a highly molded inner surface. Each fold is called a villus.
a.Functions
1) Chemical digestion
2) Absorption
b. [...]


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		<item>
		<title>AP Biology &#8211; Digestive System</title>
		<link>http://advice.tutors-connect.com/453/ap-biology-digestive-system/</link>
		<comments>http://advice.tutors-connect.com/453/ap-biology-digestive-system/#comments</comments>
		<pubDate>Fri, 30 Oct 2009 20:14:13 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[AP Biology]]></category>

		<guid isPermaLink="false">http://advice.tutors-connect.com/453/ap-biology-digestive-system/</guid>
		<description><![CDATA[Digestion is the breakdown of complex food molecules into smaller components that are used by the organism. This may occur outside of the organism as in bacteria and fungi, or the organism may have extracellular digestion. Most organisms take food into cells.
Digestion is a series of chemical reactions that use hydrolytic enzymes. The chemical digestion [...]


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