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20200422 F2 IS - Ch.10 - HW (Part A)

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20200422 F2 IS - Ch.10 - HW (Part A) 20200422 F2 IS - Ch.10 - HW (Part A)

Ch.10 Force & Motion 一齊做功课

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Human Digestive System for Testing The Video System Human Digestive System for Testing The Video System

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Structure Of The Stomach - Functions Of The Stomach - How Does The Stomach Work Structure Of The Stomach - Functions Of The Stomach - How Does The Stomach Work

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S3 IS Exp Amylase S3 IS Exp Amylase

S3 IS Exp Amylase

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S3 IS Expt Protease S3 IS Expt Protease

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S1 IS 植物分類 S1 IS 植物分類

S1 IS 植物分類

S1 IS 脊椎動物分類 S1 IS 脊椎動物分類

S1 IS 脊椎動物分類

S1 IS 動物分類 S1 IS 動物分類

S1 IS 動物分類

S1 IS 檢索表 S1 IS 檢索表

S1 IS 檢索表

Note P.4-5 Note P.4-5

Note P.4-5

How to use schoology How to use schoology

How to use schoology

LeeYu F1 IS 3.3生物與生境 LeeYu F1 IS 3.3生物與生境

LeeYu F1 IS 3.3生物與生境

3.4 生物多樣性 3.4 生物多樣性

3.4 生物多樣性

3.6保育 3.6保育

3.6保育

3.5生物多樣性減少 3.5生物多樣性減少

3.5生物多樣性減少

LEE YU S1 Ch6.1C LEE YU S1 Ch6.1C

LEE YU S1 Ch6.1C

LEE YU S1 Ch6.1AB LEE YU S1 Ch6.1AB

LEE YU S1 Ch6.1AB

LEEYU F1 6.2A LEEYU F1 6.2A

LEEYU F1 6.2A

LEE YU F1 Ch6.2B LEE YU F1 Ch6.2B

LEE YU F1 Ch6.2B

LEE YU F1 Ch6.4B LEE YU F1 Ch6.4B

LEE YU F1 Ch6.4B

LEE YU F1 Ch6.4A LEE YU F1 Ch6.4A

LEE YU F1 Ch6.4A

Human Digestive System for Testing The Video System

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Structure Of The Stomach - Functions Of The Stomach - How Does The Stomach Work

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In this video we discuss the structure of the stomach and the functions of the stomach. We cover the sections of the stomach and the different cells that make up the gastric pits in the stomach. Transcript/notes Stomach Your stomach is an organ that has many important roles in bodily functions. The stomach is like a holding sack as between 3 to 4 liters of food and drink enters it daily. These items typically spend 2 to 6 hours there before being passed on to the small intestine. The stomach is a J shaped organ located in the abdomen. When you chew food, then swallow it, it enters your esophagus, which connects with and passes the food to your stomach. The stomach is typically divided into 4 sections. The Cardia is the entryway to the stomach, near where the stomach and esophagus meet. The Fundus is the dome shaped region located above and to the left of where the stomach and esophagus meet. The body is the largest region of the stomach and it extends to the 4th section of the stomach, the pylorus. The pylorus is a funnel shaped region that connects the stomach to the duodenum of the small intestine. The inner lining of the stomach has a rough appearance made by gastric folds. These gastric folds have gastric pits which contain gastric glands. These glands secrete most of the gastric juice released in the stomach and this juice is a mucous fluid that contains mainly digestive enzymes and hydrochloric acid. There are 5 types of secretory cells that are located in the gastric epithelium. Surface mucous cells line the inner stomach and extend into the gastric pits and they secrete an alkaline fluid containing mucin that helps protect the stomach lining from exposure to the high acidity of gastric juices and gastric enzymes. Mucous neck cells are located deeper than the surface cells and they secrete an acidic mucin and which helps to maintain acidic conditions. Parietal cells produce hydrochloric acid and intrinsic factor. Intrinsic factor binds to vitamin B12 molecules and protects them from digestive juices until they reach the small intestine. Hydrochloric acid is not actually produced in the cells, as it forms form positive hydrogen ions and negative chlorine ions secreted from the cells. Hydrochloric acid is responsible for the low pH level in the stomach. Hcl is important in enzyme activation, unfolding certain proteins and it also protects against many microorganisms. Chief cells produce pepsinogen, which is the precursor to the enzyme pepsin. Pepsin is activated by hydrochloric acid in the stomach, and it digests or breaks down proteins into smaller peptide fragments. Chief cells also produce gastric lipase which is an enzyme that aids in the digestion of fats. G cells release gastrin into blood, which stimulates the production of hydrochloric acid and pepsinogen, ensuring that there are enough digestive enzymes when food is present in the stomach. The outer stomach wall is comprised of 3 layers of smooth muscle tissue, an oblique muscle layer, a circular muscle layer, and a longitudinal layer, with a serosa being the outermost layer. The stomach has several important functions in your body, as it serves as a food reservoir, storing food until it can be moved into the small intestine. As we have covered, it releases gastric juice, which contains enzymes that take part in the digestion of food. The stomach actually churns food, breaking it down into smaller particles and mixing them with the gastric juice. It secretes intrinsic factor, which protects vitamin B12 molecules, which are important in cell metabolism. The stomach absorbs some alcohol, aspirin, and some short chain fatty acids. And the stomach produces gastrin to help regulate digestive functions.

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S3 IS Exp Amylase

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S3 IS Exp Amylase

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S3 IS Expt Protease

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S3 IS Expt Protease

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S1 IS 植物分類

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S1 IS 植物分類

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S1 IS 脊椎動物分類

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S1 IS 脊椎動物分類

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S1 IS 動物分類

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S1 IS 動物分類

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S1 IS 檢索表

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S1 IS 檢索表

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Note P.4-5

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Note P.4-5

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How to use schoology

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How to use schoology

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LeeYu F1 IS 3.3生物與生境

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LeeYu F1 IS 3.3生物與生境

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3.4 生物多樣性

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3.4 生物多樣性

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3.6保育

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3.6保育

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3.5生物多樣性減少

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3.5生物多樣性減少

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LEE YU S1 Ch6.1C

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LEE YU S1 Ch6.1C

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LEE YU S1 Ch6.1AB

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LEE YU S1 Ch6.1AB

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LEEYU F1 6.2A

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LEEYU F1 6.2A

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LEE YU F1 Ch6.2B

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LEE YU F1 Ch6.2B

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LEE YU F1 Ch6.4B

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LEE YU F1 Ch6.4A

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(New) Experiment 4.1 Using a microscope

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F2 IS 8.6 Series circuit and parallel circuit(part 3) F2 IS 8.6 Series circuit and parallel circuit(part 3)

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(NEW) Experiment 5.9 Absorption of radiation by different surfaces

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(NEW) Experiment 5.7 Studying the conduction of heat in a liquid and a gas

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1A IS Unit 5 Section 5.3 Section A Part 1

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1A IS Unit 5 Section 5.2 Section A Part 2

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1A IS Unit 5 Section 5.1 Part 2

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1A IS Unit 5 Section 5.1 Part 1

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【減塑行動。拯救海洋】海洋生物偵查庭-7 減少塑膠用品,海洋好朋友謝謝你

這裡是宇宙裡最美麗的星球,地球。湛藍美麗的大海,你們看是不是很美?但仔細看看海裡面是什麼?通通都是塑膠垃圾!垃圾在海面上飄,它的面積有535個臺灣大,而且還一直在增加中,很多海洋生物好朋友們都因此受害了!我是小鯨魚小梧子,減少塑膠用品我和我的海洋好朋友謝謝你!

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MAN

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Animation created in Flash and After Effects looking at mans relationship with the natural world. Music: In the Hall of the Mountain King by Edvard Grieg. "Hall of the Mountain King" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ https://www.facebook.com/SteveCuttsArt https://twitter.com/Steve_Cutts http://www.stevecutts.com Copyright © 2012 www.stevecutts.com

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