ingestion‚ secretion‚ mixing and movement‚ digestion‚ absorption and excretion. The mouth is the first stage of the gastrointestinal tract and is arranged with numerous structures that aid in the digestion of food. These include the tongue‚ teeth‚ and salivary glands and begin the first processes of digestion. The teeth are living structures and contain blood vessels and nerves. They are the process by which we chew food in preparation for swallowing. By chewing you allow enzymes and lubricants to release
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the liquid.) Tube Solution Gas Volume in ml after: 20 min. 40 min. 60 min. 1 10% glucose + yeast 2 1% starch + yeast 3 1% starch + yeast + amylase What gas accumulated in the calibrated portion of the fermentation tube? What metabolic pathway is utilized by yeast cells? Why was amylase added to the third test tube? Did respiration occur in the beaker containing yeast and starch? Why? III. Aerobic Respiration Define the following terms:
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blue-black color indicates that starch is no longer present in the medium. Bacteria which show a clear zone around the growth produce the exoenzyme amylase which cleaves the starch into di- and monosaccharide’s. These simpler sugars can then be transported into the cell to be catabolized. Bacillus species are known to produce the exoenzyme‚ amylase. In our experiment‚ we concluded that Bacillus cereus from soil can hydrolyze starch in order to use these starches as a carbon source and use it. But
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chewing surfaces. 4 on the top and 4 on the bottom. Shaped for grinding food. The Process of Digestion: The process starts at the mouth. Food is partly broken down by the process of chewing and by the chemical action of salivary enzymes (these enzymes are produced by the salivary glands and break down starch into smaller molecules). The tongue
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that spreads malaria. When female anopheles mosquitoes‚ which prefer to feed in the night‚ bite an infected human‚ the parasites in ingested by the mosquito and in the process becomes infected with plasmodium sporozoites which are carried in the salivary glands of the mosquito. After the mosquito is infected‚ the gametocytes present in the human blood as at the time of biting and which have found its way into the mosquito’s intestine dissociates into male and female gametes. These gametes later
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impulse to visual association area. Speech association area A 1m 1m 1m 1m 1m 1m 1m Endocrine glands produce hormones which diffuse directly into the blood. Exocrine glands release their secretions through ducts. For example‚ salivary glands secrete saliva through salivary ducts into the mouth while pancreas secretes insulin directly into the blood. Structured questions (p. 16-30) 9 HKCEE Biology 2006 I Q3 © Oxford University Press 2009 New Senior Secondary Mastering Biology Suggested
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There was a time in the United States that mumps was a rather common disease. In the time before a vaccine was developed to help prevent the disease‚ there were hundreds of thousands of cases reported every year. Mumps is a contagious disease caused by the paramyxovirus which is part of the Rubulavirus family. According to the CDC‚ the virus has an average incubation period of about sixteen to eighteen days (CDC‚ 2016). Some people that get the mumps show either very mild or no symptoms and are not
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Observation of Digestive and Circulatory System Introduction/Background: This week’s lab is about digestion and the circulatory system. Students will be learning about the different types of digestion and circulatory systems for different types of animals. Students will learn not only about the mechanical and chemical components of digestion‚ but also the complete and incomplete digestions. The lab will also teach the open and closed‚ single and double‚ circulation patterns. Several different models
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specimen is negative for tuberculosis. If the effusion is due to the patient’s history of cirrhosis‚ which of the following would be most consistent with this patient’s condition? A. Pleural pH of 7.2 B. Pleural glucose of 110 mg/dL C. Pleural amylase of 200 IU/L D. Pleural protein level of 2.9 g/dL E. Pleural LDH of 150 U/L Answer Choice "B"
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mononucleosis) and other nasty diseases. How does the virus work? The Epstein-Barr virus appears capable of infecting only two major cell types: the outer (epithelial) cells of the salivary gland‚ and white blood cells known as B lymphocytes (B-cells). Infection with the Epstein-Barr virus develops first in the salivary gland. Large amounts of the virus are released in the saliva‚ enabling it to spread from one person to another. How mono is spread Epstein-Barr virus (EBV) can be found in saliva
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