The salivary enzyme amylase functions to begin digestion of 1) carbohydrates. 2) proteins. 3) fats. 4) All of these are correct.
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Step 1: Amylase is a digestive enzyme that breaks down carbohydrates. Show more…
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Which of the following enzymes is matched to its correct nutrient? a. amylase- starch b. lipase- -fats and lipids c. protease- proteins d. All of these are correct.
1. Carbohydrate digestion begins in the: a. Mouth b. Small intestine c. Stomach d. Ileum e. Salivary gland 2. The enzyme salivary amylase helps to digest: a. Proteins b. Complex carbohydrates c. Simple sugars d. Lipids e. Nucleic acids 3. The main functions of the large intestine include: a. Chemical digestion of chyme b. Temporary food storage c. Resorption of water and electrolytes d. Absorption of the products of digestion e. All of the above 4. The oxygen debt as a result of exercise is caused by: a. The amount of oxygen needed to convert lactic acid to glucose b. The amount of oxygen needed to rebuild the supply of ATP c. The reoxygenation of hemoglobin d. The reoxygenation of myoglobin e. All of the above 5. Functions of the stomach include: a. Storage of ingested food b. Initiation of protein digestion c. Some absorption d. There is some digestion of food e. All of the above
Sri K.
PRE-LAB Assignments To maximize learning, BEFORE your lab period, carefully read all assigned activities and the corresponding background information. Then, complete the pre-lab assignments below for each of the assigned activities. PRE-LAB Activity 1: Analyzing Amylase Activity 1. Benedict's reagent tests for the presence of 2. Lugol's iodine solution tests for the presence of 3. In the mouth, salivary amylase hydrolyzes ________ into oligosaccharides. 4. In this activity, you will test the effect of ________ on amylase activity. PRE-LAB Activity 2: Analyzing Pepsin Activity 1. The building blocks of proteins are 2. Which reagent will be used to test for the products of protein digestion? 3. The chemical digestion of proteins begins in the 4. Inactive pepsinogen is converted to pepsin by PRE-LAB Activity 3: Analyzing Lipase Activity 1. What is litmus cream? 2. The building blocks of triglycerides (neutral fats) are ________ and ________. 3. Before lipids are hydrolyzed by lipase, they are emulsified by 4. Most lipase is secreted by which accessory organ of the digestive tract? PRE-LAB Activity 4: Tracing Digestive Pathways 1. Wavelike, rhythmic contractions called ________ propel food through the pharynx and into the esophagus. 2. The slurry mix of partially digested food and gastric juices is called 3. Bile is produced by the ________ and stored in the ________. 4. Newly formed fats enter specialized lymphatic capillaries called ________ associated with the villi of the small intestine and are transported to venous circulation by lymphatic vessels. The Mechanical and Chemical Events of Digestion Figure 28-1 summarizes the processes involved in the mechanical and chemical digestion of food so that nutrients can be absorbed by the body. Mechanical digestion is a physical process that increases the surface area of ingested food and prepares it for chemical digestion by enzymes. The chewing of food in the mouth and the churning of food in the stomach are examples of the mechanical breakdown of food. Chemical digestion, by contrast, involves the action of hydrolytic enzymes that chemically break down macromolecules (carbohydrates, proteins, lipids, and nucleic acids) into their respective building blocks. Table 28-1 summarizes the types of macromolecules, their building blocks, and examples of enzymes that break down each type of macromolecule.
Adi S.
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