BIOD 151 MODULE 3 EXAM 2 WITH 100% APPROVED CORRECT ANSWERS GRADED A+ 2025

BIOD 151 MODULE 3 EXAM 2 WITH 100% APPROVED CORRECT ANSWERS GRADED A+ 2025 BIOD 151 MODULE 3 EXAM 2 2025  BIOD 151 MODULE 3 EXAM 2 WITH 100% APPROVED CORRECT ANSWERS GRADED A+ 2025 Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might develop gastric/stomach ulcers. - CORRECT ANSWERGastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts would lead to erosion of the stomach lining. Explain in detail how the stomach contents enter the small intestine - CORRECT ANSWERThe pyloric sphincter (valve), located at the base of the stomach, relaxes causing a small quantity of chyme to pass through the opening into the first part of the small intestine. This initiates a reflex that causes the muscles of the sphincter to contract and close the opening temporarily. Then the sphincter relaxes again and allows more chyme to enter. Be able to label the following: Stomach Gallbladder Jejunum (not small intestine) Appendix (not large intestine) Rectum (not large intestine - CORRECT ANSWER A patient is experiencing vitamin toxicity. What type of vitamin would be causing this toxicity? Explain your answer. A. Water soluble vitamin B. Fat soluble vitamin C. All of the above - CORRECT ANSWERFat soluble vitamins are stored within the body's fat stores making it harder for the body to rid itself of them. Explain which digestive system functions are carried out by the large intestine. - CORRECT ANSWERAbsorption: In the large intestine water and electrolytes are reabsorbed and vitamins are absorbed. Defecation: Feces travel to the rectum where it is excreted via the anus. Describe parietal cells and chief cells: name their location, secretions and purposes. - CORRECT ANSWERThe parietal cells (located in the wall of the stomach body) secrete hydrochloric acid, generating a pH of 1.3-3.5. This very acidic pH kills many of the bacteria ingested along with food. In addition, the low pH stops the activity of salivary amylase. The secretion of hydrochloric acid is essential in the activation of pepsin. Chief cells: secrete pepsinogen. Pepsinogen (a pre-enzyme) is secreted by the chief cells in the stomach. Hydrochloric acid converts the inactive pepsinogen (secreted by the chief cells) into the active enzyme pepsin which begins the breakdown of proteins Match the digestive organ with the one substance it produces: Large intestine stomach small intestine Vitamine K Secretin Trypsin Salivary amylase Pepsinogen - CORRECT ANSWERLarge intestine = vitamin K stomach = pepsinogen small intestine = secretin what is the purpose of the hormone leptin - CORRECT ANSWERdecrease hunger, increase satiety Which of the following statements is false? A. Taste buds are located on the surface of the mouth and the wall of the pharynx. B. The ileocecal valve controls the entrance of chyme into to the small intestine. C. The gall bladder, teeth, and tongue are considered accessory organs to the digestive system. D. The alimentary canal is a continuous muscular tube, open at both ends - CORRECT ANSWERB. The ileocecal valve controls the entrance of chyme into to the small intestine. (It controls the entrance to the large intestine) True/False: Lipids can be divided into three categories: saturated fat, unsaturated fat, and cholesterol. - CORRECT ANSWERTrue True/False: Anabolism combines smaller molecules to make larger molecules - CORRECT ANSWERTrue True/False: The oropharynx is the most superior region of the pharynx. - CORRECT ANSWERFalse (The nasopharynx is the most superior region) True/False: The pharynx has two types of skeletal muscle: circumferential and oblique. - CORRECT ANSWERFalse: no oblique layer True/False: The digestive work of salivary amylase is an example of mechanical digestion. - CORRECT ANSWERFalse: chemical digestion Label the following three types of raised bumps on the tongue. Describe the purpose of type C A: Filiform papillae B: Circumvallate papillae C: Fungiform papillae - CORRECT ANSWERThe papillae are raised bumps on the tongue. The three types of papillae help to grip food on the tongue: circumvallate, fungiform and filiform. Fungiform papillae contain taste buds. Which of the following statements is true concerning glycolysis? - Pyruvic acid are broken down into glucose. - Two ATP molecules are formed in first breakdown of glucose. - Glucose is broken down into three pyruvate molecules. - Glucose is broken down into two sucrose molecules. - CORRECT ANSWERTwo ATP molecules are formed in first breakdown of glucose Which of the following statements is false concerning the second stage of glucose breakdown? a. This second stage is also known as the TCA cycle. b. Pyruvic acid is converted to carbon dioxide. c. Additional ATP is formed. d. This is also known as the electron transport system - CORRECT ANSWERd. This is also known as the electron transport system Which of the following statements is false concerning the Electron Transport System? a. Anaerobic respiration is more efficient than aerobic respiration. b. Approximately a total of 34 ATP are formed. c. Protons are pumped out of the inner mitochondrial membrane. d. The proton motive force forms ATP molecules - CORRECT ANSWERa. Anaerobic respiration is more efficient than aerobic respiration. Label the following on a diagram: A: Left Central Incisor; It is Chisel-shaped for biting food. A: Left Central Incisor C: Left Canine (cuspid)