BSC 1005 Exam 3 questions And Answers Verified 100% Correct

BSC 1005 Exam 3 questions And Answers Verified 100% Correct 1) The stomach's gastric glands secrete ______. A) mucus only B) digestive enzymes only C) digestive enzymes and hydrochloric acid D) mucus, digestive enzymes, and hydrochloric acid E) hydrochloric acid only - ANSWER -D) mucus, digestive enzymes, and hydrochloric acid 2) How many chromosomes does an individual with Turner syndrome have? A) n + 1 B) 4n C) n - 1 D) 2n - 1 E) 2n + 1 - ANSWER -D) 2n - 1 3) Absorption of water is one major function of which of the following structures? A) colon B) appendix C) esophagus D) cecum E) rectum - ANSWER -A) colon 4) Vitamins are ______. A) organic molecules that are required in the diet in very small amounts B) nutrients that we can synthesize from simpler molecules C) required to synthesize most amino acids D) only required by children E) none of the above - ANSWER -A) organic molecules that are required in the diet in very small amounts 5) Bile from the liver is stored in the ______ before entering the intestine. A) gallbladder B) pancreas C) bile duct D) blood E) intestinal wall - ANSWER -A) gallbladder 6) How does Helicobacter pylori cause gastric ulcers in humans? A) It causes the production of excess acid in the stomach. B) H. pylori does not cause gastric ulcers. C) It neutralizes the acids of the stomach. D) It damages the stomach's mucus coat. E) None of the choices are correct. - ANSWER -D) It damages the stomach's mucus coat. 7) What is the epiglottis? A) a flap that flips down to cover the entry to the trachea during swallowing B) a muscular sphincter that closes off the entry to the trachea during swallowing C) a flap of skin that covers the entry to the trachea except during breathing D) a muscle that moves the trachea out of line with the pharynx during swallowing E) a muscle that moves the esophagus into line with the pharynx during swallowing - ANSWER -A) a flap that flips down to cover the entry to the trachea during swallowing 8) A true-breeding plant that produces yellow seeds is crossed with a true breeding plant that produces green seeds. The seeds of all of the offspring are yellow. Why? A) All of the offspring are homozygous yellow. B) Yellow is an easier color to produce. C) The alleles are codominant. D) The yellow allele is dominant to the green allele. E) The yellow allele is recessive to the green allele. - ANSWER -D) The yellow allele is dominant to the green allele. 9) ______ the direct source of energy for cells. A) Glucose is B) Amino acids are C) Vitamins are D) Fats are E) ATP is - ANSWER -E) ATP is 10) Which of the following nutrients begins undergoing digestion only when it reaches the small intestine? A) complex carbohydrate B) protein C) polypeptide D) fat E) starch - ANSWER -D) fat 11) What is the main digestive function of the pancreas? A) It secretes mucus into the small intestine. B) It produces digestive enzymes and bile. C) It aids in the control of cholesterol. D) It produces bile. E) It produces digestive enzymes and neutralizes stomach acids. - ANSWER -E) It produces digestive enzymes and neutralizes stomach acids. 12) The epithelial cells lining the intestine have surface projections that increase the area for absorption. These projections are called ______. A) microvilli B) flagella C) cilia D) rugae E) villi - ANSWER -A) microvilli 13) Which of the following is the usual cause of heartburn? A) backflow of chyme from the stomach into the esophagus