BIO 182 Exam 2 Questions and Answers All Correct

The respiratory system of which of the following organisms relies on air sacs to move air through the lungs? birds mammals fish amphibians reptiles - Answer-birds Which of the following statements is true regarding respiration in mammals? Select all that apply. A. Air moves in a unidirectional fashion through the lungs. B. Gas exchange occurs in the bronchioles. C. Gas exchange occurs in the alveoli. D. Respiration depends on changes in air pressure in the chest cavity. E. Respiration depends on contractions of the diaphragm. - Answer-C,D,E Simple multicellular organisms that are small can meet their gas exchange needs by means of: Select all that apply. A. a flattened body shape that increases surface area B. a flattened or thin body shape that reduces the distance between cells inside their body and the external environment C. by living in air that provides abundant oxygen, even though they are at risk of losing water and drying out D. by living in water so that they do not dry out from water loss, even though water has less oxygen per volume than air E. by relying on anaerobic respiration (glycolysis) for long time periods, so that they don't need to use oxygen for aerobic respiration - Answer-A,B,D