Problem 1
Respiratory proteins such as hemoglobin _____________ a. contain metal ions b. occur only in vertebrates c. increase the efficiency of oxygen transport d. both a and \(c\)
Problem 2
In __________, gas exchange occurs at the body surface and gas is distributed by diffusion alone. a. fishes c. birds b. amphibians d. all of the above
Problem 3
Countercurrent flow of water and blood increases the efficiency of gas exchange in __________ a. fishes c. birds b. amphibians d. all of the above
Problem 4
In human lungs, gas exchange occurs at the _____________ a. two bronchi b. pleural sacs c. alveoli d. both \(b\) and \(c\)
Problem 5
When you breathe quietly, inhalation is _______________ and exhalation is ___________ a. passive; passive b. active; active c. passive; active d. active; passive
Problem 7
What type of metal associates with hemoglobin?
