To accommodate for their high surface to volume ratio, smaller mammals
a. reduce the size of each alveolus.
b. increase alveolar density.
c. increase the density of capillaries used in gas exchange.
d. reduce the size of each alveolus and increase alveolar density.
e. all of these.
E
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Blood in the pulmonary veins returns to which chamber of the heart?
A. Left ventricle B. Coronary sinus C. Right ventricle D. Left atrium E. Right atrium
The steps in the process of endochondral ossification are a: Ossification center forms in the diaphysisb: Cartilage calcifies and a bone collar formsc: Ossification centers form in the epiphysesd: Bone replaces cartilagee: Epiphyseal plates ossifyf: Cartilage model developsThe correct chronological order for these steps is
A. f - b - c - d - a - e B. a - e - c - d - b - f C. f - b - a - c - d - e D. b - c - f - a - e - d E. a - c - b - d - e - f
Effects of hypokalemia include
A. muscle weakness. B. diabetes. C. acne. D. sweating.
The kidneys help to regulate the pH of body fluids by controlling the
A. Secretion of hydrogen ions B. Conversion of acids to bases C. Filtration of buffers D. Reabsorption of CO2