All animals require water, and it may be provided in many forms. Which of the following is NEVER a source of water for an animal?
A) Seawater
B) Dietary water
C) Products of hydrolysis
D) Products of oxidative phosphorylation
Answer: C
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The independent routes to endothermy of birds and mammals can be explained by the ________________evolution of insulation
Fill in the blank with the correct word.
The sites of gas exchange within the lungs are the
A) bronchioles. B) terminal bronchioles. C) pleural spaces. D) alveoli. E) falciform ligaments.
Muscular force can be adjusted to match increased loads by
A) increasing the frequency of action potentials in motor neurons. B) recruiting smaller motor units. C) recruiting fewer motor units. D) decreasing the frequency of action potentials in motor neurons. E) None of the answers is correct.
Hypersecretion of growth hormone can cause gigantism if it begins in childhood, but is more likely to cause ___ if it begins in adulthood.
a. Cushing's syndrome b. acromegaly c. myxedema d. dwarfism e. Grave's disease