Which system maintains the volume and composition of body fluids?
A. Integumentary
B. Immune
C. Digestive
D. Urinary
E. Circulatory
Answer: D
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Which of these diagrams represents an age structure diagram of more-developed countries?
A. Diagram A B. Diagram B
Four of the five answers listed below are related by their participation in water movement through plants. Select the exception
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During sexual arousal, the _____ secrete a small amount of a clear alkaline fluid, which appears as droplets at the tip of the penis before ejaculation occurs.
A. vas deferens B. seminal vesicles C. Cowper's glands D. interstitial cells.