The sympathetic and parasympathetic divisions of the autonomic nervous system tend to have opposing actions on target organs.
Answer the following statement true (T) or false (F)
True
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In SCUBA diving, breathing gas, a mixture of oxygen and other gases, is carried in a breathing tank on the diver's back. This gas must be pressurized so the diver can breath underwater; it is not sufficient to simply bring unpressurized breathing gas or normal air underwater. Based on the Fick diffusion equation, what can you conclude about the concentration of oxygen available to the diver underwater?
A. The atmospheric and water pressure increases the amount of oxygen that can be extracted from unpressurized breathing gas. B. The atmospheric and water pressure does not affect the amount of oxygen that can be extracted from unpressurized breathing gas. C. The concentration of oxygen is lower in breathing gas than in normal air. D. The atmospheric and water pressure decreases the amount of oxygen that can be extracted from unpressurized breathing gas.
What is true for both male and female gametogenesis?
_____ Gametes are produced by meiosis. _____ Gametes develop in the gonads. _____ Primary cells are haploid. _____ Each primary cell results in four gametes.
Conservation is concerned with applying scientific knowledge to prevent the loss of biodiversity. Which of the following human activities is least likely to threaten biodiversity?
A) organic farming B) habitat destruction C) overexploitation D) introduced species
To prevent dehydration, reptiles have
A) scaly skin. B) embryos that lack gills. C) moist, slime-covered skin. D) eggs that contain no water. E) a four-chambered heart.