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Allisa [31]
3 years ago
11

The kidneys control the amount of water, ions, and other substances in the blood.

Biology
1 answer:
Vilka [71]3 years ago
4 0
True due to the hormones that act upon the kidneys Two examples being Antidiuretic Hormone (ADH) and Aldosterone 
ADH increases water permeability of the kidney tubules and Aldosterone decreases the Sodium in the urine and increases the Potassium. 

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What is an example of a density dependent factor
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In nature, limiting factors affecting population sizes include how much food and/or shelter is available, as well as other density-dependent factors. Density-dependent factors are not relevant to populations that are below "carrying capacity," (i.e., how much life a habitat can support) but they start to have to become noticeable as populations reach and exceed that limit. The degree of control imposed by a density-dependent factor correlates to population size such that the effect of the limitation will be more pronounced as population increases. Density-dependent factors include competition, predation, parasitism and disease.

Competition

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Predation

Many populations are limited by predation; predator and prey populations tend to cycle together, with the predator population lagging somewhat behind the prey population. The classic examples of this are the hare and the lynx: as the hare population increases, the lynx has more to eat and so the lynx population can increase. The increased lynx population results in more predatory pressure on the hare population, which then declines. The drop in food availability in turn causes a drop in the predator population. Thus, both of these populations are influenced by predation as a density-dependent factor.

Parasitism

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