Answer:
As caffeine utilizes all the receptors adenosine binds to, the cells can no longer sense adenosine. As a result, instead of slowing down because of the adenosine level, cellular activity speeds up. Caffeine blocks adenosine's ability to open up the brain's blood vessels, causing them to constrict.
Most organic acids are weak. Hydrogen fluoride (dissolving in water to produce hydrofluoric acid) is a weak inorganic acid that you may come across elsewhere.
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acid Ka (mol dm-3)
hydrofluoric acid 5.6 x 10-4
methanoic acid 1.6 x 10-4
ethanoic acid 1.7 x 10-5
hydrogen sulphide 8.9 x 10-8
Answer:1.) solute too large for channels
2.) solute not lipid soluble
3.) solute not able to move down concentration gradient.
Answer:
Hello. You did not enter the answer options, but the factor that most directly influences a measurable result in an experiment is the manipulation of the variables.
Explanation:
In an experiment, the manipulation of variables becomes highly important so that it is possible to measure, that is, evaluate the result. This is because it is the variables that express values that represent the characteristics that are being analyzed and studied within the experiment. Therefore, the manipulation between them must be done in a very rational and balanced way so as not to modify the values shown by them, changing the data and generating false or immeasurable data.
The answer is: <span>D. The population of bluebirds will decrease, leading to an eventual decrease in the number of predators.
The unwanted </span><span>dumping of chemicals causes a decrease in the number of insects. The insects are eaten by bluebirds, but if there is not enough food for the bluebirds, they will die- decrease of birds. If there are less bluebirds, their predators will have less food, so many of them will also die.</span>
