The strength of a stimulus (for example, whether you feel a slight pain versus an intense pain) determines the number of action potentials sent along an axon. as the graphs show, a strong stimulus produces more action potentials spaced more closely together than a weak stimulus.

the time between when a first action potential ends and a second action potential can be triggered is determined by the axon's refractory period. a second action potential cannot be triggered until the end of the refractory period.

which determines when refractory period ends?

answer; bodies of water store heat during the day and release it at

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

a bird that nests only in a particular tree species.