The immune system and the nervous system maintain extensive communication, including 'hardwiring' of sympathetic and parasympathetic nerves to lymphoid organs. Neurotransmitters such as acetylcholine, norepinephrine, vasoactive intestinal peptide, substance P and histamine modulate immune activity.
Answer:
application of chemical fertilizers
Explanation:
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Answer:
2: Amount of precipitation, average temperature
3: Desert
4: The tundra
5: All of the above
Answer:
Viruses are not made of cells as a living thing is.
Explanation:
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