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Compare Communication Modes [Mini Skill]
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AP Biology
APB.209 Compare Communication Modes [Mini Skill]
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Cytokines released by immune cells activate nearby cells at an infection site, while cortisol released from an adrenal gland enters blood and affects distant tissues. Which source-route-range comparison is correct?
A
Cytokines here are direct contact through plasmodesmata; cortisol is local because it is chemical.
B
Both are direct contact because immune and endocrine cells both use receptors.
C
Cytokines here are local: nearby immune source and short diffusion; cortisol is long-distance: endocrine source and blood transport to distant receptor-bearing cells.
D
Cytokines here are long-distance through blood; cortisol is direct contact because it comes from a gland.
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