Answer: "homeostasis" .
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The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
Epinephrine is also known as adrenaline. It is produced by both the adrenal glands and the certain neurons. It is used to treat some conditions like cardiac arrest, anaphylaxis and more. Its actions vary by tissue type and tissue expression of then receptors. It is binding to a variety of adrenergic receptors.It also help to increase peripheral resistance.