A nurse cares for clients with hormone disorders. Which are common key features of hormones? (Select all that apply.)
a. Hormones may travel long distances to get to their target tissues.
b. Continued hormone activity requires continued production and secretion.
c. Control of hormone activity is caused by negative feedback mechanisms.
d. Most hormones are stored in the target tissues for use later.
e. Most hormones cause target tissues to change activities by changing gene activity.
ANS: A, B, C
Hormones are secreted by endocrine glands and travel through the body to reach their target tissues. Hormone activity can increase or decrease according to the body's needs, and continued hormone activity requires continued production and secretion. Control is maintained via negative feedback. Hormones are not stored for later use, and they do not alter genetic activity.
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