Local hormones that act on neighboring cells are called:

A) Exocrines
B) Paracrines
C) Circulating hormones
D) Autocrines


Ans: B) Paracrines

Anatomy & Physiology

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a. mucosa. b. submucosa. c. muscularis mucosa. d. muscularis externa. e. mesentery.

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The dura mater surrounding the brain consists of two layers. Give a functional reason for the fact that there are two layers instead of only one.

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Which does NOT apply to hormones?

A. They are secreted into the blood by ductless glands. B. All hormones are derived from cholesterol. C. They are sometimes secreted by neural tissue. D. In some cases, the same chemical substances can also function as local regulators and/or neurotransmitters. E. They are chemical regulators that are conveyed from one organ to another via the bloodstream.

Anatomy & Physiology