Hormones are intercellular chemical signals that

A. help coordinate growth, development and reproduction.
B. are secreted into the external environment where they act.
C. operate primarily by positive feedback.
D. affect only non-hormone producing organs or tissues.


Answer: A

Anatomy & Physiology

You might also like to view...

How many primary oocytes does a female have by the onset of puberty?

A. 400,000 B. 500,000 C. 1 million D. 2 million E. 1,000

Anatomy & Physiology

Ammonia, uric acid, and urea are similar in that they all eliminate the element __________ from the body

Fill in the blank with the correct word.

Anatomy & Physiology

What part of the female reproductive system receives the penis during sexual intercourse?

A) vagina B) uterus C) uterine tube D) clitoris

Anatomy & Physiology

________ is liver inflammation that can be caused by the use of unsanitary needles.

A. Cirrhosis B. Hepatitis C. Jaundice

Anatomy & Physiology