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
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Fill in the blank with the correct word.
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
What part of the female reproductive system receives the penis during sexual intercourse?
A) vagina B) uterus C) uterine tube D) clitoris
________ is liver inflammation that can be caused by the use of unsanitary needles.
A. Cirrhosis B. Hepatitis C. Jaundice