单项选择题

The author's main purpose of writing the passage is ________.

A．to explain the specific functions of various hormones
B．to provide general information about hormones
C．to explain how the term "hormone" evolved
D．to report on experiments in endocrinology
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单项选择题
Which of the following conclusions does the passage support
A．The human body requires large amounts of most hormones.
B．Synthetic hormones can replace a person's natural supply of hormones if necessary.
C．The quantity of hormones produced and their effects on the body are related to a person's age.
D．A short child of tall parents very likely has a hormone deficiency early in life.
单项选择题
Which of the following statements is NOT TRUE, according to the passage
A．In the 19th century, people believed the nervous system completely controlled communication within the body and the consequent integration of behavior.
B．Starling was the first person to use hormone to refer to secretin.
C．The experiments of Bayliss and Starling led to the separation of endocrinology from other disciplines.
D．The pancreas, which secretes pancreatic juice through a duct into the bloodstream, is an exocrine gland.
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