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Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system.
The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless.
1.What is the author’s main purpose in the passage?
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.
2.The passage supports which of the following conclusions?
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.The short child of tall parents very likely had a hormone deficiency early
in life.
3.It can be inferred from the passage that before the Bayliss and Starling
experiments, most people believed that chemical integration occurred
only___.
A.during sleep.
B.in the endocrine glands.
C.under control of the nervous system.
D.during strenuous exercise.
4.The word “liberate” could best be replaced by which of the following?
A.Emancipate B.Discharge C.Surrender D.Save
5.According to the passage another term for exocrine glands is___.
A.duct glands
B.endocrine glands
C.ductless glands
D.intestinal glands.
Passage 4
Questions 16 to 20 are based on the following passage:
I recently wrote an autobiography in which I recalled many old memories. One
of them was from my school days, when our ninth grade teacher, Miss Raber, would
pick out words from the Reader’s Digest to test our vocabulary.
Today, more than 45 years later, I always check out “It pays to Enrich Your
Word Power” first when the Digest comes each month. I am impressed with that
idea, word power. Reader’s Digest knows the power that words have to move
people—to entertain, inform, and inspire. The Digest editors know that the big
word isn’t always the best word. Take just one example, a Quotable Quote form
the February 1985 issue: ”Time is a playful thing. It slips quickly and drinks
the day like a bowl of milk.”
Nineteen words, only two of them more than one syllable, yet how much they
convey! That’s usually how it is with Reader’s Digest. Small and simple can be
profound.
As chairman of a foundation to restore the Statue of Liberty, I’ve been
making a lot of speeches lately. I try to keep them fairly short. I use small
but vivid words: words like “hope”, “guts”, “faith”, “dreams”. Those are words
that move people and say so much about the spirit of America.
Don’t get me wrong. I’m not against using big words, when it is right to do
so, but I have also learned that a small word can work a small miracle—if it’s
right word, in the right place, at the right time. It’s a “secret” that I hope
never forget.
16. The passage is mainly about .
A. one of the many old memories
B. using simple words to express profound ideas
C. Reader’s Digest and school speeches
D. how to make effective speeches
17. It seems that Reader’s Digest is a magazine popular with .
A. people of all ages B. teenagers C. school teachers D. elderly readers
18. The example the author gives in the second paragraph might mean .
A. one spends his day playing and drinking
B. don’t waste your time as one does
C. time slips easily if you don’t make good use of it
D. time is just like drinking milk from a bowl
19. The author’s “secret” is .
A. to avoid using big words at any time
B. to use words that have the power to move people
C. to work a miracle by using a small word
D. to use small and simple words where possible
20. Accoeding to the author, well-chosen words can give people .
A. hope, courage and ideas
B. confidence, determination and strength
C. pleasure, knowledge and encourage
D. entertainment, information and power
Questions 16 to 20 are based on the following passage:
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