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Blood Pressure Regulators
The body is composed of systems that have evolved and diversified in order to maintain the natural functions and processes they regulate. One such system that has these regulators is the bodyĆ¢Ä‚¬Ä„¢s cardiovascular system. The bodyĆ¢Ä‚¬Ä„¢s pump, which regulates the flow of vitally needed oxygen to all cells of the body, as well as the discard of carbon dioxide and other waste products, is the heart.
Because blood pressure varies at different points within the body, differing components are needed to keep the bodyĆ¢Ä‚¬Ä„¢s blood pressure regulated. Three of the basic components are baroreceptors, chemoreceptors, and the kidneys.
Baroreceptors are stretch receptors composed of fine branching nerve endings and are contained along the walls of the arteries near the heart and in other areas of the body as well. Impulses are related to this stretching along the arterial walls, which causes these baroreceptors to send out even more impulses to the heart, arteries, and veins, causing the blood pressure to go either up or down.
Chemoreceptors are located along the walls of the arteries and monitor changes in oxygen level, carbon dioxide, and pH. Just think! A fall in oxygen causes receptors to send impulses to raise the blood pressure.
The kidneys play a role in regulating blood pressure by absorbing salts and water and removing wastes. Hormones secreted by the adrenal cortex cause the kidney to keep or let go of any salt and water. This has an influence on blood volume and consequently on blood pressure.
Which statement is not a detail from the passage?
- A. Baroreceptors are stretch receptors composed of fine branching nerve endings along the arterial walls and send out messages in response to stretching.
- B. Chemoreceptors are located along the walls of the arteries and monitor changes in oxygen level, carbon dioxide, and pH.
- C. The kidneys play a role in regulating blood pressure by absorbing salts and water.
- D. The heart is the body's pump, regulating the flow of oxygen to all cells and removing waste products.
Correct Answer: A
Rationale: The correct answer is A because the statement incorrectly describes baroreceptors as rigid and static nerve endings when, in fact, they are stretch receptors composed of fine branching nerve endings. The passage clearly states that baroreceptors are stretch receptors along the arterial walls that send messages in response to stretching, not rigid and static. Choices B, C, and D are all accurate details from the passage regarding chemoreceptors, the kidneys' role in regulating blood pressure, and the heart's function in oxygen transport and waste removal, respectively.
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Searching for medical information can be confusing, especially for first-timers. However, if you are patient and stick to it, you can find a wealth of information. Your community library is a good place to start your search for medical information. Before going to the library, you may find it helpful to make a list of topics you want information about and questions you have. Your list of topics and questions will make it easier for the librarian to direct you to the best resources. Many community libraries have a collection of basic medical references. These references may include medical dictionaries or encyclopedias, drug information handbooks, basic medical and nursing textbooks, and directories of physicians and medical specialists (listings of doctors). You may also find magazine articles on a certain topic. Look in the Reader’s Guide to Periodical Literature for articles on health and medicine from consumer magazines. Infotrac, a CD-ROM computer database available at libraries or on the Web, indexes hundreds of popular magazines and newspapers, as well as medical journals such as the Journal of the American Medical Association and New England Journal of Medicine. Your library may also carry searchable computer databases of medical journal articles, including MEDLINE/PubMed or the Cumulative Index to Nursing and Allied Health Literature. Many of the databases or indexes have abstracts that provide a summary of each journal article. Although most community libraries don’t have a large collection of medical and nursing journals, your librarian may be able to get copies of the articles you want. Interlibrary loans allow your librarian to request a copy of an article from a library that carries that particular medical journal. Your library may charge a fee for this service. Articles published in medical journals can be technical, but they may be the most current source of information on medical topics.
What is the meaning of the word 'technical' as it is used in the fourth paragraph?
- A. requiring expert knowledge
- B. incomplete
- C. foreign
- D. plagiarized
Correct Answer: A
Rationale: The word 'technical' in the fourth paragraph refers to information that is complex and requires expert knowledge to understand. Medical journal articles are often technical in nature, containing specialized terminology and detailed research findings that may be challenging for the general public to interpret. Therefore, choice A, 'requiring expert knowledge,' is the correct meaning of 'technical' in this context.
Subjective exams measure your ability in several areas. Besides recall information, you must be
able to realize content logically and intelligently express yourself in a clearly understood manner. Subjective test provide opportunity for students to show their broad knowledge of a subjective
area. Answers may be in the form of paragraphs or lengthy essays. When your review for an essay exam, concentrate on main ideas rather than details. Since essay tests are less to a few questions, they are likely to deal with more important ideas of a subject. Prepare a list of question you think might be asked. Write an answer to each of your questions. Rather than writing complete sentence down your thoughts in outline form. Doing so will help
you organize the information so that you can express yourself clearly.
When you take the test, read through all the questions before you start to write. Allot time for each question, spending more time for questions worth the most points. Read each question carefully to determine exactly what they are asked. Pay attention to words such as define, illustrate, explain, list, compare, and contrast. Each work requires a different type of response. Write a brief outline of your answer on scrap paper or the back of the test. Make sure you include all the important ideas that are within the limits of the question. In other words, do not write more than is asked for each answer. When you write your answer, keep it specific and as brief as possible. In the introductory sentence it is often helpful to make a general statement that includes
important points addressed in each question. Such a topic sentence serves as a framework for your answer. Then use your outline to develop the main point and subtopics. Add substance to
your answer by including as many facts as possible to support your answer.
Check your paper before you submit it. Look for mistakes in grammar, spelling, sentence
structure, and punctuation. Unless you are certain an answer is wrong, do not change it. Your answer is an educated guess and is usually your best chance of answering correctly.
From the article, the reader can conclude that a test containing true-false questions is called what?
- A. Subjective
- B. Rejective
- C. Objective
- D. Detective
Correct Answer: C
Rationale: The correct answer is C: 'Objective.' The article distinguishes between subjective and objective tests. Objective tests, such as those containing true-false questions, have definitive answers that are either true or false. These questions are considered objective because they are not open to interpretation and are designed to measure specific knowledge or facts. On the other hand, subjective tests, as mentioned in the article, involve essay questions where responses are more interpretive and open-ended. Therefore, based on the information provided, the appropriate term for a test containing true-false questions is 'Objective.'
ALL THE JAZZ
Jazz has been described as "the art of expression set to music" and "America's great contribution to music." It has served as popular art, enjoying periods of widespread public interest during the "jazz age" of the 1920s, the "swing era" of the late 1930s, and the peak popularity of modern jazz in the late 1950s. The standard narrative is that jazz originated around the end of the 19th century in New Orleans before moving up the Mississippi River to cities like Memphis, St. Louis, and finally Chicago. Jazz emerged by blending elements of ragtime, marching band music, and the blues. However, its roots trace back to tribal African drum beats and European musical structures. Buddy Bolden, a New Orleans barber and cornet player, is generally considered the first real jazz musician, emerging around 1891. What sets jazz apart from earlier musical forms is its emphasis on improvisation. Unlike traditional music, where composers write entire pieces on paper for musicians to follow exactly, jazz offers a starting point—a skeletal guide for musicians to improvise around. Many early jazz musicians were poor sight readers, with some unable to read music at all. Consequently, they often struggled to make a living, working menial jobs to survive. The second wave of New Orleans jazz musicians included notable figures like Joe Oliver, Kid Ory, and Jelly Roll Morton. These artists formed small bands, built upon earlier styles, and enhanced the music's complexity, achieving greater success. This energetic style became known as "hot jazz" due to its fast tempos and rhythmic drive. A young cornet player named Louis Armstrong was discovered by Joe Oliver in New Orleans. Armstrong went on to become one of the greatest and most successful musicians of all time, later emerging as a global star. The impact of Armstrong and other talented early jazz musicians transformed our perception of music.
Where and when did jazz originate?
- A. Southern US, 18th century
- B. Northern US, 19th century
- C. Western US, 20th century
- D. New Orleans, 20th century
Correct Answer: D
Rationale: Jazz originated in New Orleans in the 20th century. The standard legend is that it originated around the end of the 19th century in New Orleans, making the 20th century the correct time period. New Orleans is specifically mentioned as the birthplace of Jazz in the question's extract, solidifying it as the correct location of origin.
About 6% of the earth is covered by rainforests. The largest rainforest in the world is the
Amazon Basin, which stretches over 2.3 million square miles in nine different South American countries. This area is double the length of all the other remaining rainforests in the world. Brazil contains 60%of the Amazonian rainforest, since it lies at the mouth of the river Amazon. This river is the second largest in the world and contains more than one-fifth of the world's fresh water. The Amazon rainforest is a type of wet broadleaf forest. The weather there is very humid and warm as it rains quite a bit. Because of the high rainfall, the forest is very rich and green. The
tree leaves are pointed and narrow so that the raindrops can easily drop off wet plants. This
tropical rainforest has more living species than the entire European continent. There are over 400 types of insects living in one single rain forest tree for a total of 2.5 million species. One square kilometer of rainforest may contain over 75,000 types of trees and approximately 438,000
different kinds of plants, which comes to a total of 90,000 tons of greenery overall. The Amazon rainforest is home to 2,000 birds and mammals, with one in every five birds in the world living there. Local farmers have lived off this rich and diverse land for thousands of years. They have been able to find food and water here without destroying the land. The Kayapo people of Brazil
farm in an environmentally-friendly way. Instead of chemicals, they use burned wood to enrich the soil, and plant banana trees, which attract wasps. These wasps then feed on leafcutter ants and get rid of these harmful insects. The rainforest also offers a lot of tropical fruits, such as bananas and coconuts, as food.
Cinnamon is made from the bark of a rainforest tree. Amazonian Indians use the fruit and stem
of the Buruti plant as a drink, to make bread and to build houses. Many other plants are used as medicine. But the Amazon rainforest is in very big danger of disappearing. 9,169 square miles of
forest have been cut down in 2003 in Brazil alone. An area of the size of a football field is burned down basically every minute, which means that the rain forest may be gone by the year 2030.The dangers related to this type of activity are obvious. Trees take in poisonous carbon
dioxide from the air and give off oxygen. There is more oxygen and less carbon dioxide around a
rainforest. When trees are cut down, however, the amount of carbon dioxide increases, and the
air gets warmer. This leads to global warming, which is extremely harmful to the environment. It
is estimated that the burning of Brazilian rainforests alone produces 200 million metric tons of carbon dioxide ayear. Another danger connected with destroying the rainforest is the disappearance of plants and animals. When trees are cut down, plants and animals have no more
food left and slowly die out. Killing wild animals is illegal in Brazil, but there is plenty of stealing going on. 38 million animals are stolen and sold illegally each year. The most hunted
animals are birds, especially parrots, followed by snakes and the jaguar.
How can you describe the Amazon rainforest?
- A. It rains all the time there, so the forest is always green.
- B. The weather is so hot that not many tourists come to visit.
- C. The plants are shaped so that rainwater can pour off them.
- D. There is a lot of fresh water coming from the Amazon River.
Correct Answer: A
Rationale: The correct answer is A. The Amazon rainforest is characterized by high rainfall, which keeps the forest lush and green. The text mentions that the weather is very humid and warm due to frequent rain, leading to a rich and green forest. Additionally, it describes how the tree leaves are shaped to allow raindrops to easily fall off wet plants, highlighting the adaptation to the high rainfall in the region.
Homonyms: English is a vibrant, changing, dynamic language. It allows people to express their thoughts in diverse ways, as there are many synonyms and antonyms to choose from. The hardest part for the English speaker—or those learning English as a second language—
is learning about homonyms. These are words that sound alike but are spelled different ways, with different meanings.
One example is 'Our'. This word, spelled 'one' means the numeral 1, an amount. If spelled 'won,' it means to be victorious. Now words spelling is a difficult skill to master.
Other homonyms encountered by the beginning English speaker are 'To, two, too,' 'four, for, fore,' 'there, their, they're' and 'son, sun' to name just a few. This is one reason that 'spell check' programs on word processing computers cannot be completely accurate, because the way a word is spelled depends on the context of the sentence. Proofreaders will always be in demand.
How does the article define 'Homonyms'?
- A. English words that have their etiology from Latin.
- B. Words that have opposite meanings.
- C. Words that mean the same, or nearly the same; interchangeable.
- D. Words that sound alike but are spelled different ways with different meanings.
Correct Answer: D
Rationale: The correct answer is D: Words that sound alike but are spelled different ways with different meanings. The rationale is that the article explicitly states that homonyms are words that sound alike but are spelled differently and have different meanings. This definition aligns perfectly with option D.
Choice A is incorrect because homonyms are not defined by their etymology or origin from Latin. Choice B is incorrect because homonyms are not words that have opposite meanings; words with opposite meanings are known as antonyms. Choice C is incorrect because homonyms are not words that mean the same or nearly the same; that would be synonyms.