Blood Pressure
Lub-dub! Lub-dub! Lub-dub! This sound is made by the rapid contracting and extending of the chamber doors on the inside of the heart. This ventricular contracting injects roughly 70 mL of blood into a vascular system with a given volume at differing pressure. Blood pressure refers to the pressure in the arterial system; and it is typically taken in the brachial artery of the arm because the pressure at different places along the circulatory route is different. Blood pressure is simply the force that the blood exerts in all directions within any given area and is the basis for the movement of blood from the heart, through the body, and back to the heart. This pressure is commonly expressed as a ratio of the systolic pressure over the diastolic pressure. The systolic pressure or “high peak†pressure takes place within the arterial system as ventricles contract and force blood into the arteries. The diastolic pressure or “low peak†pressure takes place within this arterial system just before the next ventricular contraction. An increase in blood pressure can occur if the arterial walls lose some of their elasticity with age or disease.
Which of the following is not a fact stated in the passage?
- A. Ventricular contracting injects roughly 70 mL of blood into the vascular system.
- B. Blood pressure is typically measured in the brachial artery of the arm.
- C. Blood pressure is commonly expressed as a ratio of systolic pressure over diastolic pressure.
- D. Loss of arterial wall elasticity is always caused by disease.
Correct Answer: D
Rationale: The passage discusses that an increase in blood pressure can be due to the loss of arterial wall elasticity, which can occur with age or disease. However, it does not state that the loss of arterial wall elasticity is always caused by disease. Therefore, choice D is not a fact mentioned in the passage, making it the correct answer.
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The Summer Olympic Games. Once every four years the countries of the world send their best and brightest to participate in the Summer Olympic Games. The site for the event is decided years before, and most countries contend strongly for the privilege to host the Games. The 2008 games were held in Bejing, China.
There is a lot of pageantry and tradition attached to the event. The opening ceremony is elaborate and awe-inspiring. China put on a spectacularly beautiful fireworks display to welcome the world's athletes in 2008.
The track events, water events (swimming, diving) and precision activities such as archery and rhythmic gymnastics are wonderful to watch. Seeing these athletes perform their special skills is a treat for those of us who achieve a vicarious satisfaction from it. Everyone roots for the athletes from their own country and we thrill when our anther is played during the medal ceremony. Being an Olympian is an honor every athlete dreams of.
What is the meaning of the word 'roots' as used in the third paragraph?
- A. The part of a plant under the ground.
- B. To wish the success of.
- C. A musical tone upon which a piece of music is based.
- D. To dig in the earth with a snout.
Correct Answer: B
Rationale: In the context of the third paragraph, the word 'roots' is used to describe how people support and cheer for the athletes from their own country. 'To wish the success of' is the correct interpretation, making choice B the correct answer. The other definitions of 'roots' refer to different meanings that do not fit the context of cheering for athletes.
It is a well-known fact that it takes the Earth approximately 365 days to orbit the Sun. At the same time, the Earth revolves or spins around itself over the course of 24 hours, which explains why we experience day and night. One half of the Earth is always facing the Sun, while the other half is facing away. As a result, different time zones divide the globe. Moving suddenly from one time zone to another, such as when flying from Asia to North America, can cause jet lag. People often feel tired, wake up suddenly during the night, and cannot return to sleep. It takes time to adjust to a new time zone. Another important factor to consider is the slight tilt of the Earth toward the Sun. The Earth does not stand straight but leans slightly to one side. Therefore, when it revolves around the Sun, the middle part of the Earth is always closer to the Sun and receives more heat. This area is called the equator, and the regions above and below it are known as the tropics. Countries located in the tropics receive a consistent amount of daylight throughout the year, with the Sun rising at 6 AM and setting at 6 PM. In contrast, the tips of the Earth, or the poles, receive hardly any light because they are so far from the Sun. There are two main seasons at the poles: 6 months of summer, when the Sun is always shining (even at night), and 6 months of winter, characterized by constant darkness. Between the tropics and the poles lies the temperate zone, where there are four distinct seasons. The Sun rises and sets at different times throughout the year. In spring and summer, it gets light earlier; in fall and winter, it gets dark earlier. People living in temperate zones take advantage of this variation to maximize their daylight exposure. At the beginning of spring, countries in Europe and North America readjust their clocks by moving them an hour ahead. As a result, the Sun does not set around 7 or 8 PM as usual, but an hour later. This practice is called Daylight Savings Time (DST) and lasts until the beginning of fall, when people move their clocks back one hour to Standard or Regular Time. It is believed that Benjamin Franklin first suggested the introduction of Daylight Savings Time in the 18th century, but the first serious proposal came in 1907 from William Willet. However, his idea was shelved by the British government, which deemed it unnecessary. Daylight Savings Time was first implemented by the German government in 1916 in order to save energy during World War I. Shortly after, the United Kingdom followed suit, with the United States doing the same in 1918. The law was unpopular, as people had to wake up earlier, leading many to experience a feeling similar to jet lag. However, the energy crisis of the 1970s forced the U.S. to establish Daylight Savings Time as law. Studies showed that the introduction of Daylight Savings Time in the spring saved the U.S. 10,000 barrels of oil per day between 1974 and 1975. It also prevented 2,000 traffic injuries and 50 traffic-related deaths, saving the country $28 million. Currently, Americans switch to Daylight Savings Time on the first Sunday in April and revert to Standard Time on the last Sunday in October. As of 2007, the time adjustments occur even earlier in March and November.
Which of the following is NOT mentioned in the passage?
- A. The cause of jet lag
- B. The amount of daylight at the tropics
- C. Why the time readjustment will happen
- D. Why the British government refused Daylight Savings Time
Correct Answer: D
Rationale: The passage discusses various aspects related to time zones, Earth's movement, and Daylight Savings Time. The cause of jet lag is mentioned, explaining how sudden changes in time zones can disrupt sleep patterns. The amount of daylight at the tropics is also discussed, noting that countries there receive the same amount of daylight consistently. Additionally, the passage explains the reason for the time readjustment due to Daylight Savings Time. However, the passage does not mention why the British government refused Daylight Savings Time, making option D the correct answer.
People of Hispanic origin were on the North American continent centuries before settlers arrived
from Europe in the early 1600s and the thirteen colonies joined together to form the United
States in the late 1700s. The first census of the new nation was conducted in 1790, and counted about four million people, most of whom were white. Of the white citizens, more than 80%
traced their ancestry back to England. There were close to 700,000 slaves and about 60,000 "free Negroes". Only a few Native American Indians who paid taxes were included in the census count, but the total Native American population was probably about one million. By 1815, the population of the United States was 8.4 million. Over the next 100 years, the
country took in about 35 million immigrants, with the greatest numbers coming in the late 1800s and early 1900s. In 1882, 40,000 Chinese arrived, and between 1900 and 1907, there were more
than 30,000 Japanese immigrants. But by far, the largest numbers of the new immigrants were
from central, eastern, and southern Europe. An enormous amount of racial and ethnic assimilation has taken place in the United States. In 1908, play-write Israel Zangwill first used the term "melting pot" to describe the concept of a place where many races melted in a crucible and re-formed to populate a new land. Some years during the first two decades of the 20th century, there were as many as one million new
immigrants per year, an astonishing 1 percent of the total population of the United States.
In 1921, however, the country began to limit immigration, and the Immigration Act of 1924
virtually closed the door. The total number of immigrants admitted per year dropped from as many as a million to only 150,000. A quota system was established that specified the number of
immigrants that could come from each country. It heavily favored immigrants from northern and western Europe and severely limited everyone else. This system remained in effect until 1965, although after World War II, several exceptions were made to the quota system to allow in
groups of refugees.
Which of the following can be inferred from the passage?
- A. Preserving a developing 'American' culture was a major factor leading to the introduction of the quota system.
- B. Racial and ethnic assimilation did not occur as planned.
- C. Racial and ethnic tensions would have increased if the quota system had not been introduced.
- D. The quota system was introduced to limit population growth.
Correct Answer: A
Rationale: The correct answer is A. The passage discusses the implementation of the quota system in 1924 which heavily favored immigrants from northern and western Europe. This preference for specific regions suggests that preserving a developing 'American' culture, which was predominantly influenced by these regions, was a major factor leading to the introduction of the quota system. The passage does not indicate that racial and ethnic assimilation did not occur as planned, nor does it directly mention an increase in tensions if the quota system had not been introduced. Additionally, the quota system was not introduced to limit population growth but rather to control and regulate the influx of immigrants from different regions.
Linking San Francisco to Marin County in California, the Golden Gate Bridge is one of the most famous bridges in the world. The bridge crosses over a narrow strait which connects the Pacific Ocean to San Francisco Bay. Prior to the bridge, people traveled by ferry boat across the strait.
Although most people thought a bridge was necessary to expedite travel, some residents of the
bay area felt the risk of building the bridge was too great. Joseph Strauss believed that nothing was impossible, and dreams would never come to fruition if risks weren't taken. So, he decided to gather the best and brightest builders, architects, and workers to embark on the challenge of
building a bridge across the Golden Gate Strait. With safety nets in place, the construction began in 1937. Building the anchorages first, the
builders then move on to the towers on each end, and then to the three-foot thick cables to support the suspension bridge. Lastly, workers labored to complete the roadway which became
the most dangerous and treacherous part of the entire task. The builders had to keep the bridge
balance, so it wouldn't fall into the bay.
Today, over sixty-five years later, the bridge remains a life-line for the people of the San Francisco Bay Area.
What body of water does the Golden Gate Bridge cross?
- A. San Francisco Bay
- B. Pacific Ocean
- C. Marin Strait
- D. Golden Gate Strait
Correct Answer: D
Rationale: The Golden Gate Bridge crosses over the Golden Gate Strait, linking San Francisco to Marin County in California. The strait connects the Pacific Ocean to San Francisco Bay. It is essential to understand the specific geography of the area to correctly identify the body of water crossed by the bridge. Therefore, the correct answer is D, Golden Gate Strait.
Violence: Lately, studies have been done to decide whether a relationship exists between violence on television and mounting violence in the streets of the United States. More and better research is needed to assess fully the effects of exposure to violence on human behavior. However, early results seem to indicate that some people are influenced negatively by what they see on TV, especially young children. Since children born today, on an average, are exposed to seven hours of TV a day, some changes seem needed.
Consultants have advised network officials to reconsider certain policies if they wish to avoid the pitfalls of increased government regulations.
The theme of the article seems to be to
- A. persuade people to support censorship of television.
- B. inform people about the debate over TV violence.
- C. alarm people about the effects of television violence.
- D. persuade people to relax controls over TV programming.
Correct Answer: B
Rationale: Correct Answer: B (inform people about the debate over TV violence)
Rationale:
1. The passage discusses studies on the relationship between TV violence and real-life violence.
2. It mentions the need for more research to fully understand the effects of violence on behavior.
3. It emphasizes the negative influence of TV violence, especially on young children.
4. The passage concludes with a recommendation for network officials to reconsider policies.
5. Therefore, the theme is to inform people about the ongoing debate and concerns regarding TV violence.
Summary of Incorrect Choices:
A: The passage does not explicitly advocate for censorship of television.
C: While the passage discusses negative effects of TV violence, it does not aim to alarm people.
D: The passage does not suggest relaxing controls over TV programming; in fact, it hints at the need for changes.
Nokea