Simulasi TOEFL Satu (Jumat, 13 April 2018)

1. Text 4 (Number 37 - 47) Diabetes Mellitus is a disorder of carbohy-drate metabolism resulting from insufficient production of insulin or reduced sensitivity to insulin. A polypeptide hormone, insulin is synthesized in the pancreas and is necessary for normal utilization of glucose by most cells in the body. People with diabetes suffer an inhibition in the normal ability of body cells to use glucose, which results in in-creased blood sugar levels. As more glucose accumulates in the blood, excess levels of sugar are excreted in the urine. There are two varieties of the disease, Type 1 and Type 2. The two types were previously designated by Roman numerals, but now Arabic numerals are used; for example, Type

now known as Type 2. Type 1 was for-merly referred to as juvenile onset diabetes, but it can occur at any age. In Type 1 dia-betes, insulin is not secreted by the pancreas, so it must be injected. Th type of diabetes is most often seen in people whose parents, siblings, or other close relatives are affected by the disease.

Type 2, representing 90 percent of all dia-betes, used to be called adult onset diabetes, but it can also occur at any age. It results from sluggish pancreatic insulin secretion and tissue resistance to secreted insulin, which is complicated by subtle changes in the secretion of insulin by the beta cells. It is generally controlled by dietary restriction. People who are at risk for this type include: women who have delivered a baby of 9 pounds or more or have been diagnosed with gestational diabetes; people over 45 years of age, particularly those of African-American, Asian-American, Hispanic, Native American, or Pacific Islander heritage; those who have a history of diabetes in the family; those who are obese; and those with high blood pres-sure, a high triglyceride level, or high blood sugar. A person affected with diabetes may have no symptoms at all. Or, he or she may experi-ence one or more of the following common symptoms: fatigue; increased urination and thirst; hunger; blurred vision; weight loss; repeated infections of the skin, genitals, or feet; or itching and dizziness. The diagnosis is reached by testing the blood sugar. If the blood sugar is over 126 milligrams per deciliter (mg/dl) after an 8-hour overnight fast, or over 200 mg/dl at other times of the day, the patient is diagnosed as having the disease.

Diabetes is a formidable illness that can re-sult in serious complications, including heart attack, blindness, kidney failure, and loss of circulation to the lower extremities (feet and legs). This loss of circulation can lead to am-putation of the affected areas. Prior to the isolation of insulin in the 1920s, rapid death was common among diabetes sufferers. Now, the illness can be managed and those affected can lead a long, fairly normal life with proper medical attention and proper at-tention to personal care. Patients should fol-low nutrition plans designed to help them reach and maintain normal body weight and to limit their intake of carbohydrates and fats. They should also exercise regularly, which enhances the movement of glucose into muscle cells and inhibits the increase in glucose in the blood. 37.) Insulin is ...

a hormone.

a drug.

a disease.

an organ.

A: a hormone. The second sentence of paragraph one states: A polypeptide
hormone, insulin is synthesized . . . . The sentence begins with an appositive,
and the phrase following it refers to the same subject.

Explanation

A: a hormone. The second sentence of paragraph one states: A polypeptide
hormone, insulin is synthesized . . . . The sentence begins with an appositive,
and the phrase following it refers to the same subject.

2. Text 2 (Number 12 - 24) Scientists have experimented with a new procedure for alleviating the damage caused by strokes. Strokes are frequently caused by a blood clot lodging in the tree of arteries in the head, choking the flow of blood. Some brain cells die as a direct result of the stroke, but others also die over several hours be-cause the proteins spilling out of the first cells that die trigger a chemical chain reac-tion that kills the neighboring cells. The current method of reducing the amount of damage is to give a clot dissolver, known as TPA, as soon as possible. But generally TPA is not given to the patient until he or she reaches the hospital, and it still does not im-mediately stop the damage. The new technology, still in the research stage, involves chilling the area or the entire patient. It is already known that when an or-gan is cooled, damage is slowed. This is why sometimes a person who has fallen into an icy pond is not significantly harmed after be-ing warmed up again. The biggest issue is the method of cooling. It is not feasible to chill the head alone. Doctors have chilled the en-tire body by wrapping the patient in cold ma-terials, but extreme shivering was a problem.

The new idea is to cool the patient from the inside out. Several companies are studying the use of cold-tipped catheters, inserted into the artery in the groin and threaded up to the inferior vena cava, which is a large vein that supplies blood to the abdomen. The catheter is expected to cool the blood that flows over it, thus allowing cooler blood to reach the area of the stroke damage. It is not expected that the cooling will be substantial, but even a slight decrease in temperature is thought to be helpful. In effect, the patient is given a kind of forced hypothermia. And doctors believe it is important to keep the patient awake so that they can converse with the patient in order to ascertain mental condition. Studies continue to determine the most ef-fective and least damaging means of cooling the patient in order to reduce this damage. 12.) The word alleviating in the first sentence is closest in meaning to ...

reducing.

devastating.

causing.

increasing.

A: reducing. Generally the word means “avoiding” or “making not necessary.”
Here, the closest definition is reducing.

Explanation

A: reducing. Generally the word means “avoiding” or “making not necessary.”
Here, the closest definition is reducing.

3. The word recurrent in the last sentence of paragraph one means most nearly the same as ...

moving.

recurring.

stagnant.

warm.

The word "recurrent" in the last sentence of paragraph one means that something is happening repeatedly or happening again. It is similar in meaning to "recurring," which means something that occurs repeatedly or happens over and over again.

Explanation

The word "recurrent" in the last sentence of paragraph one means that something is happening repeatedly or happening again. It is similar in meaning to "recurring," which means something that occurs repeatedly or happens over and over again.

4. The word excreted in the last sentence of paragraph one means most nearly the same as

eliminated.

ingested.

utilized.

inserted.

A: eliminated. This means that sugar leaves the body through the urine.

Explanation

A: eliminated. This means that sugar leaves the body through the urine.

5. According to the passage, what causes a stroke?

A blood clot sticking in an area of the brain

Low blood flow

Hot blood

A patient choking on food

A: A blood clot sticking in an area of the brain.

Explanation

A: A blood clot sticking in an area of the brain.

6. The word species in the first sentence is closest in meaning to

mates.

varieties.

killers.

enemies.

B: varieties.

Explanation

B: varieties.

7. The passage implies that bees can be found in each of the following parts of the world except

Africa.

China.

Europe.

Antarctica.

D: Antarctica. The first sentence of the passage states that bees can be found
in every part of the world except the northernmost and southernmost areas.

Explanation

D: Antarctica. The first sentence of the passage states that bees can be found
in every part of the world except the northernmost and southernmost areas.

8. According to the passage, insulin is produced

in the pancreas.

in tissue.

in hormones.

in glucose.

A: in the pancreas. The passage states that the pancreas is the site of insulin
production.

Explanation

A: in the pancreas. The passage states that the pancreas is the site of insulin
production.

9. The word they in the second sentence of paragraph two refers to ...

salamander embryos.

young.

forms of algae

sunlight

C: forms of algae.

Explanation

C: forms of algae.

10. Text 5 (Number 48 - 50) Hummingbirds are small, often brightly col-ored birds of the family Trochilidae that live exclusively in the Americas. About 12 species are found in North America, but only the ruby-throated hummingbird breeds in eastern North America and is found from Nova Scotia to Florida. The greatest variety and number of species are found in South America. Another hummingbird species is found from southeastern Alaska to northern California. Many hummingbirds are minute. But even the giant hummingbird found in western South America, which is the largest known hummingbird, is only about 8 inches long and weighs about two-thirds of an ounce. The smallest species, the bee hummingbird of Cuba and the Isle of Pines, measures slightly more than 5.5 centimeters and weighs about two grams. Hummingbirds' bodies are compact, with strong muscles. They have wings shaped like blades. Unlike the wings of other birds, hummingbird wings connect to the body only at the shoulder joint, which allows them to fly not only forward but also straight up and down, sideways, and backward. Because of their unusual wings, hummingbirds can also hover in front of flowers so they can suck nectar and find insects. The humming-bird's bill, adapted for securing nectar from certain types of flowers, is usually rather long and always slender, and it is curved slightly downward in many species.

The hummingbird's body feathers are sparse and more like scales than feathers. The unique character of the feathers produces brilliant and iridescent colors, resulting from the refraction of light by the feathers. Pigmentation of other feathers also con-tributes to the unique color and look. Male and female hummingbirds look alike in some species but different in most species; males of most species are extremely colorful. The rate at which a hummingbird beats its wings does not vary, regardless of whether it is flying forward, flying in another direction, or merely hovering. But the rate does vary with the size of the bird — the larger the bird, the lower the rate, ranging from 80 beats per second for the smallest species to 10 times per second for larger species. Researchers have not yet been able to record the speed of the wings of the bee humming-bird but imagine that they beat even faster. Most hummingbirds, especially the smaller species, emit scratchy, twittering, or squeaky sounds. The wings, and sometimes the tail feathers, often produce humming, hissing, or popping sounds, which apparently function much as do the songs of other birds. 48.) According to the passage, where are hummingbirds found?

Throughout the world

In South America only

In North America only

In North and South America

D: In North and South America. This is explained in the first paragraph.

Explanation

D: In North and South America. This is explained in the first paragraph.

11. In what way does the reading imply that bees are useful in nature?

They pollinate fruit and vegetable plants.

They make marvelous creations from wax.

They kill the dangerous drones.

They create storage spaces.

A: They pollinate fruit and vegetable plants. The reading passage states that
when bees carry pollen from one plant to the next, they fertilize the flowers.

Explanation

A: They pollinate fruit and vegetable plants. The reading passage states that
when bees carry pollen from one plant to the next, they fertilize the flowers.

12. The word obese in the last sentence of paragraph three means most nearly the same as

severely overweight.

diabetic.

suffering from high blood pressure.

active.

A: severely overweight.

Explanation

A: severely overweight.

13. The word shivering in the last sentence of the third paragraph is closest in meaning to ...

shaking.

delirious.

sick.

dying.

A: shaking. To shiver is to shake with cold.

Explanation

A: shaking. To shiver is to shake with cold.

14. The word simultaneously in the fourth sentence is closest in meaning to

stubbornly.

concurrently.

skillfully.

diligently.

B: concurrently, which means happening at the same time.

Explanation

B: concurrently, which means happening at the same time.

15. The author indicates that the ruby-throated hummingbird is found

throughout North America.

in California.

in South America.

in the eastern part of North America.

D: in the eastern part of North America. This is explained in the first
paragraph.

Explanation

D: in the eastern part of North America. This is explained in the first
paragraph.

16. All of the following are characteristic of a honeycomb except

it contains hexagonal sections.

it is made of honey.

it is made of wax.

it is impermeable

B: it is made of honey. The author states the honeycomb is made of wax, has
six-sided compartments, and is waterproof.

Explanation

B: it is made of honey. The author states the honeycomb is made of wax, has
six-sided compartments, and is waterproof.

17. The word diverse in the third sentence means most nearly the same as ...

distinct

living

numerous

primitive

A: distinct. Diverse means “different.”

Explanation

A: distinct. Diverse means “different.”

18. The author implies that hypothermia is caused by

the body becoming cold.

a stroke

the body becoming warm.

drugs.

A: the body becoming cold. Hypothermia means the condition of the body
when exposed to extreme cold.

Explanation

A: the body becoming cold. Hypothermia means the condition of the body
when exposed to extreme cold.

19. The word it in the fourth sentence of paragraph two refers to

insulin.

Type 1 diabetes.

Type 2 diabetes.

pancreas.

A: insulin.

Explanation

A: insulin.

20. The word murky in the first sentence of the second paragraph means most nearly the same as ...

clear.

cloudy.

cold.

life-producing. life-producing. life-producing.

B: cloudy. This means the same as “not clear.”

Explanation

B: cloudy. This means the same as “not clear.”

21. According to the passage, a hive is

a type of honey.

a nest.

a type of bee.

a storage space.

B: a nest. The passage states: Bees live in a structured environment and social
structure within a hive, which is a nest with storage space for the honey.

Explanation

B: a nest. The passage states: Bees live in a structured environment and social
structure within a hive, which is a nest with storage space for the honey.

22. Text 1 (Number 1 - 11)

Even a muddy pond contributes to the ecosystem that affects the environment. A vernal or springtime pool is only a few feet deep and lasts only from March until mid-summer but yields a considerable number of diverse life forms. Like all of nature, there are predators and victims, and a particular living being may be one or the other, de-pending on its age and characteristics. One may find masses of spotted salamander eggs floating just under the surface of the pond, left behind by adults who entered the pond early in the season before predators arrived. Other amphibians and reptiles return to the recurrent pond year after year to reproduce, as their ancestors have done for years. Various forms of algae grow well in the murky water, if there is sufficient sunlight. They in turn produce and transmit oxygen to the sala-mander embryos and other young that are not yet able to survive outside of water. Diving beetles feast on eggs and larvae deposited in the pond by the salamanders and other am-phibians that have called it home. Tadpoles are born in the late spring and feed on the algae. The pond also invites wood frogs staking their territory and courting potential mates, calling as loud as quacking ducks. By the end of the short season, the pond dries to spongy mud and then dries further, becoming covered with leaves and debris, until the following spring when the process repeats itself. 1.) The word vernal in the second sentence means most nearly the same as ...

springtime

pool

deep

transitory

springtime, jelas pada kalimat tersebut tertulis "A vernal or springtime . . . "

Explanation

springtime, jelas pada kalimat tersebut tertulis "A vernal or springtime . . . "

23. Which sentence in the first paragraph indicates that a young life form might be prey to an older life form?

B: Like all of nature, there are predators and victims, and a particular living
being may be one or the other, depending on its age and characteristics. This
sentence means that something that lives in the pond may sometimes kill
older or younger victims and may sometimes be a victim itself.

Explanation

B: Like all of nature, there are predators and victims, and a particular living
being may be one or the other, depending on its age and characteristics. This
sentence means that something that lives in the pond may sometimes kill
older or younger victims and may sometimes be a victim itself.

24. Text 3 (Number 25 - 37)

Bees, classified into over 10,000 species, are insects found in almost every part of the world except the northernmost and southern-most regions. One commonly known species is the honeybee, the only bee that produces honey and wax. Humans use the wax in mak-ing candles, lipsticks, and other products, and they use the honey as a food. While gathering the nectar and pollen with which they make honey, bees are simultaneously helping to fertilize the flowers on which they land. Many fruits and vegetables would not survive if bees did not carry the pollen from blossom to blossom. Bees live in a structured environment and social structure within a hive, which is a nest with storage space for the honey. The differ-ent types of bees each perform a unique function. The worker bee carries nectar to the hive in a special stomach called a honey stomach. Other workers make beeswax and shape it into a honeycomb, which is a water-proof mass of six-sided compartments, or cells. The queen lays eggs in completed cells. As the workers build more cells, the queen lays more eggs. All workers, like the queen, are female, but the workers are smaller than the queen. The male honeybees are called drones; they do no work and cannot sting. They are devel-oped from unfertilized eggs, and their only job is to impregnate a queen. The queen must be fertilized in order to lay worker eggs. During the season when less honey is available and the drone is of no further use, the workers block the drones from eating the honey so that they will starve to death. 25.) Which of the following is the best title for this reading?

Which of the following is the best title for this reading? The Many Species of Bees

The Useless Drone

The Honeybee — Its Characteristics and Usefulness

Making Honey

C: The Honeybee — Its Characteristics and Usefulness. A is too broad and
the B and D too narrow.

Explanation

C: The Honeybee — Its Characteristics and Usefulness. A is too broad and
the B and D too narrow.

25. According to the passage, the drone

collects less honey than workers.

mates with the queen and has no other purpose.

comes from eggs fertilized by other drones.

can be male or female.

B: mates with the queen and has no other purpose. The author states: The
male honeybees are called drones . . . their only job is to impregnate a queen.

Explanation

B: mates with the queen and has no other purpose. The author states: The
male honeybees are called drones . . . their only job is to impregnate a queen.

26. The word minute in the second paragraph is closest in meaning to

extremely tiny.

extremely fast.

unique.

organized.

A: extremely tiny.

Explanation

A: extremely tiny.

27. The word previously in the second paragraph means most nearly the same as

occur.

formerly.

designated.

used.

B: formerly. Previously and formerly mean the same thing.

Explanation

B: formerly. Previously and formerly mean the same thing.

28. The word its in the fifth sentence refers to ...

predator

pond

living being

nature

C: living being. The sentence states: Like all of nature, there are predators
and victims, and a particular living being may be one or the other, depending
on its age and characteristics.

Explanation

C: living being. The sentence states: Like all of nature, there are predators
and victims, and a particular living being may be one or the other, depending
on its age and characteristics.

29. What is a suitable title for this passage?

Treatment of Diabetes

An Overview of Diabetes

Juvenile Diabetes — a Killer

How to Diagnose Diabetes

B: An Overview of Diabetes. The other answers are too particular, whereas
the article is general in nature.

Explanation

B: An Overview of Diabetes. The other answers are too particular, whereas
the article is general in nature.

30. Which of the following does the author imply in the first two sentences of paragraph two?

The life forms in the pool live in water their entire lives.

Some of the life forms live in water first and later on land.

The life forms found in the pool do not require oxygen to live.

Algae is strictly a food source.

B: Some of the life forms live in water first and later on land. The sentence
states that the forms of algae produce and transmit oxygen to the salamander
embryos and other young that are not yet able to survive outside of water. By
saying that the embryos and other young are not yet able means that at some
time they will be able to survive outside of water.

Explanation

B: Some of the life forms live in water first and later on land. The sentence
states that the forms of algae produce and transmit oxygen to the salamander
embryos and other young that are not yet able to survive outside of water. By
saying that the embryos and other young are not yet able means that at some
time they will be able to survive outside of water.

31. The word yields in the third sentence means most nearly the same as . . .

produces

contributes to

kills

harms

The word "yields" in the third sentence means "produces" because it refers to the result or output of something. When something yields, it produces or generates a particular outcome or result.

Explanation

The word "yields" in the third sentence means "produces" because it refers to the result or output of something. When something yields, it produces or generates a particular outcome or result.

32. The word substantial in the fifth paragraph is closest in meaning to

considerable.

slight.

unsubstantiated.

effective.

A: considerable. Both words mean “to a great degree.”

Explanation

A: considerable. Both words mean “to a great degree.”

33. According to the passage, honey is carried to the hive in a honey stomach by the

queens

drones.

males.

workers.

D: workers. This is clearly stated in the passage in the sentence: The worker
bee carries nectar to the hive in a special stomach called a honey stomach.

Explanation

D: workers. This is clearly stated in the passage in the sentence: The worker
bee carries nectar to the hive in a special stomach called a honey stomach.

34. The word sluggish in the third paragraph means most nearly the same as

accelerated.

excreted.

normal.

slow.

D: slow.

Explanation

D: slow.

35. Which sentence in the first paragraph indicates that life forms continue to act in the same way as the same life forms did previously?

D: Other amphibians and reptiles return to the recurrent pond year after year
to reproduce, as their ancestors have done for years.

Explanation

D: Other amphibians and reptiles return to the recurrent pond year after year
to reproduce, as their ancestors have done for years.

36. What is the passage mainly about?

Causes and effects of strokes

New pharmaceutical methods for reducing stroke damage that are being researched

A new method of cooling the body to reduce stroke damage that is being researched

The dangers of cooling the body

C: A new method of cooling the body to reduce stroke damage that is being
researched. B is incorrect because it refers to use of drugs.

Explanation

C: A new method of cooling the body to reduce stroke damage that is being
researched. B is incorrect because it refers to use of drugs.

37. The author implies that

bees are unnecessary in the food chain.

drones are completely dispensable.

the queen can be a worker.

drones are never females.

D: drones are never females. Drones impregnate the queen, so they must be
male.

Explanation

D: drones are never females. Drones impregnate the queen, so they must be
male.

38. The author distinguishes between Type 1 and Type 2 diabetes to describe how

one affects only juveniles and the other affects only adults.

the symptoms and treatment are different.

the two types are extremely similar to each other.

the understanding of the disease has improved over time.

B: the symptoms and treatment are different. The other answer choices do not
show why the author makes a distinction between the two types.

Explanation

B: the symptoms and treatment are different. The other answer choices do not
show why the author makes a distinction between the two types.

39. The word which in the fourth sentence refers to

fertilizer.

flowers.

honey.

bees.

B: flowers.

Explanation

B: flowers.

40. According to the passage, doctors prefer to keep the patient awake in order to

monitor vital signs with equipment.

watch the patient.

talk to the patient.

find out if the procedure is painful.

C: talk to the patient.

Explanation

C: talk to the patient.

41. What is the author's purpose stated in the first sentence: Even a muddy pond contributes to the ecosystem that affects the environment?

To explain that a vernal pool is very muddy

To describe how the vernal pool fits into the larger environmental picture

To explain that mud is important to the environment

To show how algae grows

The author's purpose stated in the first sentence is to describe how the vernal pool fits into the larger environmental picture. The mention of a muddy pond contributing to the ecosystem and affecting the environment suggests that the author wants to emphasize the importance of the vernal pool and its role in the overall environmental balance.

Explanation

The author's purpose stated in the first sentence is to describe how the vernal pool fits into the larger environmental picture. The mention of a muddy pond contributing to the ecosystem and affecting the environment suggests that the author wants to emphasize the importance of the vernal pool and its role in the overall environmental balance.

42. It can be inferred from the passage that

amputation is the most common treatment for diabetes.

Type 1 sufferers are generally not overweight.

the symptoms of diabetes are always severe.

too much insulin is secreted in Type 1 diabetes.

B: Type 1 sufferers are generally not overweight. The passage indicates that
Type 2 sufferers are often obese, but it does not mention obesity in regard to
Type 1 patients.

Explanation

B: Type 1 sufferers are generally not overweight. The passage indicates that
Type 2 sufferers are often obese, but it does not mention obesity in regard to
Type 1 patients.

43. The author describes a person falling into cold water in order to

evoke sympathy.

show that cooling a body does not necessarily harm it.

show how one who falls into cold water could also benefit from the internal chilling research.

describe the warming process.

B: show that cooling a body does not necessarily harm it.

Explanation

B: show that cooling a body does not necessarily harm it.

44. According to the passage, all of the following are true except that

some cells die immediately when a person has a stroke, and others die later.

cells die only as a direct result of the stroke

the protein from dead cells kills other cells.

TPA is effective in removing blood clots.

B: cells die only as a direct result of the stroke. This is really the opposite of
the first answer choice, which is the correct statement.

Explanation

B: cells die only as a direct result of the stroke. This is really the opposite of
the first answer choice, which is the correct statement.

45. The author implies that

the catheter is moved all the way to the brain.

the artery in the leg connects directly to the brain.

the goal is to chill the brain directly with the catheter.

C: the artery in the leg connects to the vena cava. The passage indicates that
the catheter is inserted only to the vena cava.

Explanation

C: the artery in the leg connects to the vena cava. The passage indicates that
the catheter is inserted only to the vena cava.

46. All of the following are correct except that

Type 2 diabetes is much more common than Type 1.

both types of diabetes are hereditary to some extent.

Type 2 results from a lack of secretion of insulin.

diabetes is treatable.

C: Type 2 results from a lack of secretion of insulin. This is not a correct
statement because that is the description of Type 1 diabetes. The passage
states that Type 2 results from sluggish . . . insulin secretion, not a lack of
secretion.

Explanation

C: Type 2 results from a lack of secretion of insulin. This is not a correct
statement because that is the description of Type 1 diabetes. The passage
states that Type 2 results from sluggish . . . insulin secretion, not a lack of
secretion.

47. It can be inferred from the reading that beeswax is

absorbent.

pliable.

complex in structure.

sweet

B: pliable. The passage states that workers make beeswax and shape it into a
honeycomb. If it can be shaped, it is pliable, or easy to mold.

Explanation

B: pliable. The passage states that workers make beeswax and shape it into a
honeycomb. If it can be shaped, it is pliable, or easy to mold.

48. According to the passage, the method of chilling from the inside out is being considered for all of the following reasons except ...

it is not possible to chill the head alone.

chilling from the inside out avoids shaking.

cold dissolves blood clots.

drugs are not helpful in stopping the chain reaction.

C: cold dissolves blood clots. Applying cold has certain benefits, but
nowhere is it stated that it dissolves the blood clots.

Explanation

C: cold dissolves blood clots. Applying cold has certain benefits, but
nowhere is it stated that it dissolves the blood clots.

49. In the passage, the author implies that

the internal chilling process has not been proven yet.

drug therapy properly addresses all the problems of stroke victims.

chilling the head alone is viable.

nothing is likely to reduce the chain reaction problem.

A: the internal chilling process has not been proven yet. The other answer
choices are statements made in the reading passage.

Explanation

A: the internal chilling process has not been proven yet. The other answer
choices are statements made in the reading passage.

50. When the author states that the catheter is threaded to the vena cava, the author means that

the catheter is sewn to the vena cava.

the catheter is inserted into the body at the vena cava area.

the catheter becomes attached to the vena cava because of the cold.

the doctor moves the catheter slowly through the artery to the vena cava.

D: the doctor moves the catheter slowly through the artery to the vena cava.
The author explains that the catheter is inserted in the groin area and moved
to the vena cava area. Threaded just means moved slowly along the vein towards
the destination.

Explanation

D: the doctor moves the catheter slowly through the artery to the vena cava.
The author explains that the catheter is inserted in the groin area and moved
to the vena cava area. Threaded just means moved slowly along the vein towards
the destination.