Free TEAS Practice Test [2024]

The correct answer is (C).

Let's break down why this is the case and why the other options are functions of the respiratory system:

A. Gas exchange: This is a primary function of the respiratory system. It occurs in the alveoli of the lungs, where oxygen from inhaled air is transferred to the blood, and carbon dioxide is removed from the blood and exhaled.

B. Regulation of blood pH: The respiratory system plays a crucial role in maintaining blood pH. By controlling the rate and depth of breathing, it can adjust the amount of carbon dioxide in the blood, which affects blood pH.

D. Filtration of inspired air: The respiratory system, particularly the nose and upper airways, filters, warms, and humidifies the air we breathe before it reaches the lungs.

C. Disposal of toxins: While the respiratory system can expel some volatile substances (like alcohol on the breath), it's not primarily responsible for toxin disposal. This function is mainly carried out by the liver and kidneys.

Remember the respiratory system is responsible for gas exchange, pH regulation, and air filtration. However, toxin disposal is primarily handled by the liver.

The correct answer is (C). 

Let's break down why this is correct and why the other options are incorrect:

C. This statement is correct because:

Opening sodium channels allows sodium ions (Na+) to rush into the cell, making the inside of the cell more positive and thus depolarizing the membrane.

Opening potassium channels allows potassium ions (K+) to flow out of the cell, making the inside of the cell more negative and thus repolarizing the membrane.

A. This is incorrect because it reverses the roles of sodium and potassium channels.

B. This is incorrect because, while calcium channels can contribute to depolarization in some cells, sodium channels are primarily responsible for the rapid depolarization phase of the action potential in neurons. Also, sodium channels do not repolarize the membrane.

DThis is incorrect because opening potassium channels does repolarize the membrane, but opening calcium channels typically contributes to depolarization, not repolarization.

The correct answer is (C). 
Let's break down why this is the most appropriate answer and why the other options are less suitable:

C. To emphasize the deadline: This is correct because underlining is often used to draw attention to important information in a text. In this case, the deadline (Friday, July 25) is a crucial piece of information that the writer wants to ensure readers don't miss.

A. To indicate a title is being used: This is incorrect because there is no title present in the given text. The underlined portion is a date, not a title.

B. To illustrate the relevant timeline: While the underlined text does contain a date, which is part of a timeline, the purpose of the underlining is not to illustrate a timeline but to highlight a specific, important date.

D. Dates are always underlined: This is incorrect as a general rule. Dates are not always underlined in writing. Underlining is used selectively for emphasis or other specific purposes.

Correct Answer: A. Definition 1

In this medical context, "articulations" refers to the joints of the patient's limbs.

• Definitions 2, 3, and 4 don't fit as well in this context:
• Definition 2 is too vague for this specific medical scenario.
• Definition 3 relates to speech, which isn't relevant here.
• Definition 4 is about dental work, which doesn't align with the examination of limbs.

The correct answer is (D)12.1%, 121/1000

Let's break down why this is correct:

• 0.121 as a percentage: 0.121 × 100 = 12.1%
• 0.121 as a fraction: 0.121 = 121/1000 (because there are three decimal places)

Let's examine why the other options are incorrect:

A. 1.21%, 121/100 - Both parts are incorrect. 1.21% is 0.0121, not 0.121. 121/100 is 1.21, not 0.121.

B. 1.21%, 121/1000 - The percentage is incorrect (should be 12.1%), though the fraction is correct.

C. 12.1%, 121/100 - The percentage is correct, but the fraction is wrong (121/100 = 1.21, not 0.121).

The correct answer is (D). 

determine how much feed the farmer needs to buy each week, we need to first calculate the daily feed requirement and then extend it to a weekly requirement.

Daily Feed Calculation:

• Each cow eats 24 pounds of feed per day.
• Each pig eats 7 pounds of feed per day.

If the farmer has xxx cows, the total feed for the cows per day is 24x24x24x pounds.

If the farmer has yyy pigs, the total feed for the pigs per day is 7y7y7y pounds.

Therefore, the total daily feed for both cows and pigs is 24x+7y24x + 7y24x+7y pounds.

Weekly Feed Calculation:

• Since there are 7 days in a week, we multiply the daily feed by 7 to find the weekly requirement.
• The weekly feed for the cows is 7×24x=168x7 \times 24x = 168x7×24x=168x pounds.
• The weekly feed for the pigs is 7×7y=49y7 \times 7y = 49y7×7y=49y pounds.
• Combining these, the total weekly feed is 168x+49y168x + 49y168x+49y pounds.
• Thus, the farmer needs to buy 168x+49y168x + 49y168x+49y pounds of feed each week.

Calculate daily feed: (24x + 7y) pounds Weekly feed: 7(24x + 7y) = 168x + 49y pounds

The correct answer is (D).

The phrase "a house" is misplaced in the sentence. The sentence currently reads, "Some say that buying today is harder than finding the love of your life a house," which incorrectly implies that you are trying to find a house for the love of your life.

To correct the sentence, "a house" should be placed immediately after "buying" to clearly show what is being bought. The correct sentence should be:
"Some say that buying a house today is harder than finding the love of your life."

Answer & Explanation

The correct answer is (C).
The two parts of the sentence are meant to contrast with each other. The first part states that it is rare to see green turtles, while the second part mentions that they can be found during the summer. The word "however" is used to introduce a statement that contrasts with or seems to contradict something that has been said previously. Therefore, "however" is the best word to complete the sentence. The sentence should read:
"It is very rare to see green turtles off the coast of California; however, during the summer they can be found among the rocks."