regular exercise is beneficial for the muscular system by

ATI TEAS 7

ATI TEAS 7 science review

1. How is the muscular system benefited by regular exercise?

A. Decreasing muscle mass
B. Improving muscle strength and endurance
C. Making muscles less flexible
D. Increasing the risk of muscle tears

Correct answer: B

Rationale: Regular exercise is beneficial for the muscular system by improving muscle strength and endurance. Exercise helps to build and maintain muscle mass, increase muscle strength, and enhance muscle endurance. It does not decrease muscle mass, make muscles less flexible, or increase the risk of muscle tears when done properly. Therefore, the correct answer is improving muscle strength and endurance, as it aligns with the positive effects of regular exercise on the muscular system.

2. Which statement from the passage best supports the conclusion that taking notes and recording audio during an interview is a good practice for journalists?

A. Journalists often use a recording device to capture the audio transcript of an interview with a subject.
B. Relying on a recording device is not without troubles, however.
C. As a result, a portion of an interview can be lost without any way to reclaim it.
D. This dual-note method means that most of the time, a wise journalist has two good resources to use as he or she writes the article draft.

Correct answer: D

Rationale: The statement about the dual-note method best supports the conclusion that taking notes and recording audio is a good practice. It highlights the advantage of having two resources - notes and audio recordings - which provide comprehensive coverage of the interview. Choice A simply mentions the use of a recording device but does not emphasize the benefits of combining it with note-taking. Choices B and C focus on the limitations or potential issues with using recording devices, which do not promote the practice as positively as Choice D.

3. In a study measuring the average hours worked per week by different types of hospital staff (such as nurses and physicians), what are the dependent and independent variables?

A. The dependent variable is Nurses. The independent variable is Physicians.
B. The dependent variable is Physicians. The independent variable is Nurses.
C. The dependent variable is Hospital Staff. The independent variable is Average hours worked per week.
D. The dependent variable is Average hours worked per week. The independent variable is Hospital Staff.

Correct answer: D

Rationale: In this study, the dependent variable is the 'Average hours worked per week,' as it relies on the different types of 'Hospital Staff' (the independent variable). The amount of time worked per week varies based on the category of staff being considered. Therefore, the correct choice is D. Choices A and B incorrectly assign the dependent and independent variables to specific staff categories (Nurses and Physicians), which are actually different elements within the study. Choice C incorrectly defines the dependent variable as 'Hospital Staff,' when in fact, it is the 'Average hours worked per week' that is dependent on the type of staff.

4. Elijah drove 45 miles to his job in an hour and ten minutes in the morning. On the way home in the evening, however, the traffic was much heavier, and the same trip took an hour and a half. What was his average speed in miles per hour for the round trip?

A. 30
B. 45
C. 36
D. 40

Correct answer: A

Rationale: To find the average speed for the round trip, we calculate the total distance and total time traveled. The total distance for the round trip is 45 miles each way, so 45 miles * 2 = 90 miles. The total time taken for the morning trip is 1 hour and 10 minutes (1.17 hours), and for the evening trip is 1.5 hours. Therefore, the total time for the round trip is 1.17 hours + 1.5 hours = 2.67 hours. To find the average speed, we divide the total distance by the total time: 90 miles / 2.67 hours ≈ 33.7 miles per hour. The closest option is A, 30 miles per hour, making it the correct answer. Choice B (45) is the total distance for the round trip, not the average speed. Choices C (36) and D (40) are not derived from the correct calculations and do not represent the average speed for the round trip.

5. When is work done on an object?

A. Only when the object's velocity changes
B. Only when a force is applied to the object
C. Whenever there is a force exerted on the object causing displacement
D. Only when the object is lifted vertically

Correct answer: C

Rationale: Work is done on an object whenever a force causes displacement in the object's position. According to the work-energy principle, work is calculated as the force applied multiplied by the distance the object moves in the direction of the force. Therefore, work can occur whenever there is a force exerted on the object resulting in displacement, regardless of whether the object's velocity changes or it is lifted vertically. Choice A is incorrect because work can be done even without a change in velocity. Choice B is incorrect as work requires both force and displacement, not just the application of force. Choice D is incorrect because work is not limited to vertical lifting; it can happen in any direction as long as there is a force causing displacement.