which of the following sentences uses a comma correctly

ATI TEAS 7

English and Language Usage TEAS

1. Which of the following sentences uses a comma correctly?

A. Let's eat Grandma!
B. Let's eat, Grandma!
C. Lets eat, Grandma!
D. Lets, eat Grandma!

Correct answer: B

Rationale: The correct answer is B: 'Let's eat, Grandma!' The comma is correctly used to separate the direct address 'Grandma' from the rest of the sentence. In choice A, there should be a comma after 'eat' to separate the direct address. Choice C is missing an apostrophe in 'Lets,' and there should be a comma after 'eat' to separate the direct address. Choice D incorrectly places a comma after 'Lets,' and there should be a comma after 'eat' to separate the direct address.

2. Why did Julia not return to work after the alarm?

A. She was embarrassed that she could not finish the work her boss asked for.
B. She was tired and wanted to go home.
C. She got stuck in traffic and could not get back to her office.
D. Her boss gave her the afternoon off.

Correct answer: C

Rationale: The most likely reason Julia did not return to work after the alarm is that she got stuck in traffic and could not get back to her office. The extract provides details about Julia's challenging morning, starting from being woken up early by lawn mowers, having a caffeine-free cup of coffee, facing traffic delays, arriving late at work, and receiving additional work from her boss. These events culminated in Julia deciding to leave after the fire alarm, indicating that being stuck in traffic was the primary reason for her absence. Choices A, B, and D are incorrect because there is no direct evidence in the provided extract to support them. Julia's actions suggest that her decision to leave was more related to external factors like traffic issues rather than internal feelings of embarrassment, tiredness, or being given time off by her boss.

3. Which of the following structures is responsible for preventing the backflow of blood from the left ventricle into the left atrium?

A. Aortic valve
B. Pulmonary valve
C. Tricuspid valve
D. Mitral valve

Correct answer: D

Rationale: The correct answer is D, the Mitral valve. The mitral valve, also known as the bicuspid valve, is situated between the left atrium and the left ventricle. Its primary function is to prevent the backflow of blood from the left ventricle into the left atrium during ventricular contraction. The other choices are incorrect because: A) The aortic valve prevents backflow from the aorta into the left ventricle. B) The pulmonary valve prevents backflow from the pulmonary artery into the right ventricle. C) The tricuspid valve prevents backflow from the right ventricle into the right atrium.

4. What is the main function of calcitonin, a hormone produced by the thyroid gland?

A. Stimulate metabolism and heat production
B. Increase calcium absorption from the intestines
C. Enhance bone growth and development
D. Lower blood calcium levels

Correct answer: D

Rationale: Calcitonin is a hormone produced by the thyroid gland that primarily functions to lower blood calcium levels. It achieves this by inhibiting bone breakdown and promoting calcium excretion by the kidneys. Therefore, the correct answer is D as it reflects the main role of calcitonin in calcium homeostasis. Choices A, B, and C are incorrect as they do not align with the primary function of calcitonin. Calcitonin does not stimulate metabolism and heat production (Choice A), increase calcium absorption from the intestines (Choice B), or enhance bone growth and development (Choice C).

5. Which of the following words is a synonym for avian in this passage?

A. Bird
B. Flying
C. Aerial
D. Plane

Correct answer: A

Rationale: The word 'avian' refers to birds, so the synonym is 'Bird.' In the provided passage, the term 'avian' is used to refer to birds, making 'Bird' the correct synonym. 'Flying' and 'Aerial' are related to the concept of flight but do not specifically refer to birds. 'Plane' refers to an aircraft and is not synonymous with 'avian' or 'bird.' Therefore, 'Bird' is the most appropriate choice as a synonym for avian in this context.