mildly elevated levels of thyroxine will do what to the heart rate

ATI TEAS 7

ATI TEAS Science Test

1. How will mildly elevated levels of thyroxine affect the heart rate?

A. Stop the heart rate
B. No effect
C. Decrease the heart rate
D. Increase the heart rate

Correct answer: D

Rationale: Mildly elevated levels of thyroxine will increase the heart rate. Thyroxine, a hormone produced by the thyroid gland, regulates metabolism. Elevated thyroxine levels can lead to increased metabolism, resulting in an elevated heart rate. Choice A is incorrect as mildly elevated thyroxine levels do not stop the heart rate. Choice B is incorrect because elevated thyroxine levels do have an effect on heart rate. Choice C is incorrect as elevated thyroxine levels typically lead to an increase rather than a decrease in heart rate.

2. Melatonin is a hormone produced by the pineal gland. What is its primary function?

A. Regulate blood pressure
B. Stimulate the digestive system
C. Control sleep-wake cycles
D. Maintain bone density

Correct answer: C

Rationale: Melatonin is primarily known for its role in controlling sleep-wake cycles. It is produced by the pineal gland in response to darkness, helping signal the body that it is time to sleep. Melatonin levels typically rise in the evening and stay elevated throughout the night, promoting sleep. Choices A, B, and D are incorrect as melatonin's primary function is not to regulate blood pressure, stimulate the digestive system, or maintain bone density. While melatonin may have some indirect effects on these functions, its main role lies in regulating the circadian rhythm and promoting a restful sleep cycle.

3. What is kwashiorkor, a protein deficiency disease, characterized by?

A. Muscle wasting
B. Night blindness
C. Scurvy
D. Rickets

Correct answer: A

Rationale: Kwashiorkor is a severe acute malnutrition condition resulting from insufficient dietary protein intake. It is characterized by symptoms such as edema, skin lesions, an enlarged liver with fatty infiltrates, and notably, muscle wasting. Muscle wasting occurs as the body breaks down muscle tissue to obtain essential amino acids for vital functions. Night blindness (option B) is associated with vitamin A deficiency, scurvy (option C) results from a lack of vitamin C, and rickets (option D) is caused by a deficiency in vitamin D, calcium, or phosphate.

4. Which of the following sentences is an example of a complex sentence structure?

A. Opening night for the performance was fast approaching, and stress levels were high.
B. Because my tea was cold, I heated it in the microwave.
C. She returned the laptop, the mouse, and the extra monitor.
D. I closed the door as the noise from the TV was too loud, but I could still hear it.

Correct answer: B

Rationale: A complex sentence consists of one independent clause and at least one dependent clause. In sentence B, 'Because my tea was cold' is the dependent clause, indicating that it cannot stand alone as a complete sentence. Choices A, C, and D do not contain a dependent clause along with an independent clause, making them incorrect. Choice A is a compound sentence with two independent clauses joined by a coordinating conjunction. Choice C is a compound sentence with a series of independent clauses, but lacks a dependent clause. Choice D is a compound-complex sentence with two independent clauses and a dependent clause.

5. After an unexpected rearrangement of their schedules, Thomas and his sister realize that they will have to squeeze in the film after 10 p.m. Given this new information, which cinema is the best option?

A. Twin Theatres
B. Reveler Cinema
C. Big Screen 14
D. Best Seat in The House

Correct answer: B

Rationale: Since Thomas and his sister have to squeeze in the film after 10 p.m., they need to watch the film later in the evening. Among the options, Reveler Cinema offers showtimes after 10 p.m. with a showing at 7:15 p.m., making it the best choice. Twin Theatres, Big Screen 14, and Best Seat in The House do not have showtimes after 10 p.m., making Reveler Cinema the most suitable option for the siblings to catch a film at that time.