coronary arteries are responsible for

ATI TEAS 7

TEAS Test 7 science

1. What is the primary function of coronary arteries?

A. Delivering oxygenated blood throughout the body.
B. Supplying oxygenated blood to the heart muscle itself.
C. Carrying deoxygenated blood back to the heart.
D. Regulating blood pressure through vasoconstriction and vasodilation.

Correct answer: B

Rationale: The primary function of coronary arteries is to supply oxygenated blood to the heart muscle itself. The heart is a muscle that needs a constant supply of oxygen and nutrients to function properly. Coronary arteries branch off the aorta and specifically deliver oxygenated blood to the heart muscle, ensuring its proper function. Choice A is incorrect because coronary arteries do not deliver blood throughout the entire body but specifically to the heart. Choice C is incorrect as coronary arteries carry oxygenated blood away from the heart. Choice D is incorrect as the primary function of the coronary arteries is not to regulate blood pressure but rather to provide oxygenated blood to the heart muscle.

2. What is the most effective way to rewrite the following sentence: She is saying that some of the students are wearing to school is being distracting and inappropriate?

A. Some of the outfits students wear to school, she is saying, are distracting and not appropriate.
B. The outfits are distracting and inappropriate, she says, that students wear to school.
C. She says that some of the outfits that students wear to school are distracting and inappropriate.
D. She says that it is distracting and inappropriate that students wear outfits to school.

Correct answer: C

Rationale: The most effective way to rewrite the sentence is, 'She says that some of the outfits that students wear to school are distracting and inappropriate.' This choice corrects the sentence structure by placing the subject ('Some of the outfits') before the verb ('are'), making it clearer and more grammatically correct. Choice A is incorrect as it places the subject after the verb, which disrupts the sentence structure. Choice B is incorrect as it changes the meaning of the sentence by placing the verb before the subject. Choice D is incorrect as it creates a confusing sentence structure by using 'that' redundantly.

3. Which organ's primary role is the production of bile and other metabolic functions such as blood sugar regulation and detoxification?

A. Gallbladder
B. Pancreas
C. Liver
D. Stomach

Correct answer: C

Rationale: The correct answer is the liver. The liver is responsible for producing bile, regulating blood sugar levels, and detoxifying the blood. Bile produced by the liver is stored in the gallbladder. The pancreas primarily functions in digestion by producing enzymes and insulin, while the stomach is mainly involved in breaking down food through the secretion of gastric juices.

4. Which of the following sentences correctly uses a second-person narrative voice?

A. You go to the window because someone is knocking insistently on the front door.
B. I go to the window because someone is knocking on the door.
C. He goes to the window because someone is knocking.
D. They go to the window because someone is knocking.

Correct answer: A

Rationale: The correct answer is A because it correctly uses the second-person narrative voice by addressing the reader as 'you,' directly involving them in the action. Choices B, C, and D use first-person ('I'), third-person singular ('he'), and third-person plural ('they') perspectives, respectively, which do not align with a second-person narrative voice. It is essential to identify the perspective being used in a sentence to determine if it matches the criteria specified in the question.

5. What controls the involuntary, rhythmic contractions of the heart muscle?

A. Lungs
B. Brain
C. Spinal cord
D. Sinoatrial node (located within the heart)

Correct answer: D

Rationale: The correct answer is D: Sinoatrial node (located within the heart). The involuntary, rhythmic contractions of the heart muscle are controlled by a specialized group of cells located within the heart called the sinoatrial node (SA node). The SA node acts as the heart's natural pacemaker, producing electrical impulses that regulate the heart rate and synchronize the contractions of the heart muscle. Choices A, B, and C (Lungs, Brain, Spinal cord) are not responsible for directly influencing the rhythmic contractions of the heart muscle.