if the pressure in the pulmonary artery is increased above normal which chamber of the heart will be affected first

ATI TEAS 7

ATI TEAS Science Practice Test

1. If the pressure in the pulmonary artery is increased above normal, which chamber of the heart will be affected first?

A. The right atrium
B. The left atrium
C. The right ventricle
D. The left ventricle

Correct answer: C

Rationale: When the pressure in the pulmonary artery is increased above normal, the right ventricle of the heart will be affected first. The right ventricle is responsible for pumping blood into the pulmonary artery, which carries deoxygenated blood to the lungs for oxygenation. Increased pressure in the pulmonary artery can result in increased workload on the right ventricle as it tries to pump blood against higher resistance, leading to potential strain and dysfunction in the right ventricle. Choices A, B, and D are incorrect because the right ventricle is the chamber directly connected to the pulmonary artery, and it bears the immediate impact of any changes in pressure within this artery. The right atrium receives deoxygenated blood from the body and the left atrium receives oxygenated blood from the lungs, while the left ventricle pumps oxygenated blood to the body and the right ventricle pumps deoxygenated blood to the lungs.

2. Which property of a substance refers to its ability to undergo a chemical change and form new substances?

A. Density
B. Mass
C. Reactivity
D. Volume

Correct answer: C

Rationale: Reactivity is the property of a substance that describes its ability to undergo a chemical change and form new substances through chemical reactions. Density, mass, and volume are physical properties of a substance and do not directly relate to its ability to undergo chemical changes. Density is the mass of a substance per unit volume, mass is the amount of matter present, and volume is the amount of space occupied by the substance. Reactivity specifically deals with how likely a substance is to engage in chemical reactions. Therefore, the correct answer is C - Reactivity.

3. How many kilometers is 4382 feet?

A. 1.336 kilometers
B. 14.376 kilometers
C. 1.437 kilometers
D. 13.336 kilometers

Correct answer: A

Rationale: To convert feet to kilometers, you need to divide the number of feet by 3280.84 (the number of feet in a kilometer). Therefore, 4382 feet is equal to 4382/3280.84 ≈ 1.336 kilometers. Choice B, 14.376 kilometers, is incorrect as it seems to be a miscalculation. Choice C, 1.437 kilometers, is also incorrect, as it is slightly off from the correct conversion. Choice D, 13.336 kilometers, is significantly higher than the correct answer and does not align with the conversion factor.

4. Which of the following is a correctly punctuated simple sentence?

A. Leah and Jerry spent the last few hours in the garden smelling the roses and tulips.
B. Leah stopped to smell the roses in the garden, but her allergies made her eyes water.
C. Because it was now spring, Leah could stop to smell the roses.
D. As Leah jogged in the park, she noticed the smell of roses.

Correct answer: A

Rationale: The sentence in option A is a correctly punctuated simple sentence with a compound predicate ('spent... smelling'). It consists of a subject 'Leah and Jerry' and a compound predicate 'spent... smelling,' making it a complete sentence. Option B contains a comma splice, joining two independent clauses incorrectly with just a comma. Option C is a complex sentence with a dependent clause ('Because it was now spring') and an independent clause, not a simple sentence. Option D is a complex sentence with a dependent clause ('As Leah jogged in the park') and an independent clause, not a simple sentence. Therefore, option A is the only choice that represents a correctly punctuated simple sentence.

5. Which of the following is the intricate network of blood vessels responsible for transporting blood throughout the body?

A. Lymphatic system
B. Circulatory system
C. Nervous system
D. Respiratory system

Correct answer: B

Rationale: The circulatory system, comprising the heart, blood vessels (arteries, veins, and capillaries), and blood, is responsible for transporting blood, oxygen, nutrients, and waste products throughout the body. The lymphatic system aids in maintaining fluid balance and fighting infections; the nervous system transmits signals. The respiratory system facilitates the exchange of oxygen and carbon dioxide in the body, which is distinct from the circulatory system's role in blood transport. Therefore, the correct answer is the Circulatory system (Choice B). Choices A, C, and D are incorrect as they do not pertain to the intricate network of blood vessels responsible for transporting blood throughout the body.