bradycardia refers to a heart rate that is
Logo

Nursing Elites

ATI TEAS 7

TEAS 7 science practice questions

1. What does bradycardia refer to in terms of heart rate?

Correct answer: D

Rationale: Bradycardia refers to an abnormally slow heart rate, typically defined as less than 60 beats per minute. This condition can result in inadequate blood flow to meet the body's demands. It is crucial to distinguish between bradycardia and tachycardia, which is a fast heart rate, as they require different management strategies. Options A, B, and C are incorrect because they describe normal, slightly elevated, and significantly elevated heart rates, respectively, rather than an abnormally slow heart rate characteristic of bradycardia. Recognizing bradycardia is essential for appropriate evaluation and intervention in clinical settings.

2. A ball is thrown upwards. Which of the following statements is TRUE about its potential energy and kinetic energy at the peak of its trajectory?

Correct answer: B

Rationale: At the peak of its trajectory, the ball momentarily stops moving before falling back down. This means its kinetic energy is at a minimum because it has come to a stop. At the same time, its potential energy is at a maximum because it is at the highest point in its trajectory, where it has the most potential to fall and convert that potential energy into kinetic energy as it descends. Choice A is incorrect because at the peak, the ball still has potential energy due to its height. Choice C is incorrect because kinetic energy is at a minimum when the ball is momentarily at rest. Choice D is incorrect because the energy conversion between potential and kinetic energy occurs at different points in the trajectory.

3. Which of the following vessels is responsible for pumping oxygenated blood to the body?

Correct answer: D

Rationale: The aorta is the correct answer because it is responsible for pumping oxygenated blood from the heart to the rest of the body. The aorta is the main artery that carries blood away from the heart and distributes it to all parts of the body, providing oxygen and nutrients to the tissues. Choices A, B, and C are incorrect. The right ventricle pumps deoxygenated blood to the lungs through the pulmonary artery, the left ventricle pumps oxygenated blood to the body through the aorta, and the pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation.

4. What is the role of enzymes in the body?

Correct answer: B

Rationale: Enzymes act as biological catalysts that speed up chemical reactions in the body. They lower the activation energy required for reactions to occur, thus facilitating processes like digestion, metabolism, and other essential functions. Choice A is incorrect as the transportation of oxygen is primarily carried out by red blood cells. Choice C is incorrect as the regulation of body temperature involves mechanisms such as sweating and shivering. Choice D is incorrect as energy storage is mainly performed by molecules like glycogen and triglycerides.

5. Which statement is TRUE about valence electrons?

Correct answer: C

Rationale: Valence electrons are the outermost electrons in an atom's electron cloud and are crucial in forming chemical bonds with other atoms. These electrons determine the reactivity and chemical properties of an element, making option C the correct statement. Option A is incorrect as valence electrons are found in the outer shell, not the innermost shell. Option B is incorrect because valence electrons have lower binding energy compared to inner electrons. Option D is incorrect since valence electrons play a significant role in an element's chemical behavior.

Similar Questions

Which neurotransmitter is responsible for stimulating muscle contraction?
The Hardy-Weinberg equilibrium describes a population that is:
Which of the following areas has the least amount of sweat glands?
What term describes the bouncing back of waves after striking a surface or boundary?
Which of the following are the abdominal quadrants?

Access More Features

ATI TEAS Premium Plus
$150/ 90 days

  • Actual ATI TEAS 7 Questions
  • 3,000 questions with answers
  • 90 days access

ATI TEAS Basic
$99/ 30 days

  • 3,000 Questions with answers
  • 30 days access

Other Courses