ATI TEAS Practice Test Science

ATI TEAS Practice Test Science Related

Review ATI TEAS Practice Test Science related questions and content

Which organ system is primarily responsible for transporting nutrients throughout the body?

  • A. Respiratory
  • B. Digestive
  • C. Circulatory
  • D. Nervous
Correct Answer: C

Rationale: The circulatory system, also known as the cardiovascular system, is primarily responsible for transporting nutrients and oxygen throughout the body. The heart pumps blood through blood vessels, delivering essential nutrients to cells and tissues. This system consists of the heart, blood vessels, and blood, working together to ensure the proper distribution of nutrients and removal of waste products. Choice A, the respiratory system, is responsible for gas exchange (oxygen and carbon dioxide) and not primarily involved in nutrient transportation. Choice B, the digestive system, is responsible for breaking down food and absorbing nutrients but does not transport nutrients throughout the body. Choice D, the nervous system, controls and coordinates body functions through electrical signals and is not directly involved in nutrient transportation.

You may also like to solve these questions

Which of the following statements regarding the working of the heart is not correct?

  • A. The atria contract, and the valves open to allow blood into the ventricles.
  • B. The heartbeat begins when the heart muscles relax, and blood flows into the atria.
  • C. The valves close to stop blood from flowing backward.
  • D. The ventricles contract, forcing blood to leave the heart.
Correct Answer: B

Rationale: The correct answer is B because the heartbeat actually begins when the heart muscles relax, allowing the chambers to fill with blood. The contraction phase follows, which propels blood out of the heart. The other statements are accurate in describing the normal sequence of events in the heart's functioning: the atria contract to push blood into the ventricles, the valves close to prevent backflow of blood, and the ventricles contract to pump blood out of the heart.

Which of the following is the largest organ in the human body?

  • A. Liver
  • B. Brain
  • C. Heart
  • D. Skin
Correct Answer: D

Rationale: The skin is the largest organ in the human body. It covers the entire body, serving as a protective barrier against pathogens, UV radiation, and physical damage. Additionally, the skin plays a crucial role in regulating body temperature and synthesizing vitamin D when exposed to sunlight. Choices A, B, and C are incorrect. The liver is the largest internal organ, the brain is the control center of the body, and the heart is a vital organ responsible for pumping blood throughout the body. However, none of these organs are the largest in terms of surface area or overall size.

What type of muscle is found in the walls of the heart?

  • A. Smooth muscle
  • B. Cardiac muscle
  • C. Skeletal muscle
  • D. Voluntary muscle
Correct Answer: B

Rationale: The correct answer is B: Cardiac muscle. Cardiac muscle is the specialized muscle found in the walls of the heart. It contracts involuntarily to pump blood throughout the body, ensuring circulation. Smooth muscle is typically found in organs like the intestines and blood vessels, aiding in their functions. Skeletal muscle is attached to bones and plays a vital role in movement and posture. Voluntary muscle is a general term for skeletal muscles that are under conscious control, unlike cardiac muscle which contracts involuntarily to maintain the heart's continuous pumping action.

Which type of blood vessel carries blood away from the heart?

  • A. Vein
  • B. Artery
  • C. Capillary
  • D. Venule
Correct Answer: B

Rationale: The correct answer is B: Artery. Arteries carry oxygen-rich blood away from the heart to various parts of the body. Veins, on the other hand, carry blood back to the heart. Capillaries are tiny blood vessels where oxygen and nutrients are exchanged with tissues. Venules are small veins that collect blood from capillaries, not from the heart, making them incorrect in this context.

Which term refers to a molecule of DNA and structural protein?

  • A. Lysosome
  • B. Centrosome
  • C. Chromosome
  • D. Genome
Correct Answer: C

Rationale: The correct answer is C: Chromosome. A chromosome is a structure composed of DNA and proteins that carries genetic information. It is the condensed form of DNA associated with structural proteins, not just a molecule of DNA or protein. Lysosomes are membrane-bound organelles containing digestive enzymes, not DNA and protein. Centrosomes are involved in cell division, not related to DNA and protein together. A genome refers to an organism's complete set of DNA, not specifically a molecule containing both DNA and structural protein.

Copyright © 2025 Nokea. All rights reserved.