TEAS 7 Science Practice Test

TEAS 7 Science Practice Test Related

Review TEAS 7 Science Practice Test related questions and content

Which of the following lobes in the cerebral cortex is primarily responsible for processing and integrating sensory information received from the rest of the body?

  • A. frontal lobe
  • B. occipital lobe
  • C. parietal lobe
  • D. temporal lobe
Correct Answer: C

Rationale: The parietal lobe is the correct answer because it is primarily responsible for processing and integrating sensory information received from the rest of the body, including touch, pressure, temperature, and pain. This lobe plays a crucial role in spatial awareness, perception, and attention to sensory stimuli. It helps individuals make sense of the world around them and is essential for various sensory processes. The frontal lobe (choice A) is more associated with functions like reasoning, planning, and problem-solving. The occipital lobe (choice B) is responsible for processing visual information. The temporal lobe (choice D) is involved in functions like memory, auditory processing, and language comprehension, but it is not the primary lobe responsible for processing and integrating sensory information from the body.

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Which of the following describes the path through which air moves during inhalation?

  • A. mouth/nose > pharynx > larynx > trachea > bronchi > bronchioles > alveoli
  • B. bronchioles > alveoli > bronchi > larynx > pharynx > lungs
  • C. mouth/nose > bronchi > bronchioles > alveoli > lungs > trachea
  • D. alveoli > bronchioles > lungs > bronchi > trachea > larynx > pharynx > mouth/nose
Correct Answer: A

Rationale: The correct path through which air moves during inhalation is from the mouth/nose > pharynx > larynx > trachea > bronchi > bronchioles > alveoli. This sequence accurately represents the typical route air takes as it travels from the external environment into the lungs to facilitate gas exchange in the alveoli. Choice B is incorrect as it reverses the order of bronchioles and alveoli. Choice C is incorrect as it starts with mouth/nose but then incorrectly lists lungs before trachea. Choice D is incorrect as it reverses the entire sequence of the respiratory pathway, starting with alveoli instead of mouth/nose.

Which of the following is NOT a tissue layer found in skeletal bone?

  • A. periosteum
  • B. bone marrow
  • C. enamel
  • D. cancellous bone
Correct Answer: C

Rationale: Enamel is a hard, outer layer that covers the crown of a tooth and is not a tissue layer found in skeletal bone. The other options, periosteum, bone marrow, and cancellous bone, are all tissue layers or components found in skeletal bone. Periosteum is the connective tissue layer covering the bone surface, bone marrow is found within the bone cavities, and cancellous bone is a spongy, porous bone tissue.

Where is oxygen exchanged between blood and tissues?

  • A. capillaries
  • B. veins
  • C. ventricles
  • D. arteries
Correct Answer: A

Rationale: Oxygen is exchanged between blood and tissues primarily at the capillaries. Capillaries are the smallest blood vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and the tissues. This exchange process is crucial for delivering oxygen to the body's cells and eliminating carbon dioxide waste. Veins carry blood back to the heart, arteries carry blood away from the heart, and ventricles are the lower chambers of the heart responsible for pumping blood. Therefore, capillaries are the correct answer for where oxygen is exchanged between blood and tissues.

Which of the following sets of valves is primarily responsible for preventing blood flow from major blood vessels to the heart?

  • A. atrioventricular valves
  • B. semilunar valves
  • C. tricuspid valves
  • D. bicuspid valves
Correct Answer: B

Rationale: The correct answer is B: semilunar valves. Semilunar valves are primarily responsible for preventing blood flow from major blood vessels to the heart. These valves are located at the base of the aorta and the pulmonary artery, ensuring blood flows in one direction only by closing when the ventricles relax to prevent blood from flowing back into the heart. Choices A, C, and D are incorrect. Atrioventricular valves (choice A) include the tricuspid and bicuspid valves, which prevent backflow between the atria and ventricles, not major blood vessels. Tricuspid valves (choice C) and bicuspid valves (choice D) are specific types of atrioventricular valves located between the atria and ventricles, not at the base of major blood vessels.

Which of the following describes how atomic radius varies across the periodic table?

  • A. Atomic radius increases from top to bottom and left to right on the periodic table.
  • B. Atomic radius increases from top to bottom and right to left on the periodic table.
  • C. Atomic radius increases from top to bottom and toward the halogens on the periodic table.
  • D. Atomic radius increases from top to bottom and toward the noble gases on the periodic table.
Correct Answer: A

Rationale: Atomic radius tends to increase from top to bottom and left to right on the periodic table. This is because as you move down a group (top to bottom), new energy levels are added, increasing the distance of the outer electrons from the nucleus and thus increasing the size of the atom. On the other hand, as you move from left to right across a period, the number of protons and electrons increases, leading to a stronger nuclear charge that attracts the electrons closer to the nucleus, resulting in smaller atomic radii. Choice B is incorrect as atomic radius does not increase from right to left. Choices C and D are incorrect as they incorrectly associate the trend with specific groups of elements (halogens and noble gases) rather than the general trend observed on the periodic table.

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