ATI TEAS 7
TEAS Test 7 science
1. Scoliosis is a condition characterized by abnormal lateral curvature of the spine. Which part of the spine is most commonly affected?
- A. Cervical spine (neck)
- B. Thoracic spine (upper back)
- C. Lumbar spine (lower back)
- D. All of the above
Correct answer: B
Rationale: Scoliosis most commonly affects the thoracic spine, which is the upper back region. While scoliosis can potentially affect any part of the spine, the thoracic spine is the most frequently involved area. This region is more commonly affected due to the natural structural curves of the spine and the biomechanics of the thoracic area. The cervical spine (neck) and lumbar spine (lower back) can also be affected by scoliosis, but the thoracic spine is the primary area of involvement in most cases. Therefore, the correct answer is B, as it is the part of the spine most commonly affected by scoliosis.
2. What is the molar mass of Ca(NO3)2?
- A. 74.1 g/mol
- B. 132.1 g/mol
- C. 164.1 g/mol
- D. 78.1 g/mol
Correct answer: B
Rationale: To calculate the molar mass of Ca(NO3)2, we add up the individual atomic masses of its elements: Ca (40.08) + 2N (2 * 14.01) + 6O (6 * 16.00) = 40.08 + 28.02 + 96.00 = 164.1 g/mol. Therefore, the correct answer is 164.1 g/mol (Choice C). Choice A (74.1 g/mol) is incorrect as it does not account for the correct sum of atomic masses. Choice B (132.1 g/mol) is the correct molar mass calculation for Ca(NO3)2. Choice D (78.1 g/mol) is incorrect and does not reflect the accurate molar mass of the compound.
3. Long-term potentiation (LTP) is a process in the brain associated with:
- A. Sensory perception
- B. Memory formation
- C. Muscle control
- D. Emotional regulation
Correct answer: B
Rationale: Long-term potentiation (LTP) is a process in the brain strongly associated with memory formation. It involves the strengthening of synapses between neurons, which is crucial for learning and memory. Sensory perception, muscle control, and emotional regulation are not directly related to LTP. Sensory perception involves the detection and processing of sensory information, muscle control pertains to movement coordination, and emotional regulation refers to the management of emotions, none of which are primarily influenced by LTP.
4. Which of the following structures is responsible for preventing the backflow of blood from the left ventricle into the left atrium?
- A. Aortic valve
- B. Pulmonary valve
- C. Tricuspid valve
- D. Mitral valve
Correct answer: D
Rationale: The correct answer is D, the Mitral valve. The mitral valve, also known as the bicuspid valve, is situated between the left atrium and the left ventricle. Its primary function is to prevent the backflow of blood from the left ventricle into the left atrium during ventricular contraction. The other choices are incorrect because: A) The aortic valve prevents backflow from the aorta into the left ventricle. B) The pulmonary valve prevents backflow from the pulmonary artery into the right ventricle. C) The tricuspid valve prevents backflow from the right ventricle into the right atrium.
5. Which of the following is a common property of both acids and bases?
- A. React with metals to produce hydrogen gas
- B. Taste sour
- C. Turn blue litmus paper red
- D. Conduct electricity when dissolved in water
Correct answer: D
Rationale: The correct answer is D. Both acids and bases can conduct electricity when dissolved in water. Acids ionize in water to produce H+ ions, which can carry an electric current, while bases ionize to produce OH- ions, which also conduct electricity. The other options are not common properties of both acids and bases. Reacting with metals to produce hydrogen gas is characteristic of acids, tasting sour is a property of acids, and turning blue litmus paper red is a property of bases, not a common property shared by both.
Similar Questions
Access More Features
ATI TEAS Premium Plus
$149.99/ 90 days
- Actual ATI TEAS 7 Questions
- 3,000 questions with answers
- 90 days access
ATI TEAS Basic
$49/ 30 days
- 3,000 Questions with answers
- 30 days access