ATI TEAS 7
Chemistry
1. Which of the following is the neutral subatomic particle found in the nucleus of an atom?
- A. Electron
- B. Proton
- C. Neutron
- D. Positron
Correct answer: C
Rationale: Neutrons are subatomic particles found in the nucleus of an atom that have no charge. They have a mass of approximately 1 atomic mass unit (amu). The number of neutrons in an atom's nucleus contributes to the mass number of the atom, which is the total number of protons and neutrons in the nucleus.
2. Which property of a wave remains constant when it crosses a boundary between two different media?
- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Speed
Correct answer: d
Rationale: The speed of a wave remains constant when it crosses a boundary between two different media, although its direction may change.
3. The peripheral nervous system can be further divided into which two main parts?
- A. Sensory and motor
- B. Sympathetic and parasympathetic
- C. Myelinated and unmyelinated
- D. Central and peripheral
Correct answer: A
Rationale: The correct answer is A: 'Sensory and motor.' The peripheral nervous system is divided into two main parts based on their functions. The sensory division (afferent) transmits sensory information from receptors to the central nervous system, while the motor division (efferent) transmits signals from the central nervous system to muscles and glands to produce a response. Options B, C, and D are incorrect as they do not accurately describe the main divisions of the peripheral nervous system. Understanding this division is crucial in comprehending how information is processed and responses are generated in the body.
4. What type of energy is possessed by an object due to its position or configuration?
- A. Kinetic energy
- B. Thermal energy
- C. Potential energy
- D. Electrical energy
Correct answer: c
Rationale: Potential energy is the energy possessed by an object due to its position or state.
5. Which of the following is the main function of the heart?
- A. To filter blood
- B. To exchange gases
- C. To pump blood throughout the body
- D. To produce hormones
Correct answer: C
Rationale: Rationale: The main function of the heart is to pump blood throughout the body. The heart is a muscular organ that works as a pump to circulate blood, which carries oxygen and nutrients to the body's tissues and removes waste products. Option A is incorrect because the kidneys are responsible for filtering blood. Option B is incorrect because the exchange of gases, such as oxygen and carbon dioxide, occurs in the lungs. Option D is incorrect because hormone production is primarily carried out by endocrine glands such as the pituitary gland and the thyroid gland.
6. She came across a theory which states that the leadership style is effective dependent on the
- A. Democratic
- B. Authoritarian
- C. Laissez faire
- D. Bureaucratic
Correct answer: A
Rationale: The correct answer is A: "Democratic" because democratic leadership style is effective dependent on the participation and input of team members. In a democratic leadership style, decisions are made through discussion and consensus building, which can lead to higher levels of job satisfaction and productivity. Authoritarian leadership style emphasizes control and obedience, while laissez-faire leadership style lacks guidance and structure, and bureaucratic leadership style focuses on rules and regulations. Therefore, democratic leadership style is considered effective as it values the opinions and contributions of team members, leading to better outcomes and team cohesion.
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