ATI TEAS 7
physics
1. What is the term for the time it takes for a wave to complete one full cycle?
- A. Frequency
- B. Amplitude
- C. Period
- D. Wavelength
Correct answer: c
Rationale: The period of a wave is the time taken for one complete oscillation or cycle.
2. Which of the following is NOT a common site for lymph nodes?
- A. Groin
- B. Armpit
- C. Neck
- D. Liver
Correct answer: D
Rationale: The correct answer is D: 'Liver.' Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They are commonly found in areas such as the groin, armpit, and neck, where they help filter and trap harmful substances. The liver, while an important organ in the body, does not typically contain lymph nodes. Therefore, it is not a common site for lymph nodes. Understanding the locations of lymph nodes in the body is important for identifying potential sources of infection or cancer when assessing patients.
3. What is the difference between heat and temperature?
- A. They are the same thing.
- B. Heat is a form of energy, while temperature measures the average kinetic energy of particles.
- C. Heat flows from cold to hot, while temperature flows from hot to cold.
- D. Heat is measured in Celsius, while temperature is measured in Joules.
Correct answer: B
Rationale: Heat is a form of energy transfer, while temperature reflects the average kinetic energy of particles within a substance.
4. Which property of matter remains constant regardless of changes in gravity?
- A. Mass
- B. Weight
- C. Volume
- D. Density
Correct answer: A
Rationale: Mass is a measure of the amount of matter in an object and remains constant regardless of changes in gravity. Weight, on the other hand, is the force of gravity acting on an object's mass and can vary depending on the strength of gravity. Volume is the amount of space an object occupies, which can change depending on the environment, and density is the mass of an object per unit volume, which can also change with variations in gravity.
5. Which hormone, produced by the adrenal glands, prepares the body for a "fight or flight" response by increasing heart rate, dilating airways, and mobilizing energy stores?
- A. Cortisol
- B. Aldosterone
- C. Epinephrine
- D. Insulin
Correct answer: c
Rationale: The correct answer is C: Epinephrine. Epinephrine, also known as adrenaline, is the hormone produced by the adrenal glands that prepares the body for a 'fight or flight' response. It increases heart rate to pump more blood to muscles, dilates airways to improve oxygen intake, and mobilizes energy stores to provide immediate fuel for physical activity. Cortisol is a hormone involved in stress response and metabolism regulation, but it does not directly trigger the rapid physiological changes associated with 'fight or flight.' Aldosterone regulates salt and water balance, while insulin regulates blood sugar levels, neither of which are directly involved in preparing the body for a rapid response to danger or stress.
6. Which of the following is an example of a weak acid?
- A. Hydrochloric acid (HCl)
- B. Sulfuric acid (H2SO4)
- C. Acetic acid (CH3COOH)
- D. Nitric acid (HNO3)
Correct answer: C
Rationale: Weak acids only partially dissociate in water, releasing a lower concentration of hydrogen ions.
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