ATI TEAS 7
Chemistry
1. Which type of nuclear force is responsible for holding protons and neutrons together in the nucleus of an atom?
- A. Electromagnetism
- B. Gravity
- C. Strong nuclear force
- D. Weak nuclear force
Correct answer: C
Rationale: The incredibly powerful, strong nuclear force overcomes the repulsive electrostatic force between protons, binding them together and stabilizing the nucleus.
2. What is the process by which the body reabsorbs water from the large intestine?
- A. Dehydration
- B. Osmosis
- C. Filtration
- D. Secretion
Correct answer: B
Rationale: Rationale: - Dehydration (Option A) refers to the condition of having insufficient water in the body, not the process of water reabsorption in the large intestine. - Osmosis (Option B) is the movement of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. In the large intestine, water is reabsorbed through osmosis to maintain the body's fluid balance. - Filtration (Option C) is a process where a liquid or gas passes through a filter to separate the components. It is not the primary mechanism for water reabsorption in the large intestine. - Secretion (Option D) is the release of substances from cells, but it is not the process by which the body reabsorbs water from the large intestine. Therefore, the correct process by which the body reabsorbs water from the large intestine is
3. What property of a wave determines the loudness of sound when heard by the human ear?
- A. Frequency
- B. Amplitude
- C. Wavelength
- D. Velocity
Correct answer: b
Rationale: The amplitude of a sound wave correlates with its perceived loudness by the human ear.
4. Which state of matter has particles that are highly organized in a fixed pattern and vibrate in place?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Correct answer: a
Rationale: In solids, particles are tightly packed in an ordered arrangement and vibrate around fixed positions, giving solids a definite shape and volume.
5. Antidiuretic hormone (ADH) plays a crucial role in regulating water balance. When ADH levels are high, what happens to urine production?
- A. Urine production increases significantly
- B. Urine production decreases to conserve water
- C. There is no change in urine production
- D. The kidneys stop producing urine altogether
Correct answer: B
Rationale: When antidiuretic hormone (ADH) levels are high, it indicates that the body needs to conserve water. ADH works by increasing the permeability of the collecting ducts in the kidneys, allowing more water to be reabsorbed back into the bloodstream. This action leads to a decrease in urine production, as the body retains more water to maintain proper fluid balance. Therefore, the correct answer is B: 'Urine production decreases to conserve water.' High levels of ADH help the body prevent dehydration by reducing the amount of water lost in urine.
6. What is the meaning of the phrase "to be on the same page"?
- A. To be physically close
- B. To agree or understand each other
- C. To be sharing the same goal
- D. To be facing the same direction
Correct answer: B
Rationale: The phrase means to be in agreement or share the same understanding.
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