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ATI TEAS 7

Chemistry

1. What happens when an atom loses an electron?

Correct answer: B

Rationale: It gains a positive charge and becomes an ion. Losing an electron disrupts the charge balance, leaving the atom with more protons than electrons and a positive charge.

2. Which term describes the functional unit of a skeletal muscle responsible for muscle contraction?

Correct answer: b

Rationale: The correct answer is B: Sarcomere. A sarcomere is the functional unit of a skeletal muscle responsible for muscle contraction. It is made up of overlapping filaments of actin and myosin proteins. Myofibrils are long, cylindrical structures within muscle cells that contain sarcomeres. Tendons are tough bands of fibrous connective tissue that connect muscles to bones and facilitate movement. Myoglobin is a protein found in muscle cells that stores oxygen for muscle use during exercise. Therefore, the sarcomere is specifically responsible for muscle contraction, making it the correct answer in this question.

3. How does an increase in mass affect the force required to produce the same acceleration on an object?

Correct answer: a

Rationale: With an increase in mass, more force is needed to produce the same acceleration due to inertia.

4. "Ironic" and "serious" are:

Correct answer: B

Rationale: "Ironic" means the opposite of "serious."

5. What part of speech is the underlined word in the sentence "The students eagerly awaited the results"?

Correct answer: B

Rationale: Option B identifies "results" as the direct object of the verb "awaited," making it a noun.

6. What is the term for the maximum amount of solute that can dissolve in a solvent at a specific temperature and pressure?

Correct answer: b

Rationale: Solubility is the maximum amount of solute that can dissolve in a solvent at a specific temperature and pressure. The other choices do not accurately define solubility.

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