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Nursing Elites

ATI TEAS 7

Chemistry

1. An element with atomic number 26 and mass number 56 is most likely to be:

Correct answer: A

Rationale: Iron (Fe) - Fe-56 has 26 protons and aligns with the given atomic number and mass number.

2. What is the meaning of the idiom "to bite off more than one can chew"?

Correct answer: B

Rationale: The idiom warns against undertaking a task exceeding one's capabilities.

3. Which sentence uses the semicolon correctly?

Correct answer: B

Rationale: Option B joins two independent clauses related to the same event.

4. During inhalation, which muscle contracts to increase the volume of the thoracic cavity, allowing air to flow into the lungs?

Correct answer: A

Rationale: The correct answer is A: Diaphragm. During inhalation, the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity. This action creates a pressure difference between the lungs and the atmosphere, causing air to flow into the lungs. The intercostal muscles also play a role by expanding the ribcage, but the primary muscle responsible for increasing thoracic cavity volume during inhalation is the diaphragm. Abdominal muscles are involved in exhalation by contracting to push the diaphragm up, reducing thoracic cavity volume. Pectoral muscles are located in the chest and are not directly involved in the breathing process.

5. Define "acceleration" in terms of motion.

Correct answer: a

Rationale: Acceleration measures the rate of change of velocity with respect to time.

6. What is the shape of the DNA molecule?

Correct answer: C

Rationale: Rationale: The shape of the DNA molecule is a double helix. This structure was first described by James Watson and Francis Crick in 1953. The double helix shape consists of two strands that are twisted around each other in a spiral. This shape allows DNA to be compactly stored within the cell nucleus and provides stability to the molecule. The other options (A) Linear, (B) Circular, and (D) Straight chain do not accurately describe the shape of the DNA molecule.

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