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Nursing Elites

ATI TEAS 7

Chemistry

1. What is the term for a solution that contains less solute than the maximum amount it could dissolve at a specific temperature and pressure?

Correct answer: b

Rationale: An unsaturated solution is one in which less solute has dissolved than the maximum amount it could dissolve under specific conditions. The other choices do not accurately describe an unsaturated solution.

2. Which of the following phases of mitosis is characterized by the separation of sister chromatids and their movement to opposite poles?

Correct answer: B

Rationale: Rationale: During anaphase of mitosis, the sister chromatids, which are duplicated copies of a chromosome, separate and move towards opposite poles of the cell. This movement is facilitated by the shortening of microtubules attached to the chromatids. As a result, each pole of the cell receives a complete set of chromosomes, ensuring that the daughter cells produced after cell division will have the correct number of chromosomes. Metaphase is characterized by the alignment of chromosomes at the cell's equator, not their separation. Telophase is the phase following anaphase, where the separated chromatids reach the opposite poles and nuclear envelopes start to form around them. Cytokinesis is the final stage of cell division, where the cytoplasm is divided to form two separate daughter cells.

3. Negative feedback mechanisms are crucial in the endocrine system to:

Correct answer: B

Rationale: The correct answer is B: 'Maintain hormone levels within a specific range.' Negative feedback mechanisms in the endocrine system are essential for regulating hormone levels. These mechanisms work to counteract any deviations from the set point, ensuring that hormone levels remain balanced and within the optimal range for proper physiological function. Continuous hormone production (A) or constant release of hormones (C) would lead to imbalances and potential harm to the body. Disrupting communication between glands (D) would hinder the coordination necessary for maintaining homeostasis. Therefore, option B is the best choice as it highlights the critical role of negative feedback in keeping hormone levels stable and regulated.

4. A person is pushing a box across the floor. Which of the following forces is NOT doing work?

Correct answer: A

Rationale: Work is defined as the force applied in the direction of motion multiplied by the distance moved. Since the normal force acts perpendicular to the motion, it does not contribute to work.

5. A triangular scarf has sides measuring 10cm, 12cm, and 15cm. What is its perimeter?

Correct answer: C

Rationale: Simply add the lengths of all sides: perimeter = side1 + side2 + side3 = 10cm + 12cm + 15cm = 37cm.

6. Connective tissue provides support and connects other tissues. What is the main component that gives connective tissue its strength?

Correct answer: A

Rationale: The main component that gives connective tissue its strength is collagen fibers. Collagen is a fibrous protein that is the most abundant protein in the human body, providing tensile strength and support to tissues. Collagen fibers are arranged in a parallel fashion, giving connective tissue its resilience and ability to withstand stretching forces. Epithelial cells are not the main component of strength in connective tissue; they are specialized cells that line the surfaces of organs and structures. Nerve cells are responsible for transmitting signals and do not contribute to the strength of connective tissue. Blood cells are not structural components of connective tissue but rather play a role in transportation and immune function.

Similar Questions

Connective tissue provides support and connects other tissues. What is the main component that gives connective tissue its strength?
How does an increase in temperature generally affect the solubility of most solid solutes in a liquid solvent?
During which phase of the cell cycle does cytokinesis typically occur?
The word "obscurity" can be replaced with which of the following without changing the meaning?
Which type of muscle tissue contracts involuntarily and is found in organs like the heart and intestines?
A nurse needs to administer 0.8 milliliters of medication. The only available syringe measures in teaspoons. How many teaspoons should the nurse use?

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