A charge nurse is reinforcing teaching to a group of nurses about diffusion. Which of the following statements should the charge nurse include in their teaching about diffusion?

"Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration."

"Diffusion is the movement of particles between areas of equal concentrations."

"Diffusion is the movement of water from an area of higher concentration of water to an area of lower concentration of water."

"Diffusion is the movement of particles from an area of lower concentration of particles to an area of higher concentration of particles."

Answer and Explanation

The Correct Answer is A

A. "Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.": This statement accurately describes diffusion. Molecules move down their concentration gradient from areas of higher concentration to areas of lower concentration until equilibrium is reached.

B. "Diffusion is the movement of particles between areas of equal concentrations.": Diffusion does not occur between areas of equal concentration as there is no concentration gradient to drive the movement.

C. "Diffusion is the movement of water from an area of higher concentration of water to an area of lower concentration of water.": This describes osmosis, not diffusion. Osmosis specifically refers to the movement of water across a semipermeable membrane.

D. "Diffusion is the movement of particles from an area of lower concentration of particles to an area of higher concentration of particles.": This is incorrect as diffusion occurs from higher to lower concentration, not the reverse.

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Correct Answer is D

Explanation

A. "Water moves from areas where the concentration of sodium is higher to areas where the concentration is lower.": This statement incorrectly describes the direction of water movement. Water typically moves towards areas of higher solute concentration (higher sodium levels) through osmosis.

B. "Sodium moves from areas where the concentration of solute is lower to areas where the concentration is higher.": Sodium does not move this way in dehydration; the main issue is the movement of water, not sodium, in response to osmotic gradients.

C. "Water and sodium particles move together to areas where sodium particles are higher.": Water and sodium do not move together. Water follows solute (sodium) through osmotic processes, but sodium does not move in this manner during dehydration.

D. "Water moves from areas where the concentration of sodium is lower to the areas where the concentration of sodium is higher.": This statement correctly explains the principle of osmosis. In dehydration, water is lost from the body, leading to higher sodium concentration in the blood. This higher concentration draws water from cells to balance the osmotic pressure, resulting in elevated sodium levels.

A. Hypothermia B. Bradycardia C. Pulse deficit D. Tachypnea

Correct Answer is D

Explanation

A. Hypothermia: Pneumonia typically presents with fever rather than hypothermia. Fever is a common response to infection and inflammation.

B. Bradycardia: Pneumonia usually causes tachycardia rather than bradycardia. Tachycardia is a compensatory response to improve oxygen delivery to tissues.

C. Pulse deficit: A pulse deficit is not a common finding in pneumonia. It is more associated with conditions like atrial fibrillation.

D. Tachypnea: Tachypnea, or rapid breathing, is a common sign of pneumonia. It reflects the body’s attempt to improve oxygenation and compensate for impaired gas exchange.

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A charge nurse is reinforcing teaching to a group of nurses about diffusion. Which of the following statements should the charge nurse include in their teaching about diffusion?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is D

Explanation

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