1. Which of the following is NOT a common site for lymph nodes?

A. Groin
B. Armpit
C. Neck
D. Liver

Correct answer: D

Rationale: The correct answer is D: 'Liver.' Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They are commonly found in areas such as the groin, armpit, and neck, where they help filter and trap harmful substances. The liver, while an important organ in the body, does not typically contain lymph nodes. Therefore, it is not a common site for lymph nodes. Understanding the locations of lymph nodes in the body is important for identifying potential sources of infection or cancer when assessing patients.

2. A medication order is for 250 micrograms of a drug to be administered subcutaneously. The available syringe measures in milliliters. How many milliliters should the nurse draw up?

A. 0.00025 milliliters
B. 0.0025 milliliters
C. 0.025 milliliters
D. 0.25 milliliters

Correct answer: B

Rationale: First convert micrograms to milliliters, knowing 1000 micrograms equal 1 milliliter. Divide the desired dosage (250 micrograms) by the conversion factor (1000 micrograms/milliliter) to find the volume needed: 250 micrograms / 1000 micrograms/milliliter = 0.00025 milliliters. However, drawing such a small volume might be inaccurate, so round to the nearest practical measurement, which is 0.0025 milliliters.

3. What is the difference between mass and weight?

A. Mass is the force exerted on an object due to gravity, whereas weight is the amount of matter in an object.
B. Mass is a measure of inertia, whereas weight is a measure of the force of gravity acting on an object.
C. Mass is measured in pounds, whereas weight is measured in kilograms.
D. Mass is a vector quantity, whereas weight is a scalar quantity.

Correct answer: b

Rationale: Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.

4. The pancreas secretes digestive enzymes into the small intestine. What enzyme breaks down proteins into amino acids?

A. Pepsin
B. Lipase
C. Amylase
D. Trypsin

Correct answer: D

Rationale: The correct answer is D: Trypsin. Trypsin is an enzyme produced by the pancreas and secreted into the small intestine where it plays a key role in breaking down proteins into smaller peptides and amino acids. Pepsin is produced in the stomach and specifically acts on protein, not in the small intestine. Lipase is an enzyme that breaks down fats, not proteins. Amylase is an enzyme that breaks down carbohydrates, not proteins. Therefore, Trypsin is the enzyme responsible for breaking down proteins into amino acids in the small intestine.

5. The main idea of the passage is that

A. history solely teaches us about past events and has no relevance to the present.
B. understanding history is crucial for comprehending current trends and shaping the future.
C. historical knowledge is merely an interesting collection of facts with no practical value.
D. learning from history requires solely focusing on its successes and ignoring its failures.

Correct answer: B

Rationale: Choice B accurately captures the passage's emphasis on history's multifaceted impact, providing insights into the present and potential visions for the future.

6. In a horizontal chart, the lowest level worker is located at the

A. Leftmost box
B. Middle
C. Rightmost box
D. Bottom

Correct answer: B

Rationale: In a horizontal chart, the lowest level worker is typically positioned at the leftmost side, with higher-level workers placed to the right. This arrangement signifies hierarchy, with the top level usually being on the rightmost side. Therefore, the correct answer is B: 'Middle,' as the lowest level worker is situated towards the left of the chart, not the extreme left or right. This positioning helps visually represent the organization's structure and indicates the progression from lower to higher levels as one moves from left to right on the chart.