Difficulty: Hard

Average Score: 44%

Which of the following statements is true regarding syringe parts and their functions?

Rationale

The barrel holds the withdrawn liquid, while the plunger manipulates the liquid.

The barrel of a syringe is the cylindrical part that contains the liquid, while the plunger is pushed or pulled to draw in or expel the liquid. This function is essential for the proper operation of the syringe in delivering accurate doses.

A (The plunger manipulates the liquid, while the Luer-lock locks in the correct dose) YOUR ANSWER

While the plunger does manipulate the liquid, the Luer-lock's primary function is not to lock in the correct dose but to securely attach the needle to the syringe. This statement inaccurately combines the roles of the parts, making it misleading.

B (The plunger contains measurement markings, while the Luer-lock locks in the needle) YOUR ANSWER

The plunger does not contain measurement markings; rather, it is the barrel that has these markings for dosage measurement. The Luer-lock indeed secures the needle, but this choice incorrectly attributes the measurement function to the plunger.

C (The needle holds the withdrawn liquid, while the plunger contains measurement markings) YOUR ANSWER

The needle does not hold the liquid; it is the barrel that holds the liquid. The plunger's role is to manipulate the liquid, while the barrel has the measurement markings. Thus, this statement incorrectly describes the functions of syringe parts.

Conclusion

Understanding the functions of syringe parts is crucial for their effective use. The barrel serves as the chamber for the liquid, while the plunger actively manipulates it to ensure accurate dosing. The other options misattribute the functions of the components, leading to confusion about how a syringe operates. Proper knowledge of these parts is vital for anyone utilizing syringes in medical or laboratory settings.

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