When converting 1,500 milliliters to liters, what is the correct placement of the decimal point?
Move the decimal point three places to the left
Move the decimal point two places to the left
Move the decimal point three places to the right
Move the decimal point two places to the right
The Correct Answer is A
A. Move the decimal point three places to the left: Converting milliliters to liters requires dividing by 1,000 because 1 liter equals 1,000 milliliters. Moving the decimal three places to the left converts 1,500 mL to 1.5 L.
B. Move the decimal point two places to the left: Moving the decimal two places would convert 1,500 mL to 15 L, which is incorrect and significantly overestimates the volume.
C. Move the decimal point three places to the right: Moving the decimal to the right would multiply the value by 1,000, converting 1,500 mL to 1,500,000 L, which is inaccurate.
D. Move the decimal point two places to the right: This would convert 1,500 mL to 150,000 L, which is also incorrect.
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Related Questions
Correct Answer is C
Explanation
A. Mix both insulins in the vial before drawing them up: Mixing insulins directly in the vial is unsafe and can alter their pharmacokinetics, potentially causing unpredictable blood glucose control.
B. It does not matter which insulin is drawn up first: The order of drawing up insulins matters because improper sequence can contaminate the short-acting insulin with intermediate-acting insulin, affecting onset and duration of action.
C. Draw up regular insulin first, then NPH insulin: Regular insulin (short-acting) should always be drawn up before NPH insulin (intermediate-acting) to prevent contaminating the regular insulin with NPH, maintaining the intended onset and duration of both insulins.
D. Draw up NPH insulin first, then regular insulin: Drawing up NPH first increases the risk of contaminating the short-acting insulin with intermediate-acting insulin, which can delay its onset and compromise glycemic control.
Correct Answer is D
Explanation
A. Upper arm: The upper arm is an acceptable site for subcutaneous injections, but absorption is slower compared with the abdomen due to less vascularized subcutaneous tissue.
B. Thigh: The thigh is commonly used for subcutaneous injections, but absorption is slower than the abdomen. This site is often chosen for convenience rather than rapid onset.
C. Buttocks: The buttocks have thicker subcutaneous tissue and slower blood flow, resulting in slower absorption of insulin compared with other sites.
D. Abdomen: The abdomen provides the fastest absorption for subcutaneous insulin because it has rich vascularization and a consistent layer of subcutaneous fat, making it ideal for rapid onset of action.
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