Question

1. red blood cells have which of the following features?

a: the liquid portion of the blood
b: carry oxygen and carbon dioxide
c: may be so small that only one cell may pass through
d: none of the above

1. a prescription is written for 125mg of a medication. the label on the vial states \50mg per ml\. how many ml should be administered?

a: 2.5
b: 1.25
c: 2.0
d: 0.4

1. a drug that causes shedding of the outer layer of skin is called:

a: keratolytic
b: valtrex
c: antibiotic
d: librax

1. the temporal artery is located:

a: in the neck
b: at the wrist
c: slightly above outer edge of the eye
d: at the lower edge of the mandible

1. what is the abbreviation for white blood count?

a: wbc
b: wht
c: bcw
d: wc

Explanation:

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• Option A: The liquid portion of the blood is plasma, not red blood cells.
• Option B: Red blood cells contain hemoglobin which binds to oxygen and carbon dioxide for transport.
• Option C: Capillaries are so small that only one cell may pass through, not red blood cells.

Step1: Use the formula \( Volume=\frac{Desired\; dose}{Concentration} \)

We know the desired dose is \(125mg\) and the concentration is \(50mg/ml\).

Step2: Substitute values into the formula

\( Volume=\frac{125mg}{50mg/ml} = 2.5ml \)

• Option A: Keratolytic drugs cause shedding of the outer layer of skin.
• Option B: Valtrex is an antiviral drug (used for herpes).
• Option C: Antibiotics are used to treat bacterial infections.
• Option D: Librax is a combination drug for gastrointestinal disorders.

Answer:

B: carry oxygen and carbon dioxide

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