Question 1

In a scientific experiment testing the effect of a new drug on blood pressure, which of the following best describes the dependent variable?

Accepted Answer

The measured change in blood pressure

Question 2

A researcher hypothesizes that a new herbicide will reduce the number of weeds in a plot. In this experiment, what is the independent variable?

Accepted Answer

The application of the new herbicide

Question 3

Which of the following is a controlled variable in an experiment comparing sleep deprivation and academic performance among high school students?

Accepted Answer

The fact that all students are from Los Angeles-area high schools

Question 4

A study finds that sacrificing sleep to study leads to more academic problems. Which of the following best explains the relationship between sleep and academic performance according to the study?

Accepted Answer

Reduced sleep due to extra studying causes increased academic problems

Question 5

Convert 160 cm to millimeters using metric conversion. Use the conversion factor $$1 \mathrm{cm} = 10 \mathrm{mm}.$$

Accepted Answer

$$1600 \mathrm{mm}$$

Question 6

A patient weighs 50 lbs. What is their weight in kilograms? Use the formula $$	ext{weight in kg} = \frac{	ext{weight in lbs}}{2.2}.$$

Accepted Answer

$$22.7 \mathrm{kg}$$

Question 7

Which directional term describes a structure that is toward or at the front of the body?

Accepted Answer

Ventral

Question 8

If a physician describes a tumor as being 'medial' to the left lung, what does this mean?

Accepted Answer

The tumor is located toward the midline of the body

Question 9

Which abdominal region is located directly below the umbilical region?

Accepted Answer

Hypogastric (pubic) region

Question 10

A nurse needs to administer a medication dosage in milligrams. If the prescription is for 1.0 L of solution and the concentration is $$1000 \mathrm{mg/L}$$, how many milligrams are in the full dose?

Accepted Answer

$$1000 \mathrm{mg}$$

Question 11

Which of the following best describes the control group in a scientific experiment?

Accepted Answer

Individuals used for comparison with the test group

Question 12

A student moves the decimal point three places to the left to convert 1000 mg to grams. What is the result?

Accepted Answer

$$1 \mathrm{g}$$

Question 13

Which directional term refers to a position away from the head end or toward the lower part of a structure?

Accepted Answer

Caudal

Question 14

A researcher wants to ensure that all participants in a sleep study are exposed to the same environmental conditions. What type of variable is this?

Accepted Answer

Controlled variable

Question 15

If a student sacrifices sleep to study more, what is the most likely outcome according to the UCLA study?

Accepted Answer

Increased academic problems the following day

Question 16

Which metric prefix represents a factor of $$10^{-3}$$?

Accepted Answer

Milli-

Question 17

A medication is prescribed at 14 kg. How many grams is this? Use the conversion $$1 \mathrm{kg} = 1000 \mathrm{g}.$$

Accepted Answer

$$14000 \mathrm{g}$$

Question 18

Which abdominal region is located to the right of the umbilical region?

Accepted Answer

Right lumbar region

Question 19

A scientist wants to test the effect of temperature on enzyme activity. What should be the dependent variable?

Accepted Answer

The rate of enzyme activity measured

Question 20

Which directional term describes a structure that is between a more medial and a more lateral structure?

Accepted Answer

Intermediate

Introduction to Scientific Method, Metric System, and Anatomical Orientation in Anatomy & Physiology

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