Q: A sample is observed under a microscope at 100X magnification. The field diameter at this magnification is 2 mm. What is the field diameter at 400X magnification?

$$\text{Field diameter at 400X} = \frac{2\,\text{mm} \times 100}{400} = 0.5\,\text{mm}$$

Question 1

Which of the following best describes the function of the plasma membrane in a cell?

Accepted Answer

It is a boundary between the inside and outside of the cell, composed of a phospholipid bi-layer with embedded proteins.

Question 2

A scientist wants to convert a temperature of 25°C to Fahrenheit. Which equation should they use, and what is the correct answer?

Accepted Answer

Use $$F = (9/5)C + 32$$; the answer is 77°F.

Question 3

Which organ system is primarily responsible for transporting oxygen, nutrients, and waste products throughout the body?

Accepted Answer

Cardiovascular System

Question 4

During which phase of mitosis do chromatids separate and cytokinesis begins?

Accepted Answer

Anaphase

Question 5

A student is using a compound microscope with an ocular lens of 10X and an objective lens of 40X. What is the total magnification?

Accepted Answer

$$10 	imes 40 = 400X$$

Question 6

Which anatomical term refers to the anterior body trunk inferior to the ribs?

Accepted Answer

Abdominal

Question 7

A researcher measures the mass of an object in grams and its volume in milliliters. Which metric unit should they use to express density?

Accepted Answer

grams per milliliter ($$g/mL)$$

Question 8

Which organelle is responsible for ATP production in the cell?

Accepted Answer

Mitochondria

Question 9

A sample is observed under a microscope at 100X magnification. The field diameter at this magnification is 2 mm. What is the field diameter at 400X magnification?

Accepted Answer

$$	ext{Field diameter at 400X} = \frac{2\,	ext{mm} 	imes 100}{400} = 0.5\,	ext{mm}$$

Question 10

Which of the following is a dependent variable in a scientific experiment?

Accepted Answer

The factor that changes because of the independent variable

Question 11

Which body cavity contains the heart and lungs?

Accepted Answer

Thoracic cavity

Question 12

A patient has pain in the right lower quadrant (RLQ) of the abdomen. Which organ is most likely involved?

Accepted Answer

Appendix

Question 13

Which of the following best describes the anatomical position?

Accepted Answer

Standing with arms down and palms facing forward

Question 14

Which serous membrane surrounds the lungs?

Accepted Answer

Pleura

Question 15

Which organ system is responsible for the excretion of nitrogenous wastes?

Accepted Answer

Urinary System

Question 16

Which of the following structures is NOT part of the respiratory system?

Accepted Answer

Esophagus

Question 17

Which of the following best describes the function of lysosomes?

Accepted Answer

They contain digestive enzymes that eliminate worn-out cell structures and foreign substances.

Question 18

Which body plane divides the body into right and left halves?

Accepted Answer

Sagittal (longitudinal) plane

Question 19

A scientist collects data on the heights of 30 students. The highest value is 194 cm, and the lowest is 94 cm. What is the range?

Accepted Answer

$$194 - 94 = 100 cm$$

Question 20

Which of the following is a function of the skeletal system?

Accepted Answer

Support, protection, and blood cell formation

Anatomy & Physiology: Foundational Concepts, Organ Systems, and Cellular Structure

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