Question 1

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at sides with palms facing forward

Question 2

A patient presents with pain in the right lower quadrant of the abdomen. Which organ is most likely affected?

Accepted Answer

Appendix

Question 3

Which body plane divides the body into anterior and posterior sections?

Accepted Answer

Frontal (coronal) plane

Question 4

Which of the following best describes the process of hydrolysis in biological systems?

Accepted Answer

Breaking a molecule into two by adding water

Question 5

A buffer system in blood helps maintain pH by neutralizing excess acids or bases. Which equation best represents the bicarbonate buffer system?

Accepted Answer

$$\mathrm{CO_2$ + H_2O \leftrightarrow H_2CO_3 \leftrightarrow $$HCO_3$$^- + H^+}$$

Question 6

Which of the following is a correct example of oxidation in a biological context?

Accepted Answer

A molecule loses electrons during a reaction

Question 7

A scientist is studying the effect of pH on enzyme activity. At which pH would you expect pepsin, a stomach enzyme, to be most active?

Accepted Answer

pH 2

Question 8

Which of the following best describes the primary structure of a protein?

Accepted Answer

The sequence of amino acids in a polypeptide chain

Question 9

A patient is experiencing muscle weakness due to low potassium levels. Which ion is primarily responsible for generating action potentials in neurons?

Accepted Answer

Sodium ($$\mathrm{Na^+})$$

Question 10

Which of the following best describes the difference between anabolism and catabolism?

Accepted Answer

Anabolism builds molecules; catabolism breaks down molecules

Question 11

A molecule of ATP is hydrolyzed to ADP and inorganic phosphate. Which equation represents this reaction?

Accepted Answer

$$\mathrm{ATP + H_2O \rightarrow ADP + P_i + energy}$$

Question 12

Which of the following is a correct example of a directional term in anatomy?

Accepted Answer

The heart is superior to the diaphragm

Question 13

Which of the following body cavities contains the lungs?

Accepted Answer

Thoracic cavity

Question 14

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-7}$$ M. What is its pH?

Accepted Answer

pH 7

Question 15

Which of the following best describes the function of enzymes in biological reactions?

Accepted Answer

Enzymes decrease the activation energy required for reactions

Question 16

A patient has a blood pH of 7.1. Which term best describes this condition?

Accepted Answer

Acidosis

Question 17

Which of the following is a correct example of a negative feedback mechanism in the human body?

Accepted Answer

Release of insulin to lower blood glucose after a meal

Question 18

Which of the following best describes the scientific method?

Accepted Answer

A process involving observation, hypothesis, experimentation, and conclusion

Question 19

Which of the following best describes the role of mitochondria in cellular metabolism?

Accepted Answer

Site of ATP production via cellular respiration

Question 20

A patient is diagnosed with metabolic alkalosis. Which of the following could be a possible cause?

Accepted Answer

Excessive vomiting leading to loss of stomach acid

Anatomy & Physiology I: Exam and Lab Practical Study Guide

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