Q: A solution has a pH of 4. What is the concentration of free hydrogen ions $$[H^+] in $$this solution?

$$[H^+] = 1 \times 10$$^{-4}$$ \text{ M}$$

Question 1

Which of the following best describes the concept of homeostasis in human physiology?

Accepted Answer

The maintenance of a relatively stable internal environment, regulated within a range of values.

Question 2

A scientist is studying how red blood cells transport oxygen. Which type of explanation is she using if she focuses on the molecular mechanism by which hemoglobin binds oxygen?

Accepted Answer

Mechanistic explanation

Question 3

Which of the following is a correct statement about ATP in cellular metabolism?

Accepted Answer

ATP is the mitochondria's matrix and is the cell's primary energy currency.

Question 4

A patient has a genetic disorder affecting the smooth endoplasmic reticulum (ER) in liver cells. Which function is most likely to be impaired?

Accepted Answer

Detoxification of drugs and synthesis of lipids

Question 5

Which of the following best describes a meta-analysis in scientific research?

Accepted Answer

A statistical technique that combines data from multiple studies to extract significant trends.

Question 6

Which of the following is NOT a function of the Golgi complex?

Accepted Answer

Synthesis of ribosomal RNA

Question 7

A researcher is measuring the effect of a new drug on blood glucose levels. Blood glucose is plotted on the vertical axis, while drug dosage is on the horizontal axis. Which is the dependent variable?

Accepted Answer

Blood glucose level

Question 8

Which of the following amino acids is classified as essential?

Accepted Answer

Valine

Question 9

Which cell organelle is primarily responsible for generating most of the cell’s ATP?

Accepted Answer

Mitochondrion

Question 10

A mutation causes a cell to lack ribosomes. Which process would be most directly affected?

Accepted Answer

Protein synthesis

Question 11

Which of the following best describes a glycosylated molecule?

Accepted Answer

A sugar molecule attached to a carbohydrate

Question 12

Which of the following cell junctions allows direct cell-to-cell communication?

Accepted Answer

Gap junction

Question 13

A solution has a pH of 4. What is the concentration of free hydrogen ions $$[H^+] in $$this solution?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$ 	ext{ M}$$

Question 14

Which of the following is a monomeric carbohydrate that serves as a building block for complex carbohydrates?

Accepted Answer

Glucose

Question 15

A patient is diagnosed with a lysosomal storage disease. Which cellular function is most likely impaired?

Accepted Answer

Breakdown of bacteria and old organelles

Question 16

Which of the following elements makes up more than 90% of the body’s mass?

Accepted Answer

Oxygen

Question 17

Which organelle is responsible for modifying, sorting, and packaging proteins for secretion?

Accepted Answer

Golgi complex

Question 18

Which of the following best describes the structure of a fatty acid?

Accepted Answer

A carboxylic acid group attached to a hydrocarbon tail

Question 19

Which of the following is a function of peroxisomes in the cell?

Accepted Answer

Degradation of long-chain fatty acids and detoxification of toxic molecules

Question 20

A crossover study design is characterized by which of the following?

Accepted Answer

Each individual serves as both the experimental subject and the control subject at different times.

Foundations of Anatomy & Physiology: Key Concepts, Cell Structure, and Biomolecules

Study Guide - Practice Questions

Study Guide - Flashcards