$\mathrm{C_6H_{12}O_6} + 6\mathrm{O_2} \rightarrow 6\mathrm{CO_2} + 6\mathrm{H_2O} + \text{energy}$

$[H^+] = 1 \times 10^{-3} \ \mathrm{mol/L}$

Question 1

Which of the following best describes homeostasis in the human body?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

A patient is experiencing hyperglycemia (high blood glucose). Which feedback mechanism is most likely to be activated to restore homeostasis?

Accepted Answer

Negative feedback loop involving insulin secretion.

Question 3

Which of the following is NOT one of the four major tissue types in the human body?

Accepted Answer

Adipose tissue

Question 4

Which equation correctly represents the metabolism equation for cellular respiration?

Accepted Answer

$\mathrm{C_6H_{12}O_6} + 6\mathrm{O_2} ightarrow 6\mathrm{CO_2} + 6\mathrm{H_2O} + 	ext{energy}$

Question 5

Which of the following best explains why water is considered a universal solvent?

Accepted Answer

Water's polarity allows it to dissolve many ionic and polar substances.

Question 6

Which type of chemical bond is least likely to dissolve in water?

Accepted Answer

Nonpolar covalent bond

Question 7

A solution has a pH of 3. What is the concentration of hydrogen ions $[H^+]$ in this solution?

Accepted Answer

$[H^+] = 1 	imes 10^{-3} \ \mathrm{mol/L}$

Question 8

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Formation of a disaccharide from two monosaccharides with the release of water.

Question 9

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 10

Which of the following best describes the fluid mosaic model of the cell membrane?

Accepted Answer

A dynamic structure composed of a phospholipid bilayer with embedded proteins that move laterally.

Question 11

Which of the following is an example of passive transport across the cell membrane?

Accepted Answer

Osmosis

Question 12

A red blood cell is placed in a hypotonic solution. What will happen to the cell?

Accepted Answer

It will swell and may burst due to water influx.

Question 13

Which of the following is NOT a function of proteins within the cell membrane?

Accepted Answer

Energy storage

Question 14

Which step of cellular respiration produces the most ATP?

Accepted Answer

Electron transport chain

Question 15

Which of the following best describes the Central Dogma of Biology?

Accepted Answer

DNA is transcribed into RNA, which is translated into protein.

Question 16

During protein synthesis, which process occurs first?

Accepted Answer

Transcription

Question 17

Which of the following best describes the role of the sodium-potassium pump?

Accepted Answer

It actively transports $3$ Na$^+$ ions out of the cell and $2$ K$^+$ ions into the cell, using ATP.

Question 18

Which of the following is a correct example of a positive feedback loop in the human body?

Accepted Answer

Release of oxytocin during childbirth to intensify uterine contractions.

Question 19

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes lower the activation energy required for chemical reactions.

Question 20

Which of the following best describes the difference between chromatin and chromosomes?

Accepted Answer

Chromatin is the loosely packed form of DNA, while chromosomes are tightly packed and visible during cell division.

Comprehensive Study Guide: Foundations of Anatomy & Physiology

Study Guide - Practice Questions