Question 1

Which of the following best describes the difference between kinetic and potential energy in the context of human physiology?

Accepted Answer

Kinetic energy is the energy of motion, such as muscle contraction, while potential energy is stored energy, such as in ATP molecules.

Question 2

A solution contains 10 grams of glucose dissolved in enough water to make 100 mL of solution. What is the percent concentration of glucose in this solution?

Accepted Answer

$$10\%$$

Question 3

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 4

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water molecules are polar, allowing them to surround and separate ions in solution.

Question 5

A patient is given a medication that acts as a buffer in the blood. What is the primary function of this buffer?

Accepted Answer

To resist abrupt and large changes in pH by binding or releasing hydrogen ions.

Question 6

Which of the following is a correct representation of the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$\mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H}_2\mathrm{O}$$

Question 7

Which of the following best describes the difference between a molecule and a compound?

Accepted Answer

A molecule is any two or more atoms bonded together, while a compound is a molecule with two or more different kinds of atoms.

Question 8

Which of the following is an example of a synthesis reaction in the human body?

Accepted Answer

The joining of amino acids to form a protein.

Question 9

Which of the following best explains why enzymes are essential for life?

Accepted Answer

They lower the activation energy required for reactions, increasing reaction speed.

Question 10

A protein is exposed to high heat and extreme pH, causing it to lose its three-dimensional structure. What is this process called?

Accepted Answer

Denaturation

Question 11

Which of the following best describes the structure of a phospholipid?

Accepted Answer

Two fatty acids, one glycerol, and a phosphate group

Question 12

Which of the following is a property of water that is critical for maintaining body temperature homeostasis?

Accepted Answer

High heat capacity

Question 13

Which of the following best explains why carbon is considered the backbone of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds with other atoms.

Question 14

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

Accepted Answer

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

Question 15

Which of the following is a function of cholesterol in the human body?

Accepted Answer

It is a starting material for synthesis of vitamin D, steroid hormones, and bile salts.

Question 16

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

Accepted Answer

The sequence of amino acids in a polypeptide chain.

Question 17

Which of the following is true about ATP?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it when converted to ADP.

Question 18

Which of the following best describes the difference between fibrous and globular proteins?

Accepted Answer

Fibrous proteins provide mechanical support and tensile strength, while globular proteins are functional and include enzymes and antibodies.

Question 19

Which of the following is an example of an exchange (displacement) reaction?

Accepted Answer

$$\mathrm{AB} + \mathrm{CD} \rightarrow \mathrm{AD} + \mathrm{CB}$$

Chapter 2: Chemistry Comes Alive – Study Notes for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드