Question 1

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

Accepted Answer

A molecule is formed when two or more atoms bond together, while a compound is a molecule that contains at least two different elements.

Question 2

A patient is experiencing muscle cramps due to an electrolyte imbalance. Which of the following best explains why electrolytes are important in the human body?

Accepted Answer

Electrolytes help maintain acid-base balance and are essential for nerve impulse transmission.

Question 3

Which of the following best describes a negative feedback mechanism in homeostasis?

Accepted Answer

It reverses a change in a controlled condition to maintain balance.

Question 4

A solution has a pH of 4. Which of the following statements is correct regarding this solution?

Accepted Answer

It is acidic and has a high concentration of hydrogen ions ($H^+$).

Question 5

Which of the following best explains the difference between a covalent bond and an ionic bond?

Accepted Answer

A covalent bond involves the sharing of electrons, while an ionic bond involves the transfer of electrons.

Question 6

A patient is diagnosed with metabolic alkalosis. Which of the following pH values would most likely be found in their blood?

Accepted Answer

$pH = 7.6$

Question 7

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at the sides, and palms facing forward.

Question 8

Which of the following best describes the difference between the visceral and parietal layers of a serous membrane?

Accepted Answer

The parietal layer lines the body cavity, while the visceral layer covers the organ.

Question 9

A cross-section of the abdomen is taken perpendicular to the long axis of the body. Which anatomical plane does this represent?

Accepted Answer

Transverse (horizontal) plane

Question 10

Which of the following best describes the main function of carbohydrates in the human body?

Accepted Answer

They provide a readily available source of energy.

Question 11

A scientist is analyzing a molecule with the formula $C_6H_{12}O_6$. Which of the following statements is correct?

Accepted Answer

The molecule contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Question 12

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA contains the sugar deoxyribose, while RNA contains the sugar ribose.

Question 13

A patient has a deficiency in proteins. Which of the following is NOT a function of proteins in the body?

Accepted Answer

Providing genetic information for inheritance

Question 14

Which of the following best describes the anatomical term 'proximal'?

Accepted Answer

Closer to the point of attachment of a limb to the trunk

Question 15

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

Accepted Answer

$AB \rightarrow A + B$

Question 16

Which of the following best describes the main difference between organic and inorganic molecules?

Accepted Answer

Organic molecules always contain carbon and hydrogen, while inorganic molecules do not necessarily contain both.

Question 17

Which of the following best describes the function of buffers in the human body?

Accepted Answer

Buffers maintain pH by minimizing changes in hydrogen ion concentration.

Question 18

A patient is found to have a high level of triglycerides in their blood. To which group of macromolecules do triglycerides belong?

Accepted Answer

Lipids

Question 19

Which of the following best describes the anatomical term 'superficial'?

Accepted Answer

Closer to the surface of the body

Question 20

Which of the following is the most abundant inorganic compound in the human body?

Accepted Answer

Water

Foundational Study Guide: Introduction to Anatomy & Physiology and Basic Chemistry

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