Question 1

Which of the following best describes the role of enzymes in metabolic reactions within the human body?

Accepted Answer

Enzymes act as catalysts, lowering the activation energy and allowing reactions to occur at body temperature.

Question 2

A patient is experiencing muscle weakness due to an imbalance in electrolytes. Which organ system is primarily responsible for regulating electrolyte levels in the body?

Accepted Answer

Urinary system

Question 3

Which of the following is an example of negative feedback in homeostatic regulation?

Accepted Answer

Sweating to cool the body when overheated

Question 4

A molecule of water ($$H_2O) is $$held together by which type of chemical bond?

Accepted Answer

Polar covalent bond

Question 5

Which anatomical direction term describes a structure that is closer to the midline of the body?

Accepted Answer

Medial

Question 6

A solution has a pH of 4. Which statement is true regarding this solution?

Accepted Answer

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

Question 7

Which of the following best explains why water is considered an essential reactant in the chemical reactions of living systems?

Accepted Answer

Water participates directly in hydrolysis and dehydration synthesis reactions.

Question 8

A patient is found to have a genetic mutation affecting the structure of their ribose sugar in nucleic acids. Which molecule is most likely to be directly affected?

Accepted Answer

RNA

Question 9

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while unsaturated fatty acids contain one or more double bonds.

Question 10

Which organ system is primarily responsible for transporting nutrients, gases, and waste products throughout the body?

Accepted Answer

Cardiovascular system

Question 11

A buffer in the blood helps maintain pH by which of the following mechanisms?

Accepted Answer

By releasing or removing $$H^+$$ ions as needed

Question 12

Which of the following is a property of a hydrogen bond?

Accepted Answer

It is a weak attraction between a slightly positive hydrogen atom and a slightly negative atom of another molecule.

Question 13

Which of the following best describes the anatomical position?

Accepted Answer

Standing with hands at the sides, palms facing forward, and feet together

Question 14

A patient is unable to absorb nutrients properly due to damage in the small intestine. Which organ system is directly affected?

Accepted Answer

Digestive system

Question 15

Which of the following is true regarding the atomic number of an element?

Accepted Answer

It is the number of protons in an atom.

Question 16

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

Accepted Answer

Hydrolysis of ATP to ADP and phosphate

Question 17

Which of the following best describes the function of the serous membranes lining the body cavities?

Accepted Answer

They produce watery fluid to reduce friction between organs and body walls.

Question 18

Which of the following is a property of organic compounds?

Accepted Answer

They always contain a C-H covalent bond.

Question 19

A person is lying face up on an examination table. What is the correct anatomical term for this position?

Accepted Answer

Supine

Question 20

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

Accepted Answer

Kinetic energy is the energy of motion, while potential energy is stored energy.

Fundamental Concepts in Anatomy & Physiology: Structure, Function, and Chemistry of Life

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