Question 1

Which of the following best describes the principle of complementarity of structure and function in human anatomy and physiology?

Accepted Answer

The structure of a body part determines its function, and vice versa.

Question 2

A patient is unable to maintain a stable internal body temperature after suffering a brain injury. Which core principle is most directly affected?

Accepted Answer

Feedback loops

Question 3

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

Accepted Answer

Blood clotting after a vessel injury

Question 4

Which level of structural organization is immediately above the tissue level in the human body?

Accepted Answer

Organ level

Question 5

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-7}$$ M. What is its pH?

Accepted Answer

$$pH = 7$$

Question 6

Which of the following best explains why water is an excellent solvent for ionic and polar substances?

Accepted Answer

Water molecules form hydrogen bonds with ions and polar molecules, stabilizing them in solution.

Question 7

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy and speed up chemical reactions.

Question 8

A molecule of oxygen gas ($$O_2) is $$held together by which type of chemical bond?

Accepted Answer

Double covalent bond

Question 9

Which of the following best describes the role of gradients in physiology?

Accepted Answer

Gradients drive the movement of substances from areas of higher to lower concentration, pressure, or temperature.

Question 10

Which of the following is a correct pairing of an organic compound with its monomer?

Accepted Answer

Carbohydrate – Monosaccharide

Question 11

A patient is given a radiotracer containing Iodine-131 to diagnose a thyroid disorder. Which property of Iodine-131 makes it useful for this purpose?

Accepted Answer

It is a radioisotope that emits detectable radiation.

Question 12

Which of the following best describes the difference between a polar covalent bond and a nonpolar covalent bond?

Accepted Answer

Polar covalent bonds share electrons unequally, creating partial charges; nonpolar covalent bonds share electrons equally.

Question 13

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

Accepted Answer

Cardiovascular system

Question 14

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

Accepted Answer

Acting as enzymes to speed up chemical reactions

Question 15

A buffer system in the blood helps maintain pH by:

Accepted Answer

Resisting changes in pH by accepting or donating hydrogen ions

Question 16

Which of the following best explains why phospholipids are essential for cell membrane structure?

Accepted Answer

They are amphiphilic, with hydrophilic heads and hydrophobic tails, forming a bilayer.

Question 17

Which of the following is NOT a characteristic of a negative feedback loop?

Accepted Answer

It amplifies the initial change until an endpoint is reached.

Question 18

Which of the following best describes the role of ATP in the cell?

Accepted Answer

ATP is the main energy currency, providing energy for cellular processes.

Question 19

Which of the following is a correct sequence of the levels of structural organization in the human body, from simplest to most complex?

Accepted Answer

Chemical → Cellular → Tissue → Organ → Organ system → Organism

Question 20

Which of the following is a real-life example of cell-cell communication in the human body?

Accepted Answer

A nerve cell releasing a neurotransmitter to stimulate a muscle cell

Introduction to Anatomy and Physiology: Foundational Concepts and Chemical Principles

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