Question 1

Which of the following best illustrates the principle of complementarity of structure and function in the human body?

Accepted Answer

The thin walls of alveoli in the lungs facilitate rapid gas exchange.

Question 2

A patient suffers a severe burn that destroys the epidermis and dermis. Which necessary life function is most directly compromised?

Accepted Answer

Maintaining boundaries

Question 3

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

Accepted Answer

Atoms → Molecules → Organelles → Cells → Tissues → Organs → Systems → Organism

Question 4

A person is exposed to high altitude, where atmospheric pressure is significantly lower than at sea level. Which survival need is most directly affected?

Accepted Answer

Appropriate atmospheric pressure

Question 5

Which of the following best describes a negative feedback mechanism?

Accepted Answer

A rise in blood glucose stimulates insulin release, which lowers blood glucose.

Question 6

Which organ system is primarily responsible for eliminating nitrogenous wastes from the body?

Accepted Answer

Urinary system

Question 7

A marathon runner collapses from dehydration. Which survival need is most immediately threatened?

Accepted Answer

Water

Question 8

Which of the following is an example of interdependence among organ systems?

Accepted Answer

The respiratory system supplies oxygen to the blood, which the cardiovascular system transports to tissues.

Question 9

A patient with uncontrolled diabetes has high blood glucose levels. Which component of the homeostatic control mechanism is most likely malfunctioning?

Accepted Answer

Effector

Question 10

Which necessary life function is most directly associated with the process described by the equation below?

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$

Accepted Answer

Metabolism

Question 11

Which of the following best describes the role of a receptor in a homeostatic control system?

Accepted Answer

It detects changes in a variable and sends information to the control center.

Question 12

Which organ system is most directly responsible for responsiveness, as defined in necessary life functions?

Accepted Answer

Nervous system

Question 13

A patient is unable to sweat due to a genetic disorder. Which necessary life function and survival need are most likely to be affected during exercise?

Accepted Answer

Excretion and normal body temperature

Question 14

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

Accepted Answer

Blood clotting accelerates as platelets release chemicals to attract more platelets.

Question 15

Which organ system is primarily responsible for producing hormones that regulate other body functions?

Accepted Answer

Endocrine system

Question 16

A person with kidney failure cannot remove urea from the blood. Which necessary life function is most directly impaired?

Accepted Answer

Excretion

Question 17

Which of the following best explains why oxygen is a critical survival need?

Accepted Answer

It is required for the chemical reactions that produce ATP.

Question 18

Which of the following scenarios best demonstrates homeostatic imbalance?

Accepted Answer

A person with hypothermia cannot maintain a stable internal temperature.

Question 19

Which organ system is most directly involved in the absorption of nutrients?

Accepted Answer

Digestive system

Question 20

A person is exposed to a cold environment and begins to shiver. Which components of the homeostatic control system are involved in this response? (Select the best answer.)

Accepted Answer

Receptor, control center, and effector

Introduction to the Human Body: Study Guide

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