Question 1

Which of the following best describes the difference between anatomy and physiology?

Accepted Answer

Anatomy studies the structure of body parts and their relationships, while physiology studies how those parts work and carry out life-sustaining activities.

Question 2

Arrange the following levels of organization in the human body from simplest to most complex: organ, tissue, cellular, chemical, organ system, organism.

Accepted Answer

Chemical, cellular, tissue, organ, organ system, organism

Question 3

Which of the following is a boundary organ, and what is its primary function?

Accepted Answer

The skin; it separates the internal environment from the external environment and controls exchange of materials.

Question 4

Which statement about fluid compartments in the human body is correct?

Accepted Answer

Extracellular fluid (ECF) includes interstitial fluid and plasma.

Question 5

A patient is experiencing dehydration. Which boundary organ system is primarily responsible for regulating water balance in the body?

Accepted Answer

Urinary system

Question 6

Homeostasis is best defined as:

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in the external environment.

Question 7

Which of the following is an example of a negative feedback mechanism?

Accepted Answer

Regulation of blood pressure by slowing heart rate and dilating arterioles when pressure increases.

Question 8

In a feedback loop, what is the role of the effector?

Accepted Answer

To produce a response that changes the controlled condition.

Question 9

Which equation best represents the relationship between blood pressure ($$BP$$), cardiac output ($$CO$$), and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$BP = CO 	imes TPR$$

Question 10

During childbirth, stretch receptors in the uterus send signals to the brain, which releases oxytocin, causing more contractions. This is an example of:

Accepted Answer

Positive feedback

Question 11

Which organ system is primarily responsible for exchanging oxygen and carbon dioxide between the body and the environment?

Accepted Answer

Respiratory system

Question 12

A break in a blood vessel wall initiates a cycle where platelets release chemicals that attract more platelets until a plug is formed. What type of feedback is this?

Accepted Answer

Positive feedback

Question 13

Which of the following best illustrates the structure-function relationship in the human body?

Accepted Answer

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

Question 14

Which of the following is NOT considered a boundary organ?

Accepted Answer

Heart

Question 15

If the extracellular fluid (ECF) sodium concentration increases, which boundary organ system is most likely to respond to restore homeostasis?

Accepted Answer

Urinary system

Question 16

Which of the following best describes the function of plasma in the body?

Accepted Answer

It is the fluid portion of blood and part of the extracellular fluid.

Question 17

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

Accepted Answer

Endocrine system

Question 18

A patient has a fever. Which feedback mechanism is most likely involved in returning the body temperature to normal?

Accepted Answer

Negative feedback

Question 19

Which of the following is the correct sequence of events in a negative feedback loop?

Accepted Answer

Receptor detects change, control center determines response, effector produces response

Question 20

Which of the following equations best represents the movement of solutes across capillary walls?

Accepted Answer

$$J = P 	imes (C_{ECF} - C_{ICF})$$

Introduction to Anatomy & Physiology: Foundational Concepts, Body Organization, and Homeostasis

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